From 6679de6427cdcd1db07ca3dff213530da8c6c18a Mon Sep 17 00:00:00 2001
From: jarzec <jarek.glowacki@gmail.com>
Date: Fri, 2 May 2025 01:01:28 +0200
Subject: [PATCH 1/2] CI: Replace Clang-18 with CLang-19

---
 .github/workflows/regression-tests.yml        |  11 +-
 regression-tests/run-tests.sh                 |   4 +-
 .../pure2-default-arguments.cpp.output        |   7 --
 .../clang-version.output                      |   0
 .../mixed-allcpp1-hello.cpp.execution         |   0
 ...ixed-as-for-variant-20-types.cpp.execution |   0
 .../mixed-bounds-check.cpp.execution          |   0
 ...-bounds-safety-with-assert-2.cpp.execution |   0
 ...ed-bounds-safety-with-assert.cpp.execution |   0
 ...pressions-and-postconditions.cpp.execution |   0
 .../mixed-default-arguments.cpp.execution     |   0
 .../mixed-fixed-type-aliases.cpp.execution    |   0
 .../mixed-float-literals.cpp.execution        |   0
 .../mixed-forwarding.cpp.execution            |   0
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 ...ranges-for-each-with-capture.cpp.execution |   0
 ...sion-and-std-ranges-for-each.cpp.execution |   0
 ...ression-with-pointer-capture.cpp.execution |   0
 ...ession-with-repeated-capture.cpp.execution |   0
 .../mixed-hello.cpp.execution                 |   0
 .../mixed-increment-decrement.cpp.execution   |   0
 ...-safety-3-contract-violation.cpp.execution |   0
 ...ixed-initialization-safety-3.cpp.execution |   0
 .../mixed-inspect-templates.cpp.execution     |   0
 .../mixed-inspect-values-2.cpp.execution      |   0
 .../mixed-inspect-values.cpp.execution        |   0
 ...ed-intro-example-three-loops.cpp.execution |   0
 ...or-with-counter-include-last.cpp.execution |   0
 ...xed-is-as-value-with-variant.cpp.execution |   0
 .../mixed-is-as-variant.cpp.execution         |   0
 ...me-safety-and-null-contracts.cpp.execution |   0
 ...fetime-safety-pointer-init-4.cpp.execution |   0
 ...mixed-multiple-return-values.cpp.execution |   0
 .../mixed-out-destruction.cpp.execution       |   0
 ...arameter-passing-generic-out.cpp.execution |   0
 .../mixed-parameter-passing.cpp.execution     |   0
 ...-postexpression-with-capture.cpp.execution |   0
 .../mixed-string-interpolation.cpp.execution  |   0
 .../mixed-test-parens.cpp.execution           |   0
 .../mixed-type-safety-1.cpp.execution         |   0
 ...-multiple-template-arguments.cpp.execution |   0
 .../pure2-assert-expected-not-null.cpp.output |   0
 ...re2-assert-optional-not-null.cpp.execution |   0
 ...2-assert-shared-ptr-not-null.cpp.execution |   0
 ...2-assert-unique-ptr-not-null.cpp.execution |   0
 .../pure2-bounds-safety-span.cpp.execution    |   0
 .../pure2-break-continue.cpp.execution        |   0
 ...r-memberwise-base-assignment.cpp.execution |   0
 ...bugfix-for-template-argument.cpp.execution |   0
 ...e2-bugfix-for-ufcs-arguments.cpp.execution |   0
 .../pure2-chained-comparisons.cpp.execution   |   0
 .../pure2-contracts.cpp.execution             |   0
 .../pure2-default-arguments.cpp.output        |   0
 ...-comparisons-and-final-types.cpp.execution |   0
 .../pure2-enum.cpp.execution                  |   0
 .../pure2-expected-is-as.cpp.output           |   0
 ...2-for-loop-range-with-lambda.cpp.execution |   0
 .../pure2-forward-return.cpp.execution        |   0
 ...n-multiple-forward-arguments.cpp.execution |   0
 ...pression-body-default-return.cpp.execution |   0
 .../pure2-function-typeids.cpp.execution      |   0
 .../pure2-hashable.cpp.execution              |   0
 .../pure2-hello.cpp.execution                 |   0
 ...lization-safety-with-else-if.cpp.execution |   0
 ...eric-function-multiple-types.cpp.execution |   0
 ...-with-as-in-generic-function.cpp.execution |   0
 ...ck-with-variant-any-optional.cpp.execution |   0
 ...ty-with-variant-any-optional.cpp.execution |   0
 .../pure2-interpolation.cpp.execution         |   0
 ...re2-intro-example-hello-2022.cpp.execution |   0
 ...e2-intro-example-three-loops.cpp.execution |   0
 ...ith-free-functions-predicate.cpp.execution |   0
 ...e2-is-with-polymorphic-types.cpp.execution |   0
 ...2-is-with-unnamed-predicates.cpp.execution |   0
 ...2-is-with-variable-and-value.cpp.execution |   0
 .../pure2-last-use.cpp.execution              |   0
 .../pure2-last-use.cpp.output                 |   0
 ...eter-across-unnamed-function.cpp.execution |   0
 .../pure2-main-args.cpp.execution             |   0
 .../pure2-more-wildcards.cpp.execution        |   0
 .../pure2-print.cpp.execution                 |   0
 .../pure2-range-operators.cpp.execution       |   0
 ...ng-literal-and-interpolation.cpp.execution |   0
 .../pure2-regex-general.cpp.output            | 116 +++++++++---------
 .../pure2-regex_01_char_matcher.cpp.execution |   0
 .../pure2-regex_02_ranges.cpp.execution       |   0
 .../pure2-regex_03_wildcard.cpp.execution     |   0
 .../pure2-regex_04_start_end.cpp.execution    |   0
 .../pure2-regex_05_classes.cpp.execution      |   0
 .../pure2-regex_06_boundaries.cpp.execution   |   0
 ...pure2-regex_07_short_classes.cpp.execution |   0
 .../pure2-regex_08_alternatives.cpp.execution |   0
 .../pure2-regex_09_groups.cpp.execution       |   0
 .../pure2-regex_10_escapes.cpp.execution      |   0
 ...e2-regex_11_group_references.cpp.execution |   0
 ...e2-regex_12_case_insensitive.cpp.execution |   0
 ...-regex_13_posessive_modifier.cpp.execution |   0
 ...regex_13_possessive_modifier.cpp.execution |   0
 ...-regex_14_multiline_modifier.cpp.execution |   0
 ...re2-regex_15_group_modifiers.cpp.execution |   0
 ...egex_16_perl_syntax_modifier.cpp.execution |   0
 .../pure2-regex_17_comments.cpp.execution     |   0
 .../pure2-regex_18_branch_reset.cpp.execution |   0
 .../pure2-regex_19_lookahead.cpp.execution    |   0
 ...re2-regex_21_atomic_patterns.cpp.execution |   0
 .../pure2-repeated-call.cpp.execution         |   0
 .../pure2-requires-clauses.cpp.execution      |   0
 .../pure2-return-tuple-operator.cpp.execution |   0
 ...2-statement-scope-parameters.cpp.execution |   0
 ...-rightshift-and-rightshifteq.cpp.execution |   0
 ...re2-template-parameter-lists.cpp.execution |   0
 ...2-type-and-namespace-aliases.cpp.execution |   0
 .../pure2-type-constraints.cpp.execution      |   0
 .../pure2-type-safety-1.cpp.execution         |   0
 ...ty-2-with-inspect-expression.cpp.execution |   0
 .../pure2-types-basics.cpp.execution          |   0
 .../pure2-types-down-upcast.cpp.execution     |   0
 .../pure2-types-inheritance.cpp.execution     |   0
 ...der-independence-and-nesting.cpp.execution |   0
 ...-ordering-via-meta-functions.cpp.execution |   0
 ...nd-that-1-provide-everything.cpp.execution |   0
 ...ide-mvconstruct-and-cpassign.cpp.execution |   0
 ...ide-mvconstruct-and-mvassign.cpp.execution |   0
 ...rovide-cpassign-and-mvassign.cpp.execution |   0
 ...ide-nothing-but-general-case.cpp.execution |   0
 .../pure2-types-that-parameters.cpp.execution |   0
 ...lue-types-via-meta-functions.cpp.execution |   0
 .../pure2-union.cpp.execution                 |   0
 .../pure2-unsafe.cpp.execution                |   0
 .../pure2-variadics.cpp.execution             |   0
 .../{clang-18-c++20 => clang-19-c++20}/xyzzy  |   0
 .../clang-version.output                      |   0
 .../mixed-allcpp1-hello.cpp.execution         |   0
 ...ixed-as-for-variant-20-types.cpp.execution |   0
 .../mixed-bounds-check.cpp.execution          |   0
 ...-bounds-safety-with-assert-2.cpp.execution |   0
 ...ed-bounds-safety-with-assert.cpp.execution |   0
 ...pressions-and-postconditions.cpp.execution |   0
 .../mixed-default-arguments.cpp.execution     |   0
 .../mixed-fixed-type-aliases.cpp.execution    |   0
 .../mixed-float-literals.cpp.execution        |   0
 .../mixed-forwarding.cpp.execution            |   0
 ...-expression-and-std-for-each.cpp.execution |   0
 ...ranges-for-each-with-capture.cpp.execution |   0
 ...sion-and-std-ranges-for-each.cpp.execution |   0
 ...ression-with-pointer-capture.cpp.execution |   0
 ...ession-with-repeated-capture.cpp.execution |   0
 .../mixed-hello.cpp.execution                 |   0
 .../mixed-increment-decrement.cpp.execution   |   0
 ...-safety-3-contract-violation.cpp.execution |   0
 ...ixed-initialization-safety-3.cpp.execution |   0
 .../mixed-inspect-templates.cpp.execution     |   0
 .../mixed-inspect-values-2.cpp.execution      |   0
 .../mixed-inspect-values.cpp.execution        |   0
 ...ed-intro-example-three-loops.cpp.execution |   0
 ...or-with-counter-include-last.cpp.execution |   0
 ...xed-is-as-value-with-variant.cpp.execution |   0
 .../mixed-is-as-variant.cpp.execution         |   0
 ...me-safety-and-null-contracts.cpp.execution |   0
 ...fetime-safety-pointer-init-4.cpp.execution |   0
 ...mixed-multiple-return-values.cpp.execution |   0
 .../mixed-out-destruction.cpp.execution       |   0
 ...arameter-passing-generic-out.cpp.execution |   0
 .../mixed-parameter-passing.cpp.execution     |   0
 ...-postexpression-with-capture.cpp.execution |   0
 .../mixed-string-interpolation.cpp.execution  |   0
 .../mixed-test-parens.cpp.execution           |   0
 .../mixed-type-safety-1.cpp.execution         |   0
 ...-multiple-template-arguments.cpp.execution |   0
 ...re2-assert-expected-not-null.cpp.execution |   0
 ...re2-assert-optional-not-null.cpp.execution |   0
 ...2-assert-shared-ptr-not-null.cpp.execution |   0
 ...2-assert-unique-ptr-not-null.cpp.execution |   0
 .../pure2-bounds-safety-span.cpp.execution    |   0
 .../pure2-break-continue.cpp.execution        |   0
 ...r-memberwise-base-assignment.cpp.execution |   0
 ...bugfix-for-template-argument.cpp.execution |   0
 ...e2-bugfix-for-ufcs-arguments.cpp.execution |   0
 .../pure2-chained-comparisons.cpp.execution   |   0
 .../pure2-contracts.cpp.execution             |   0
 .../pure2-default-arguments.cpp.execution     |   4 +
 .../pure2-default-arguments.cpp.output        |   0
 ...-comparisons-and-final-types.cpp.execution |   0
 .../pure2-enum.cpp.execution                  |   0
 .../pure2-expected-is-as.cpp.execution        |   0
 ...2-for-loop-range-with-lambda.cpp.execution |   0
 .../pure2-forward-return.cpp.execution        |   0
 ...n-multiple-forward-arguments.cpp.execution |   0
 ...pression-body-default-return.cpp.execution |   0
 .../pure2-function-typeids.cpp.execution      |   0
 .../pure2-hashable.cpp.execution              |   0
 .../pure2-hello.cpp.execution                 |   0
 ...lization-safety-with-else-if.cpp.execution |   0
 ...eric-function-multiple-types.cpp.execution |   0
 ...-with-as-in-generic-function.cpp.execution |   0
 ...ck-with-variant-any-optional.cpp.execution |   0
 ...ty-with-variant-any-optional.cpp.execution |   0
 .../pure2-interpolation.cpp.execution         |   0
 ...re2-intro-example-hello-2022.cpp.execution |   0
 ...e2-intro-example-three-loops.cpp.execution |   0
 ...ith-free-functions-predicate.cpp.execution |   0
 ...e2-is-with-polymorphic-types.cpp.execution |   0
 ...2-is-with-unnamed-predicates.cpp.execution |   0
 ...2-is-with-variable-and-value.cpp.execution |   0
 .../pure2-last-use.cpp.execution              |   0
 .../pure2-last-use.cpp.output                 |   0
 ...eter-across-unnamed-function.cpp.execution |   0
 .../pure2-main-args.cpp.execution             |   0
 .../pure2-more-wildcards.cpp.execution        |   0
 .../pure2-print.cpp.execution                 |   0
 .../pure2-range-operators.cpp.execution       |   0
 ...ng-literal-and-interpolation.cpp.execution |   0
 .../pure2-regex-general.cpp.execution         |  11 ++
 .../pure2-regex_01_char_matcher.cpp.execution |   0
 .../pure2-regex_02_ranges.cpp.execution       |   0
 .../pure2-regex_03_wildcard.cpp.execution     |   0
 .../pure2-regex_04_start_end.cpp.execution    |   0
 .../pure2-regex_05_classes.cpp.execution      |   0
 .../pure2-regex_06_boundaries.cpp.execution   |   0
 ...pure2-regex_07_short_classes.cpp.execution |   0
 .../pure2-regex_08_alternatives.cpp.execution |   0
 .../pure2-regex_09_groups.cpp.execution       |   0
 .../pure2-regex_10_escapes.cpp.execution      |   0
 ...e2-regex_11_group_references.cpp.execution |   0
 ...e2-regex_12_case_insensitive.cpp.execution |   0
 ...-regex_13_posessive_modifier.cpp.execution |   0
 ...regex_13_possessive_modifier.cpp.execution |   0
 ...-regex_14_multiline_modifier.cpp.execution |   0
 ...re2-regex_15_group_modifiers.cpp.execution |   0
 ...egex_16_perl_syntax_modifier.cpp.execution |   0
 .../pure2-regex_17_comments.cpp.execution     |   0
 .../pure2-regex_18_branch_reset.cpp.execution |   0
 .../pure2-regex_19_lookahead.cpp.execution    |   0
 ...re2-regex_21_atomic_patterns.cpp.execution |   0
 .../pure2-repeated-call.cpp.execution         |   0
 .../pure2-requires-clauses.cpp.execution      |   0
 .../pure2-return-tuple-operator.cpp.execution |   0
 ...2-statement-scope-parameters.cpp.execution |   0
 ...-rightshift-and-rightshifteq.cpp.execution |   0
 ...re2-template-parameter-lists.cpp.execution |   0
 ...2-type-and-namespace-aliases.cpp.execution |   0
 .../pure2-type-constraints.cpp.execution      |   0
 .../pure2-type-safety-1.cpp.execution         |   0
 ...ty-2-with-inspect-expression.cpp.execution |   0
 .../pure2-types-basics.cpp.execution          |   0
 .../pure2-types-down-upcast.cpp.execution     |   0
 .../pure2-types-inheritance.cpp.execution     |   0
 ...der-independence-and-nesting.cpp.execution |   0
 ...-ordering-via-meta-functions.cpp.execution |   0
 ...nd-that-1-provide-everything.cpp.execution |   0
 ...ide-mvconstruct-and-cpassign.cpp.execution |   0
 ...ide-mvconstruct-and-mvassign.cpp.execution |   0
 ...rovide-cpassign-and-mvassign.cpp.execution |   0
 ...ide-nothing-but-general-case.cpp.execution |   0
 .../pure2-types-that-parameters.cpp.execution |   0
 ...lue-types-via-meta-functions.cpp.execution |   0
 .../pure2-union.cpp.execution                 |   0
 .../pure2-unsafe.cpp.execution                |   0
 .../pure2-variadics.cpp.execution             |   0
 .../xyzzy                                     |   0
 260 files changed, 83 insertions(+), 70 deletions(-)
 delete mode 100644 regression-tests/test-results/clang-18-c++23-libcpp/pure2-default-arguments.cpp.output
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/clang-version.output (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-allcpp1-hello.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-as-for-variant-20-types.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-bounds-check.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-bounds-safety-with-assert-2.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-bounds-safety-with-assert.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-captures-in-expressions-and-postconditions.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-default-arguments.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-fixed-type-aliases.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-float-literals.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-forwarding.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-function-expression-and-std-for-each.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-function-expression-and-std-ranges-for-each.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-function-expression-with-pointer-capture.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-function-expression-with-repeated-capture.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-hello.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-increment-decrement.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-initialization-safety-3-contract-violation.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-initialization-safety-3.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-inspect-templates.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-inspect-values-2.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-inspect-values.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-intro-example-three-loops.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-intro-for-with-counter-include-last.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-is-as-value-with-variant.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-is-as-variant.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-lifetime-safety-and-null-contracts.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-lifetime-safety-pointer-init-4.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-multiple-return-values.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-out-destruction.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-parameter-passing-generic-out.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-parameter-passing.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-postexpression-with-capture.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-string-interpolation.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-test-parens.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-type-safety-1.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/mixed-ufcs-multiple-template-arguments.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-assert-expected-not-null.cpp.output (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-assert-optional-not-null.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-assert-shared-ptr-not-null.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-assert-unique-ptr-not-null.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-bounds-safety-span.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-break-continue.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-bugfix-for-memberwise-base-assignment.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-bugfix-for-template-argument.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-bugfix-for-ufcs-arguments.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-chained-comparisons.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-contracts.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-default-arguments.cpp.output (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-defaulted-comparisons-and-final-types.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-enum.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-expected-is-as.cpp.output (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-for-loop-range-with-lambda.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-forward-return.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-function-multiple-forward-arguments.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-function-single-expression-body-default-return.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-function-typeids.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-hashable.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-hello.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-initialization-safety-with-else-if.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-inspect-expression-in-generic-function-multiple-types.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-inspect-expression-with-as-in-generic-function.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-inspect-fallback-with-variant-any-optional.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++20 => clang-19-c++20}/pure2-interpolation.cpp.execution (100%)
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 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-regex_17_comments.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-regex_18_branch_reset.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-regex_19_lookahead.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-regex_21_atomic_patterns.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-repeated-call.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-requires-clauses.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-return-tuple-operator.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-statement-scope-parameters.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-synthesize-rightshift-and-rightshifteq.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-template-parameter-lists.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-type-and-namespace-aliases.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-type-constraints.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-type-safety-1.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-type-safety-2-with-inspect-expression.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-types-basics.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-types-down-upcast.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-types-inheritance.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-types-order-independence-and-nesting.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-types-ordering-via-meta-functions.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-types-smf-and-that-1-provide-everything.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-types-that-parameters.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-types-value-types-via-meta-functions.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-union.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-unsafe.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/pure2-variadics.cpp.execution (100%)
 rename regression-tests/test-results/{clang-18-c++23-libcpp => clang-19-c++23-libcpp}/xyzzy (100%)

diff --git a/.github/workflows/regression-tests.yml b/.github/workflows/regression-tests.yml
index 5a1b62545e..23bafb29ac 100644
--- a/.github/workflows/regression-tests.yml
+++ b/.github/workflows/regression-tests.yml
@@ -27,12 +27,12 @@ jobs:
         include:
           - os: ubuntu-24.04
             shortosname: ubu-24
-            compiler: clang++-18
+            compiler: clang++-19
             cxx_std: c++20
             stdlib: libstdc++
           - os: ubuntu-24.04
             shortosname: ubu-24
-            compiler: clang++-18
+            compiler: clang++-19
             cxx_std: c++23
             stdlib: libc++-18-dev
           - os: ubuntu-22.04
@@ -74,12 +74,17 @@ jobs:
     - name: Checkout repo
       uses: actions/checkout@v4
 
-    - name: Prepare compilers
+    - name: Prepare compilers - macOS
       if: matrix.os == 'macos-13'
       run: |
         sudo xcode-select --switch /Applications/Xcode_14.3.1.app
         sudo ln -s "$(brew --prefix llvm@15)/bin/clang" /usr/local/bin/clang++-15
 
+    - name: Prepare compilers - Ubuntu 24.04
+      if: matrix.os == 'ubuntu-24.04'
+      run: |
+        sudo sudo apt-get install clang-19
+
     - name: Run regression tests - Linux and macOS version
       if: startsWith(matrix.os, 'ubuntu') || startsWith(matrix.os, 'macos')
       run: |
diff --git a/regression-tests/run-tests.sh b/regression-tests/run-tests.sh
index 6e3ac81b7b..af5cbbebac 100644
--- a/regression-tests/run-tests.sh
+++ b/regression-tests/run-tests.sh
@@ -169,8 +169,8 @@ else
         exec_out_dir="$expected_results_dir/clang-12"
     elif [[ "$compiler_version" == *"clang version 15.0"* ]]; then 
         exec_out_dir="$expected_results_dir/clang-15"
-    elif [[ "$compiler_version" == *"clang version 18.1"* ]]; then 
-        exec_out_dir="$expected_results_dir/clang-18"
+    elif [[ "$compiler_version" == *"clang version 19.1"* ]]; then 
+        exec_out_dir="$expected_results_dir/clang-19"
     elif [[ "$compiler_version" == *"g++-10"* ]]; then
         exec_out_dir="$expected_results_dir/gcc-10"
     elif [[ "$compiler_version" == *"g++-12"* ||
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-default-arguments.cpp.output b/regression-tests/test-results/clang-18-c++23-libcpp/pure2-default-arguments.cpp.output
deleted file mode 100644
index 1b5962fb79..0000000000
--- a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-default-arguments.cpp.output
+++ /dev/null
@@ -1,7 +0,0 @@
-pure2-default-arguments.cpp2:6:56: error: cannot take address of consteval function 'current' outside of an immediate invocation
-    6 |     char const* fn = CPP2_UFCS_NONLOCAL(function_name)(std::source_location::current())
-      |                                                        ^
-/usr/lib/llvm-18/bin/../include/c++/v1/source_location:60:36: note: declared here
-   60 |   static consteval source_location current(__bsl_ty __ptr = __builtin_source_location()) noexcept {
-      |                                    ^
-1 error generated.
diff --git a/regression-tests/test-results/clang-18-c++20/clang-version.output b/regression-tests/test-results/clang-19-c++20/clang-version.output
similarity index 100%
rename from regression-tests/test-results/clang-18-c++20/clang-version.output
rename to regression-tests/test-results/clang-19-c++20/clang-version.output
diff --git a/regression-tests/test-results/clang-18-c++20/mixed-allcpp1-hello.cpp.execution b/regression-tests/test-results/clang-19-c++20/mixed-allcpp1-hello.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++20/mixed-allcpp1-hello.cpp.execution
rename to regression-tests/test-results/clang-19-c++20/mixed-allcpp1-hello.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++20/mixed-as-for-variant-20-types.cpp.execution b/regression-tests/test-results/clang-19-c++20/mixed-as-for-variant-20-types.cpp.execution
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rename from regression-tests/test-results/clang-18-c++20/mixed-as-for-variant-20-types.cpp.execution
rename to regression-tests/test-results/clang-19-c++20/mixed-as-for-variant-20-types.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++20/mixed-bounds-check.cpp.execution b/regression-tests/test-results/clang-19-c++20/mixed-bounds-check.cpp.execution
similarity index 100%
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diff --git a/regression-tests/test-results/clang-18-c++20/mixed-bounds-safety-with-assert-2.cpp.execution b/regression-tests/test-results/clang-19-c++20/mixed-bounds-safety-with-assert-2.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/mixed-bounds-safety-with-assert.cpp.execution b/regression-tests/test-results/clang-19-c++20/mixed-bounds-safety-with-assert.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/mixed-captures-in-expressions-and-postconditions.cpp.execution b/regression-tests/test-results/clang-19-c++20/mixed-captures-in-expressions-and-postconditions.cpp.execution
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rename to regression-tests/test-results/clang-19-c++20/mixed-captures-in-expressions-and-postconditions.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++20/mixed-default-arguments.cpp.execution b/regression-tests/test-results/clang-19-c++20/mixed-default-arguments.cpp.execution
similarity index 100%
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rename to regression-tests/test-results/clang-19-c++20/mixed-default-arguments.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++20/mixed-fixed-type-aliases.cpp.execution b/regression-tests/test-results/clang-19-c++20/mixed-fixed-type-aliases.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/mixed-float-literals.cpp.execution b/regression-tests/test-results/clang-19-c++20/mixed-float-literals.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/mixed-forwarding.cpp.execution b/regression-tests/test-results/clang-19-c++20/mixed-forwarding.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/mixed-function-expression-and-std-for-each.cpp.execution b/regression-tests/test-results/clang-19-c++20/mixed-function-expression-and-std-for-each.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.execution b/regression-tests/test-results/clang-19-c++20/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/mixed-function-expression-and-std-ranges-for-each.cpp.execution b/regression-tests/test-results/clang-19-c++20/mixed-function-expression-and-std-ranges-for-each.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/mixed-function-expression-with-pointer-capture.cpp.execution b/regression-tests/test-results/clang-19-c++20/mixed-function-expression-with-pointer-capture.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/mixed-function-expression-with-repeated-capture.cpp.execution b/regression-tests/test-results/clang-19-c++20/mixed-function-expression-with-repeated-capture.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/mixed-hello.cpp.execution b/regression-tests/test-results/clang-19-c++20/mixed-hello.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/mixed-increment-decrement.cpp.execution b/regression-tests/test-results/clang-19-c++20/mixed-increment-decrement.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/mixed-initialization-safety-3-contract-violation.cpp.execution b/regression-tests/test-results/clang-19-c++20/mixed-initialization-safety-3-contract-violation.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/mixed-inspect-templates.cpp.execution b/regression-tests/test-results/clang-19-c++20/mixed-inspect-templates.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/mixed-inspect-values-2.cpp.execution b/regression-tests/test-results/clang-19-c++20/mixed-inspect-values-2.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/mixed-intro-for-with-counter-include-last.cpp.execution b/regression-tests/test-results/clang-19-c++20/mixed-intro-for-with-counter-include-last.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/mixed-is-as-value-with-variant.cpp.execution b/regression-tests/test-results/clang-19-c++20/mixed-is-as-value-with-variant.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/mixed-lifetime-safety-pointer-init-4.cpp.execution b/regression-tests/test-results/clang-19-c++20/mixed-lifetime-safety-pointer-init-4.cpp.execution
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index 40ba2e6c35..fd1623b5dc 100644
--- a/regression-tests/test-results/clang-18-c++20/pure2-regex-general.cpp.output
+++ b/regression-tests/test-results/clang-19-c++20/pure2-regex-general.cpp.output
@@ -1,65 +1,65 @@
 PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
 Stack dump:
-0.	Program arguments: /usr/lib/llvm-18/bin/clang -cc1 -triple x86_64-pc-linux-gnu -emit-obj -mrelax-all -dumpdir test.exe- -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name pure2-regex-general.cpp -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=all -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/home/runner/work/cppfront/cppfront/regression-tests/test-results/clang-18-c++20 -fcoverage-compilation-dir=/home/runner/work/cppfront/cppfront/regression-tests/test-results/clang-18-c++20 -resource-dir /usr/lib/llvm-18/lib/clang/18 -I ../../../include -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14 -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/x86_64-linux-gnu/c++/14 -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/backward -internal-isystem /usr/lib/llvm-18/lib/clang/18/include -internal-isystem /usr/local/include -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -std=c++20 -fdeprecated-macro -ferror-limit 19 -pthread -fgnuc-version=4.2.1 -fno-implicit-modules -fskip-odr-check-in-gmf -fcxx-exceptions -fexceptions -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/pure2-regex-general-8173f8.o -x c++ pure2-regex-general.cpp
+0.	Program arguments: /usr/lib/llvm-18/bin/clang -cc1 -triple x86_64-pc-linux-gnu -emit-obj -mrelax-all -dumpdir test.exe- -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name pure2-regex-general.cpp -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=all -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/home/runner/work/cppfront/cppfront/regression-tests/test-results/clang-18-c++20 -fcoverage-compilation-dir=/home/runner/work/cppfront/cppfront/regression-tests/test-results/clang-18-c++20 -resource-dir /usr/lib/llvm-18/lib/clang/18 -I ../../../include -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14 -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/x86_64-linux-gnu/c++/14 -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/backward -internal-isystem /usr/lib/llvm-18/lib/clang/18/include -internal-isystem /usr/local/include -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -std=c++20 -fdeprecated-macro -ferror-limit 19 -pthread -fgnuc-version=4.2.1 -fno-implicit-modules -fskip-odr-check-in-gmf -fcxx-exceptions -fexceptions -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/pure2-regex-general-61d726.o -x c++ pure2-regex-general.cpp
 1.	<eof> parser at end of file
 2.	cpp2regex.h2:833:113: instantiating function definition 'cpp2::regex::regular_expression<char, general_regex_test::regex_01_matcher<char>>::find_all<const char *, (lambda at pure2-regex-general.cpp2:13:16)>'
 3.	pure2-regex-general.cpp2:13:16: instantiating function definition 'general_regex_test::run()::(anonymous class)::operator()<cpp2::regex::regular_expression<char, general_regex_test::regex_01_matcher<char>>::search_return<const char *>>'
 4.	pure2-regex-general.cpp2:15:54 <Spelling=../../../include/cpp2util.h:10058:66>: instantiating function definition 'general_regex_test::run()::(anonymous class)::operator()(const cpp2::regex::regular_expression<char, general_regex_test::regex_01_matcher<char>>::search_return<const char *> &)::(anonymous class)::operator()<const cpp2::regex::regular_expression<char, general_regex_test::regex_01_matcher<char>>::search_return<const char *> &, int>'
- #0 0x00007f4a111a63bf llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xda63bf)
- #1 0x00007f4a111a44f9 llvm::sys::RunSignalHandlers() (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xda44f9)
- #2 0x00007f4a111a6b00 (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xda6b00)
- #3 0x00007f4a0fc45320 (/lib/x86_64-linux-gnu/libc.so.6+0x45320)
- #4 0x00007f4a19318f6a clang::Sema::tryCaptureVariable(clang::ValueDecl*, clang::SourceLocation, clang::Sema::TryCaptureKind, clang::SourceLocation, bool, clang::QualType&, clang::QualType&, unsigned int const*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1718f6a)
- #5 0x00007f4a192e10a6 clang::Sema::BuildDeclRefExpr(clang::ValueDecl*, clang::QualType, clang::ExprValueKind, clang::DeclarationNameInfo const&, clang::NestedNameSpecifierLoc, clang::NamedDecl*, clang::SourceLocation, clang::TemplateArgumentListInfo const*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x16e10a6)
- #6 0x00007f4a192e1005 clang::Sema::BuildDeclRefExpr(clang::ValueDecl*, clang::QualType, clang::ExprValueKind, clang::DeclarationNameInfo const&, clang::CXXScopeSpec const*, clang::NamedDecl*, clang::SourceLocation, clang::TemplateArgumentListInfo const*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x16e1005)
- #7 0x00007f4a192e533c clang::Sema::BuildDeclarationNameExpr(clang::CXXScopeSpec const&, clang::DeclarationNameInfo const&, clang::NamedDecl*, clang::NamedDecl*, clang::TemplateArgumentListInfo const*, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x16e533c)
- #8 0x00007f4a19777871 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b77871)
- #9 0x00007f4a1977abfb (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b7abfb)
-#10 0x00007f4a197599c4 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b599c4)
-#11 0x00007f4a19770a28 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b70a28)
-#12 0x00007f4a19760341 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b60341)
-#13 0x00007f4a1976681c (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b6681c)
-#14 0x00007f4a1976b4b4 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b6b4b4)
-#15 0x00007f4a1976e08d (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b6e08d)
-#16 0x00007f4a1976b4b4 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b6b4b4)
-#17 0x00007f4a19772670 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b72670)
-#18 0x00007f4a19765c77 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b65c77)
-#19 0x00007f4a1978645a (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b8645a)
-#20 0x00007f4a1978449f (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b8449f)
-#21 0x00007f4a19770669 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b70669)
-#22 0x00007f4a1975fa03 clang::Sema::SubstStmt(clang::Stmt*, clang::MultiLevelTemplateArgumentList const&) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b5fa03)
-#23 0x00007f4a197a1f26 clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1ba1f26)
-#24 0x00007f4a18fecde0 clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref<void ()>) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x13ecde0)
-#25 0x00007f4a1970280e clang::Sema::DeduceReturnType(clang::FunctionDecl*, clang::SourceLocation, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b0280e)
-#26 0x00007f4a192d6bc9 clang::Sema::DiagnoseUseOfDecl(clang::NamedDecl*, llvm::ArrayRef<clang::SourceLocation>, clang::ObjCInterfaceDecl const*, bool, bool, clang::ObjCInterfaceDecl*, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x16d6bc9)
-#27 0x00007f4a195de3ce (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x19de3ce)
-#28 0x00007f4a195e5884 clang::Sema::BuildCallToObjectOfClassType(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x19e5884)
-#29 0x00007f4a192dbb7d clang::Sema::BuildCallExpr(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::Expr*, bool, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x16dbb7d)
-#30 0x00007f4a192f60a1 clang::Sema::ActOnCallExpr(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::Expr*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x16f60a1)
-#31 0x00007f4a1976b65d (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b6b65d)
-#32 0x00007f4a1976f44e (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b6f44e)
-#33 0x00007f4a1976f42d (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b6f42d)
-#34 0x00007f4a1975fa77 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b5fa77)
-#35 0x00007f4a19770669 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b70669)
-#36 0x00007f4a1975fa03 clang::Sema::SubstStmt(clang::Stmt*, clang::MultiLevelTemplateArgumentList const&) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b5fa03)
-#37 0x00007f4a197a1f26 clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1ba1f26)
-#38 0x00007f4a197a4744 clang::Sema::PerformPendingInstantiations(bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1ba4744)
-#39 0x00007f4a197a2029 clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1ba2029)
-#40 0x00007f4a197a4744 clang::Sema::PerformPendingInstantiations(bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1ba4744)
-#41 0x00007f4a18fee90b clang::Sema::ActOnEndOfTranslationUnitFragment(clang::Sema::TUFragmentKind) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x13ee90b)
-#42 0x00007f4a18feef7b clang::Sema::ActOnEndOfTranslationUnit() (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x13eef7b)
-#43 0x00007f4a1885fe2e clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xc5fe2e)
-#44 0x00007f4a1879747e clang::ParseAST(clang::Sema&, bool, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xb9747e)
-#45 0x00007f4a1a60662c clang::FrontendAction::Execute() (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x2a0662c)
-#46 0x00007f4a1a5830b4 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x29830b4)
-#47 0x00007f4a1a68263d clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x2a8263d)
-#48 0x000055f3eaf2042e cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/usr/lib/llvm-18/bin/clang+0x1442e)
-#49 0x000055f3eaf1d894 (/usr/lib/llvm-18/bin/clang+0x11894)
-#50 0x000055f3eaf1ca26 clang_main(int, char**, llvm::ToolContext const&) (/usr/lib/llvm-18/bin/clang+0x10a26)
-#51 0x000055f3eaf2a383 main (/usr/lib/llvm-18/bin/clang+0x1e383)
-#52 0x00007f4a0fc2a1ca (/lib/x86_64-linux-gnu/libc.so.6+0x2a1ca)
-#53 0x00007f4a0fc2a28b __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2a28b)
-#54 0x000055f3eaf1a255 _start (/usr/lib/llvm-18/bin/clang+0xe255)
+ #0 0x00007f4e119a63bf llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xda63bf)
+ #1 0x00007f4e119a44f9 llvm::sys::RunSignalHandlers() (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xda44f9)
+ #2 0x00007f4e119a6b00 (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xda6b00)
+ #3 0x00007f4e10445330 (/lib/x86_64-linux-gnu/libc.so.6+0x45330)
+ #4 0x00007f4e19b18f6a clang::Sema::tryCaptureVariable(clang::ValueDecl*, clang::SourceLocation, clang::Sema::TryCaptureKind, clang::SourceLocation, bool, clang::QualType&, clang::QualType&, unsigned int const*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1718f6a)
+ #5 0x00007f4e19ae10a6 clang::Sema::BuildDeclRefExpr(clang::ValueDecl*, clang::QualType, clang::ExprValueKind, clang::DeclarationNameInfo const&, clang::NestedNameSpecifierLoc, clang::NamedDecl*, clang::SourceLocation, clang::TemplateArgumentListInfo const*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x16e10a6)
+ #6 0x00007f4e19ae1005 clang::Sema::BuildDeclRefExpr(clang::ValueDecl*, clang::QualType, clang::ExprValueKind, clang::DeclarationNameInfo const&, clang::CXXScopeSpec const*, clang::NamedDecl*, clang::SourceLocation, clang::TemplateArgumentListInfo const*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x16e1005)
+ #7 0x00007f4e19ae533c clang::Sema::BuildDeclarationNameExpr(clang::CXXScopeSpec const&, clang::DeclarationNameInfo const&, clang::NamedDecl*, clang::NamedDecl*, clang::TemplateArgumentListInfo const*, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x16e533c)
+ #8 0x00007f4e19f77871 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b77871)
+ #9 0x00007f4e19f7abfb (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b7abfb)
+#10 0x00007f4e19f599c4 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b599c4)
+#11 0x00007f4e19f70a28 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b70a28)
+#12 0x00007f4e19f60341 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b60341)
+#13 0x00007f4e19f6681c (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b6681c)
+#14 0x00007f4e19f6b4b4 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b6b4b4)
+#15 0x00007f4e19f6e08d (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b6e08d)
+#16 0x00007f4e19f6b4b4 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b6b4b4)
+#17 0x00007f4e19f72670 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b72670)
+#18 0x00007f4e19f65c77 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b65c77)
+#19 0x00007f4e19f8645a (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b8645a)
+#20 0x00007f4e19f8449f (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b8449f)
+#21 0x00007f4e19f70669 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b70669)
+#22 0x00007f4e19f5fa03 clang::Sema::SubstStmt(clang::Stmt*, clang::MultiLevelTemplateArgumentList const&) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b5fa03)
+#23 0x00007f4e19fa1f26 clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1ba1f26)
+#24 0x00007f4e197ecde0 clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref<void ()>) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x13ecde0)
+#25 0x00007f4e19f0280e clang::Sema::DeduceReturnType(clang::FunctionDecl*, clang::SourceLocation, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b0280e)
+#26 0x00007f4e19ad6bc9 clang::Sema::DiagnoseUseOfDecl(clang::NamedDecl*, llvm::ArrayRef<clang::SourceLocation>, clang::ObjCInterfaceDecl const*, bool, bool, clang::ObjCInterfaceDecl*, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x16d6bc9)
+#27 0x00007f4e19dde3ce (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x19de3ce)
+#28 0x00007f4e19de5884 clang::Sema::BuildCallToObjectOfClassType(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x19e5884)
+#29 0x00007f4e19adbb7d clang::Sema::BuildCallExpr(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::Expr*, bool, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x16dbb7d)
+#30 0x00007f4e19af60a1 clang::Sema::ActOnCallExpr(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::Expr*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x16f60a1)
+#31 0x00007f4e19f6b65d (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b6b65d)
+#32 0x00007f4e19f6f44e (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b6f44e)
+#33 0x00007f4e19f6f42d (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b6f42d)
+#34 0x00007f4e19f5fa77 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b5fa77)
+#35 0x00007f4e19f70669 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b70669)
+#36 0x00007f4e19f5fa03 clang::Sema::SubstStmt(clang::Stmt*, clang::MultiLevelTemplateArgumentList const&) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b5fa03)
+#37 0x00007f4e19fa1f26 clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1ba1f26)
+#38 0x00007f4e19fa4744 clang::Sema::PerformPendingInstantiations(bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1ba4744)
+#39 0x00007f4e19fa2029 clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1ba2029)
+#40 0x00007f4e19fa4744 clang::Sema::PerformPendingInstantiations(bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1ba4744)
+#41 0x00007f4e197ee90b clang::Sema::ActOnEndOfTranslationUnitFragment(clang::Sema::TUFragmentKind) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x13ee90b)
+#42 0x00007f4e197eef7b clang::Sema::ActOnEndOfTranslationUnit() (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x13eef7b)
+#43 0x00007f4e1905fe2e clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xc5fe2e)
+#44 0x00007f4e18f9747e clang::ParseAST(clang::Sema&, bool, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xb9747e)
+#45 0x00007f4e1ae0662c clang::FrontendAction::Execute() (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x2a0662c)
+#46 0x00007f4e1ad830b4 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x29830b4)
+#47 0x00007f4e1ae8263d clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x2a8263d)
+#48 0x00005651f692c42e cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/usr/lib/llvm-18/bin/clang+0x1442e)
+#49 0x00005651f6929894 (/usr/lib/llvm-18/bin/clang+0x11894)
+#50 0x00005651f6928a26 clang_main(int, char**, llvm::ToolContext const&) (/usr/lib/llvm-18/bin/clang+0x10a26)
+#51 0x00005651f6936383 main (/usr/lib/llvm-18/bin/clang+0x1e383)
+#52 0x00007f4e1042a1ca (/lib/x86_64-linux-gnu/libc.so.6+0x2a1ca)
+#53 0x00007f4e1042a28b __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2a28b)
+#54 0x00005651f6926255 _start (/usr/lib/llvm-18/bin/clang+0xe255)
 clang++-18: error: unable to execute command: Segmentation fault (core dumped)
 clang++-18: error: clang frontend command failed due to signal (use -v to see invocation)
 Ubuntu clang version 18.1.3 (1ubuntu1)
@@ -71,8 +71,8 @@ clang++-18: note: diagnostic msg:
 
 PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
 Preprocessed source(s) and associated run script(s) are located at:
-clang++-18: note: diagnostic msg: /tmp/pure2-regex-general-9097b6.cpp
-clang++-18: note: diagnostic msg: /tmp/pure2-regex-general-9097b6.sh
+clang++-18: note: diagnostic msg: /tmp/pure2-regex-general-de6211.cpp
+clang++-18: note: diagnostic msg: /tmp/pure2-regex-general-de6211.sh
 clang++-18: note: diagnostic msg: 
 
 ********************
diff --git a/regression-tests/test-results/clang-18-c++20/pure2-regex_01_char_matcher.cpp.execution b/regression-tests/test-results/clang-19-c++20/pure2-regex_01_char_matcher.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/pure2-regex_02_ranges.cpp.execution b/regression-tests/test-results/clang-19-c++20/pure2-regex_02_ranges.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/pure2-regex_03_wildcard.cpp.execution b/regression-tests/test-results/clang-19-c++20/pure2-regex_03_wildcard.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/pure2-regex_13_posessive_modifier.cpp.execution b/regression-tests/test-results/clang-19-c++20/pure2-regex_13_posessive_modifier.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/pure2-regex_16_perl_syntax_modifier.cpp.execution b/regression-tests/test-results/clang-19-c++20/pure2-regex_16_perl_syntax_modifier.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/pure2-regex_17_comments.cpp.execution b/regression-tests/test-results/clang-19-c++20/pure2-regex_17_comments.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/pure2-regex_18_branch_reset.cpp.execution b/regression-tests/test-results/clang-19-c++20/pure2-regex_18_branch_reset.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/pure2-regex_19_lookahead.cpp.execution b/regression-tests/test-results/clang-19-c++20/pure2-regex_19_lookahead.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/pure2-regex_21_atomic_patterns.cpp.execution b/regression-tests/test-results/clang-19-c++20/pure2-regex_21_atomic_patterns.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/pure2-repeated-call.cpp.execution b/regression-tests/test-results/clang-19-c++20/pure2-repeated-call.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/pure2-template-parameter-lists.cpp.execution b/regression-tests/test-results/clang-19-c++20/pure2-template-parameter-lists.cpp.execution
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diff --git a/regression-tests/test-results/clang-18-c++20/pure2-type-and-namespace-aliases.cpp.execution b/regression-tests/test-results/clang-19-c++20/pure2-type-and-namespace-aliases.cpp.execution
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new file mode 100644
index 0000000000..1c40c551d5
--- /dev/null
+++ b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-default-arguments.cpp.execution
@@ -0,0 +1,4 @@
+calling: int main(const int, char **)
+012
+a newer compiler
+1, 1, 66
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index 0000000000..e69de29bb2
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diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-raw-string-literal-and-interpolation.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-raw-string-literal-and-interpolation.cpp.execution
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diff --git a/regression-tests/test-results/clang-19-c++23-libcpp/pure2-regex-general.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-regex-general.cpp.execution
new file mode 100644
index 0000000000..c44d084902
--- /dev/null
+++ b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-regex-general.cpp.execution
@@ -0,0 +1,11 @@
+Running tests_01_char_matcher:
+Not full match fails: 0
+Full match is ok:     1
+Search finds at position 1: 1
+Search finds at position 3: 3
+Find all finds at position: 1
+Find all finds at position: 4
+Find all finds at position: 7
+Find all found 3 matched: 3
+Find all finds at position: 2
+Find all found 1 match: 1
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diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-repeated-call.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-repeated-call.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-repeated-call.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-repeated-call.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-requires-clauses.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-requires-clauses.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-requires-clauses.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-requires-clauses.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-return-tuple-operator.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-return-tuple-operator.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-return-tuple-operator.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-return-tuple-operator.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-statement-scope-parameters.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-statement-scope-parameters.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-statement-scope-parameters.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-statement-scope-parameters.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-synthesize-rightshift-and-rightshifteq.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-synthesize-rightshift-and-rightshifteq.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-synthesize-rightshift-and-rightshifteq.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-synthesize-rightshift-and-rightshifteq.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-template-parameter-lists.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-template-parameter-lists.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-template-parameter-lists.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-template-parameter-lists.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-type-and-namespace-aliases.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-type-and-namespace-aliases.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-type-and-namespace-aliases.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-type-and-namespace-aliases.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-type-constraints.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-type-constraints.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-type-constraints.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-type-constraints.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-type-safety-1.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-type-safety-1.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-type-safety-1.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-type-safety-1.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-type-safety-2-with-inspect-expression.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-type-safety-2-with-inspect-expression.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-type-safety-2-with-inspect-expression.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-type-safety-2-with-inspect-expression.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-basics.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-basics.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-basics.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-basics.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-down-upcast.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-down-upcast.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-down-upcast.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-down-upcast.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-inheritance.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-inheritance.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-inheritance.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-inheritance.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-order-independence-and-nesting.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-order-independence-and-nesting.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-order-independence-and-nesting.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-order-independence-and-nesting.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-ordering-via-meta-functions.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-ordering-via-meta-functions.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-ordering-via-meta-functions.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-ordering-via-meta-functions.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-smf-and-that-1-provide-everything.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-smf-and-that-1-provide-everything.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-smf-and-that-1-provide-everything.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-smf-and-that-1-provide-everything.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-that-parameters.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-that-parameters.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-that-parameters.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-that-parameters.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-value-types-via-meta-functions.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-value-types-via-meta-functions.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-types-value-types-via-meta-functions.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-types-value-types-via-meta-functions.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-union.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-union.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-union.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-union.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-unsafe.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-unsafe.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-unsafe.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-unsafe.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/pure2-variadics.cpp.execution b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-variadics.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/pure2-variadics.cpp.execution
rename to regression-tests/test-results/clang-19-c++23-libcpp/pure2-variadics.cpp.execution
diff --git a/regression-tests/test-results/clang-18-c++23-libcpp/xyzzy b/regression-tests/test-results/clang-19-c++23-libcpp/xyzzy
similarity index 100%
rename from regression-tests/test-results/clang-18-c++23-libcpp/xyzzy
rename to regression-tests/test-results/clang-19-c++23-libcpp/xyzzy

From f5ee8d31b04b382cf3a1e2ef92f675a6bd6b85a3 Mon Sep 17 00:00:00 2001
From: jarzec <jarek.glowacki@gmail.com>
Date: Wed, 14 May 2025 22:02:19 +0200
Subject: [PATCH 2/2] CI: Fix pure Cpp2 regression tests for MSVC

---
 include/cpp2util.h                            |   6 +
 .../mixed-bounds-check.cpp.execution          |   2 +-
 ...ed-bounds-safety-with-assert.cpp.execution |   2 +-
 ...-safety-3-contract-violation.cpp.execution |   2 +-
 ...me-safety-and-null-contracts.cpp.execution |   2 +-
 ...re2-assert-expected-not-null.cpp.execution |   2 +-
 ...re2-assert-optional-not-null.cpp.execution |   2 +-
 ...2-assert-shared-ptr-not-null.cpp.execution |   2 +-
 ...2-assert-unique-ptr-not-null.cpp.execution |   2 +-
 .../mixed-bounds-check.cpp.execution          |   2 +-
 ...ed-bounds-safety-with-assert.cpp.execution |   2 +-
 ...-safety-3-contract-violation.cpp.execution |   2 +-
 ...me-safety-and-null-contracts.cpp.execution |   2 +-
 ...re2-assert-optional-not-null.cpp.execution |   2 +-
 ...2-assert-shared-ptr-not-null.cpp.execution |   2 +-
 ...2-assert-unique-ptr-not-null.cpp.execution |   2 +-
 .../pure2-expected-is-as.cpp.output           |  86 ++++----
 .../pure2-assert-expected-not-null.cpp.output |   4 +-
 .../pure2-default-arguments.cpp.execution     |   4 +
 .../pure2-default-arguments.cpp.output        |   7 -
 .../pure2-expected-is-as.cpp.output           | 194 +++++++++---------
 .../pure2-regex-general.cpp.execution         |  11 +
 .../pure2-regex-general.cpp.output            |  78 -------
 ...ction-expression-with-repeated-capture.cpp |  43 ++++
 .../mixed-lifetime-safety-pointer-init-4.cpp  |  57 +++++
 .../pure2-default-arguments.cpp.output        |   0
 .../pure2-assert-expected-not-null.cpp.output |   4 +-
 .../pure2-bugfix-for-late-comments.cpp.output |   1 +
 28 files changed, 281 insertions(+), 244 deletions(-)
 create mode 100644 regression-tests/test-results/clang-19-c++20/pure2-default-arguments.cpp.execution
 delete mode 100644 regression-tests/test-results/clang-19-c++20/pure2-default-arguments.cpp.output
 create mode 100644 regression-tests/test-results/clang-19-c++20/pure2-regex-general.cpp.execution
 delete mode 100644 regression-tests/test-results/clang-19-c++20/pure2-regex-general.cpp.output
 create mode 100644 regression-tests/test-results/clang-19-c++23-libcpp/mixed-function-expression-with-repeated-capture.cpp
 create mode 100644 regression-tests/test-results/clang-19-c++23-libcpp/mixed-lifetime-safety-pointer-init-4.cpp
 delete mode 100644 regression-tests/test-results/clang-19-c++23-libcpp/pure2-default-arguments.cpp.output
 create mode 100644 regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-late-comments.cpp.output

diff --git a/include/cpp2util.h b/include/cpp2util.h
index 9815f23d49..d13c8573b5 100644
--- a/include/cpp2util.h
+++ b/include/cpp2util.h
@@ -301,6 +301,12 @@
     #include <vector>
 #endif
 
+// Required for pure Cpp2 tests to pass on MSVC
+// #include <cstdlib> causes C2995 of math tempaltes
+#ifndef EXIT_FAILURE
+    #define EXIT_FAILURE 1
+#endif
+
 //  cpp2util.h uses signed integer types for indices and container sizes
 //  so disable clang signed-to-unsigned conversion warnings in this header.
 #ifdef __clang__
diff --git a/regression-tests/test-results/apple-clang-15-c++2b/mixed-bounds-check.cpp.execution b/regression-tests/test-results/apple-clang-15-c++2b/mixed-bounds-check.cpp.execution
index 3a3b2c0b7d..f070a5bf56 100644
--- a/regression-tests/test-results/apple-clang-15-c++2b/mixed-bounds-check.cpp.execution
+++ b/regression-tests/test-results/apple-clang-15-c++2b/mixed-bounds-check.cpp.execution
@@ -1 +1 @@
-../../../include/cpp2util.h(1235) decltype(auto) cpp2::impl::assert_in_bounds(auto &&, std::source_location) [arg = 5, x:auto = std::vector<int>]: Bounds safety violation: out of bounds access attempt detected - attempted access at index 5, [min,max] range is [0,4]
+../../../include/cpp2util.h(1241) decltype(auto) cpp2::impl::assert_in_bounds(auto &&, std::source_location) [arg = 5, x:auto = std::vector<int>]: Bounds safety violation: out of bounds access attempt detected - attempted access at index 5, [min,max] range is [0,4]
diff --git a/regression-tests/test-results/apple-clang-15-c++2b/mixed-bounds-safety-with-assert.cpp.execution b/regression-tests/test-results/apple-clang-15-c++2b/mixed-bounds-safety-with-assert.cpp.execution
index 8ffc60ff34..5b15e6b713 100644
--- a/regression-tests/test-results/apple-clang-15-c++2b/mixed-bounds-safety-with-assert.cpp.execution
+++ b/regression-tests/test-results/apple-clang-15-c++2b/mixed-bounds-safety-with-assert.cpp.execution
@@ -1 +1 @@
-../../../include/cpp2util.h(546) : Bounds safety violation
+../../../include/cpp2util.h(552) : Bounds safety violation
diff --git a/regression-tests/test-results/apple-clang-15-c++2b/mixed-initialization-safety-3-contract-violation.cpp.execution b/regression-tests/test-results/apple-clang-15-c++2b/mixed-initialization-safety-3-contract-violation.cpp.execution
index f9c4f143cd..9509646ac2 100644
--- a/regression-tests/test-results/apple-clang-15-c++2b/mixed-initialization-safety-3-contract-violation.cpp.execution
+++ b/regression-tests/test-results/apple-clang-15-c++2b/mixed-initialization-safety-3-contract-violation.cpp.execution
@@ -1 +1 @@
-../../../include/cpp2util.h(546) : Contract violation: fill: value must contain at least count elements
+../../../include/cpp2util.h(552) : Contract violation: fill: value must contain at least count elements
diff --git a/regression-tests/test-results/apple-clang-15-c++2b/mixed-lifetime-safety-and-null-contracts.cpp.execution b/regression-tests/test-results/apple-clang-15-c++2b/mixed-lifetime-safety-and-null-contracts.cpp.execution
index f41e173fb6..d427d11db6 100644
--- a/regression-tests/test-results/apple-clang-15-c++2b/mixed-lifetime-safety-and-null-contracts.cpp.execution
+++ b/regression-tests/test-results/apple-clang-15-c++2b/mixed-lifetime-safety-and-null-contracts.cpp.execution
@@ -1,2 +1,2 @@
 sending error to my framework... [dynamic null dereference attempt detected]
-from source location: ../../../include/cpp2util.h(1126) decltype(auto) cpp2::impl::assert_not_null(auto &&, std::source_location) [arg:auto = int *&]
+from source location: ../../../include/cpp2util.h(1132) decltype(auto) cpp2::impl::assert_not_null(auto &&, std::source_location) [arg:auto = int *&]
diff --git a/regression-tests/test-results/apple-clang-15-c++2b/pure2-assert-expected-not-null.cpp.execution b/regression-tests/test-results/apple-clang-15-c++2b/pure2-assert-expected-not-null.cpp.execution
index 6427da0635..de5632b3de 100644
--- a/regression-tests/test-results/apple-clang-15-c++2b/pure2-assert-expected-not-null.cpp.execution
+++ b/regression-tests/test-results/apple-clang-15-c++2b/pure2-assert-expected-not-null.cpp.execution
@@ -1 +1 @@
-../../../include/cpp2util.h(1126) decltype(auto) cpp2::impl::assert_not_null(auto &&, std::source_location) [arg:auto = std::expected<int, bool>]: Null safety violation: std::expected has an unexpected value
+../../../include/cpp2util.h(1132) decltype(auto) cpp2::impl::assert_not_null(auto &&, std::source_location) [arg:auto = std::expected<int, bool>]: Null safety violation: std::expected has an unexpected value
diff --git a/regression-tests/test-results/apple-clang-15-c++2b/pure2-assert-optional-not-null.cpp.execution b/regression-tests/test-results/apple-clang-15-c++2b/pure2-assert-optional-not-null.cpp.execution
index 34a7e1af0a..ae535f70cc 100644
--- a/regression-tests/test-results/apple-clang-15-c++2b/pure2-assert-optional-not-null.cpp.execution
+++ b/regression-tests/test-results/apple-clang-15-c++2b/pure2-assert-optional-not-null.cpp.execution
@@ -1 +1 @@
-../../../include/cpp2util.h(1126) decltype(auto) cpp2::impl::assert_not_null(auto &&, std::source_location) [arg:auto = std::optional<int>]: Null safety violation: std::optional does not contain a value
+../../../include/cpp2util.h(1132) decltype(auto) cpp2::impl::assert_not_null(auto &&, std::source_location) [arg:auto = std::optional<int>]: Null safety violation: std::optional does not contain a value
diff --git a/regression-tests/test-results/apple-clang-15-c++2b/pure2-assert-shared-ptr-not-null.cpp.execution b/regression-tests/test-results/apple-clang-15-c++2b/pure2-assert-shared-ptr-not-null.cpp.execution
index 4c2e845abe..2040bb090a 100644
--- a/regression-tests/test-results/apple-clang-15-c++2b/pure2-assert-shared-ptr-not-null.cpp.execution
+++ b/regression-tests/test-results/apple-clang-15-c++2b/pure2-assert-shared-ptr-not-null.cpp.execution
@@ -1 +1 @@
-../../../include/cpp2util.h(1126) decltype(auto) cpp2::impl::assert_not_null(auto &&, std::source_location) [arg:auto = std::shared_ptr<int>]: Null safety violation: std::shared_ptr is empty
+../../../include/cpp2util.h(1132) decltype(auto) cpp2::impl::assert_not_null(auto &&, std::source_location) [arg:auto = std::shared_ptr<int>]: Null safety violation: std::shared_ptr is empty
diff --git a/regression-tests/test-results/apple-clang-15-c++2b/pure2-assert-unique-ptr-not-null.cpp.execution b/regression-tests/test-results/apple-clang-15-c++2b/pure2-assert-unique-ptr-not-null.cpp.execution
index 12e5bb1d9d..6ef773f34c 100644
--- a/regression-tests/test-results/apple-clang-15-c++2b/pure2-assert-unique-ptr-not-null.cpp.execution
+++ b/regression-tests/test-results/apple-clang-15-c++2b/pure2-assert-unique-ptr-not-null.cpp.execution
@@ -1 +1 @@
-../../../include/cpp2util.h(1126) decltype(auto) cpp2::impl::assert_not_null(auto &&, std::source_location) [arg:auto = std::unique_ptr<int>]: Null safety violation: std::unique_ptr is empty
+../../../include/cpp2util.h(1132) decltype(auto) cpp2::impl::assert_not_null(auto &&, std::source_location) [arg:auto = std::unique_ptr<int>]: Null safety violation: std::unique_ptr is empty
diff --git a/regression-tests/test-results/clang-15-c++20/mixed-bounds-check.cpp.execution b/regression-tests/test-results/clang-15-c++20/mixed-bounds-check.cpp.execution
index 3a3b2c0b7d..f070a5bf56 100644
--- a/regression-tests/test-results/clang-15-c++20/mixed-bounds-check.cpp.execution
+++ b/regression-tests/test-results/clang-15-c++20/mixed-bounds-check.cpp.execution
@@ -1 +1 @@
-../../../include/cpp2util.h(1235) decltype(auto) cpp2::impl::assert_in_bounds(auto &&, std::source_location) [arg = 5, x:auto = std::vector<int>]: Bounds safety violation: out of bounds access attempt detected - attempted access at index 5, [min,max] range is [0,4]
+../../../include/cpp2util.h(1241) decltype(auto) cpp2::impl::assert_in_bounds(auto &&, std::source_location) [arg = 5, x:auto = std::vector<int>]: Bounds safety violation: out of bounds access attempt detected - attempted access at index 5, [min,max] range is [0,4]
diff --git a/regression-tests/test-results/clang-15-c++20/mixed-bounds-safety-with-assert.cpp.execution b/regression-tests/test-results/clang-15-c++20/mixed-bounds-safety-with-assert.cpp.execution
index 8ffc60ff34..5b15e6b713 100644
--- a/regression-tests/test-results/clang-15-c++20/mixed-bounds-safety-with-assert.cpp.execution
+++ b/regression-tests/test-results/clang-15-c++20/mixed-bounds-safety-with-assert.cpp.execution
@@ -1 +1 @@
-../../../include/cpp2util.h(546) : Bounds safety violation
+../../../include/cpp2util.h(552) : Bounds safety violation
diff --git a/regression-tests/test-results/clang-15-c++20/mixed-initialization-safety-3-contract-violation.cpp.execution b/regression-tests/test-results/clang-15-c++20/mixed-initialization-safety-3-contract-violation.cpp.execution
index f9c4f143cd..9509646ac2 100644
--- a/regression-tests/test-results/clang-15-c++20/mixed-initialization-safety-3-contract-violation.cpp.execution
+++ b/regression-tests/test-results/clang-15-c++20/mixed-initialization-safety-3-contract-violation.cpp.execution
@@ -1 +1 @@
-../../../include/cpp2util.h(546) : Contract violation: fill: value must contain at least count elements
+../../../include/cpp2util.h(552) : Contract violation: fill: value must contain at least count elements
diff --git a/regression-tests/test-results/clang-15-c++20/mixed-lifetime-safety-and-null-contracts.cpp.execution b/regression-tests/test-results/clang-15-c++20/mixed-lifetime-safety-and-null-contracts.cpp.execution
index f41e173fb6..d427d11db6 100644
--- a/regression-tests/test-results/clang-15-c++20/mixed-lifetime-safety-and-null-contracts.cpp.execution
+++ b/regression-tests/test-results/clang-15-c++20/mixed-lifetime-safety-and-null-contracts.cpp.execution
@@ -1,2 +1,2 @@
 sending error to my framework... [dynamic null dereference attempt detected]
-from source location: ../../../include/cpp2util.h(1126) decltype(auto) cpp2::impl::assert_not_null(auto &&, std::source_location) [arg:auto = int *&]
+from source location: ../../../include/cpp2util.h(1132) decltype(auto) cpp2::impl::assert_not_null(auto &&, std::source_location) [arg:auto = int *&]
diff --git a/regression-tests/test-results/clang-15-c++20/pure2-assert-optional-not-null.cpp.execution b/regression-tests/test-results/clang-15-c++20/pure2-assert-optional-not-null.cpp.execution
index 34a7e1af0a..ae535f70cc 100644
--- a/regression-tests/test-results/clang-15-c++20/pure2-assert-optional-not-null.cpp.execution
+++ b/regression-tests/test-results/clang-15-c++20/pure2-assert-optional-not-null.cpp.execution
@@ -1 +1 @@
-../../../include/cpp2util.h(1126) decltype(auto) cpp2::impl::assert_not_null(auto &&, std::source_location) [arg:auto = std::optional<int>]: Null safety violation: std::optional does not contain a value
+../../../include/cpp2util.h(1132) decltype(auto) cpp2::impl::assert_not_null(auto &&, std::source_location) [arg:auto = std::optional<int>]: Null safety violation: std::optional does not contain a value
diff --git a/regression-tests/test-results/clang-15-c++20/pure2-assert-shared-ptr-not-null.cpp.execution b/regression-tests/test-results/clang-15-c++20/pure2-assert-shared-ptr-not-null.cpp.execution
index 4c2e845abe..2040bb090a 100644
--- a/regression-tests/test-results/clang-15-c++20/pure2-assert-shared-ptr-not-null.cpp.execution
+++ b/regression-tests/test-results/clang-15-c++20/pure2-assert-shared-ptr-not-null.cpp.execution
@@ -1 +1 @@
-../../../include/cpp2util.h(1126) decltype(auto) cpp2::impl::assert_not_null(auto &&, std::source_location) [arg:auto = std::shared_ptr<int>]: Null safety violation: std::shared_ptr is empty
+../../../include/cpp2util.h(1132) decltype(auto) cpp2::impl::assert_not_null(auto &&, std::source_location) [arg:auto = std::shared_ptr<int>]: Null safety violation: std::shared_ptr is empty
diff --git a/regression-tests/test-results/clang-15-c++20/pure2-assert-unique-ptr-not-null.cpp.execution b/regression-tests/test-results/clang-15-c++20/pure2-assert-unique-ptr-not-null.cpp.execution
index 12e5bb1d9d..6ef773f34c 100644
--- a/regression-tests/test-results/clang-15-c++20/pure2-assert-unique-ptr-not-null.cpp.execution
+++ b/regression-tests/test-results/clang-15-c++20/pure2-assert-unique-ptr-not-null.cpp.execution
@@ -1 +1 @@
-../../../include/cpp2util.h(1126) decltype(auto) cpp2::impl::assert_not_null(auto &&, std::source_location) [arg:auto = std::unique_ptr<int>]: Null safety violation: std::unique_ptr is empty
+../../../include/cpp2util.h(1132) decltype(auto) cpp2::impl::assert_not_null(auto &&, std::source_location) [arg:auto = std::unique_ptr<int>]: Null safety violation: std::unique_ptr is empty
diff --git a/regression-tests/test-results/clang-15-c++20/pure2-expected-is-as.cpp.output b/regression-tests/test-results/clang-15-c++20/pure2-expected-is-as.cpp.output
index c850495ea8..7a5835498e 100644
--- a/regression-tests/test-results/clang-15-c++20/pure2-expected-is-as.cpp.output
+++ b/regression-tests/test-results/clang-15-c++20/pure2-expected-is-as.cpp.output
@@ -89,66 +89,66 @@ pure2-expected-is-as.cpp2:34:24: error: use of undeclared identifier 'ex1'; did
 __MATHCALL_VEC (exp,, (_Mdouble_ __x));
                 ^
 In file included from pure2-expected-is-as.cpp:7:
-../../../include/cpp2util.h:469:72: error: invalid application of 'sizeof' to a function type
+../../../include/cpp2util.h:475:72: error: invalid application of 'sizeof' to a function type
     (std::is_floating_point_v<From> && std::is_floating_point_v<To> && sizeof(From) > sizeof(To)) || // NOLINT(misc-redundant-expression)
                                                                        ^~~~~~~~~~~~
-../../../include/cpp2util.h:2923:19: note: in instantiation of variable template specialization 'cpp2::impl::is_narrowing_v' requested here
+../../../include/cpp2util.h:2929:19: note: in instantiation of variable template specialization 'cpp2::impl::is_narrowing_v' requested here
     if constexpr (is_narrowing_v<C, CPP2_TYPEOF(x)>) {
                   ^
 pure2-expected-is-as.cpp2:39:28: note: in instantiation of function template specialization 'cpp2::impl::as_<int, double (&)(double) noexcept>' requested here
     auto val1 {cpp2::impl::as_<int>(ex1)}; 
                            ^
 In file included from pure2-expected-is-as.cpp:7:
-../../../include/cpp2util.h:2924:9: error: static assertion failed due to requirement 'program_violates_type_safety_guarantee<int, double (double) noexcept>': 'as' does not allow unsafe possibly-lossy narrowing conversions - if you're sure you want this, use 'unchecked_narrow<T>' to explicitly force the conversion and possibly lose information
+../../../include/cpp2util.h:2930:9: error: static assertion failed due to requirement 'program_violates_type_safety_guarantee<int, double (double) noexcept>': 'as' does not allow unsafe possibly-lossy narrowing conversions - if you're sure you want this, use 'unchecked_narrow<T>' to explicitly force the conversion and possibly lose information
         static_assert(
         ^
 pure2-expected-is-as.cpp2:39:28: note: in instantiation of function template specialization 'cpp2::impl::as_<int, double (&)(double) noexcept>' requested here
     auto val1 {cpp2::impl::as_<int>(ex1)}; 
                            ^
 In file included from pure2-expected-is-as.cpp:7:
-../../../include/cpp2util.h:2936:52: error: no matching function for call to 'as'
+../../../include/cpp2util.h:2942:52: error: no matching function for call to 'as'
     else if constexpr( std::is_same_v< CPP2_TYPEOF(as<C>(CPP2_FORWARD(x))), nonesuch_ > ) {
                                                    ^~~~~
-../../../include/cpp2util.h:317:66: note: expanded from macro 'CPP2_TYPEOF'
+../../../include/cpp2util.h:323:66: note: expanded from macro 'CPP2_TYPEOF'
 #define CPP2_TYPEOF(x)              std::remove_cvref_t<decltype(x)>
                                                                  ^
-../../../include/cpp2util.h:1901:16: note: candidate template ignored: constraints not satisfied [with C = int, x:auto = double (&)(double) noexcept]
+../../../include/cpp2util.h:1907:16: note: candidate template ignored: constraints not satisfied [with C = int, x:auto = double (&)(double) noexcept]
 constexpr auto as(auto&& x CPP2_SOURCE_LOCATION_PARAM_WITH_DEFAULT_AS) -> decltype(auto)
                ^
-../../../include/cpp2util.h:1907:18: note: because 'std::is_scalar_v<std::remove_cvref_t<decltype(x)> >' evaluated to false
+../../../include/cpp2util.h:1913:18: note: because 'std::is_scalar_v<std::remove_cvref_t<decltype(x)> >' evaluated to false
                 (std::is_scalar_v<CPP2_TYPEOF(x)> && !std::is_enum_v<CPP2_TYPEOF(x)>)
                  ^
-../../../include/cpp2util.h:1908:17: note: and 'std::is_floating_point_v<std::remove_cvref_t<decltype(x)> >' evaluated to false
+../../../include/cpp2util.h:1914:17: note: and 'std::is_floating_point_v<std::remove_cvref_t<decltype(x)> >' evaluated to false
             ||  std::is_floating_point_v<CPP2_TYPEOF(x)>
                 ^
-../../../include/cpp2util.h:1909:17: note: and 'std::is_base_of_v<int, std::remove_cvref_t<decltype(x)> >' evaluated to false
+../../../include/cpp2util.h:1915:17: note: and 'std::is_base_of_v<int, std::remove_cvref_t<decltype(x)> >' evaluated to false
             ||  std::is_base_of_v<C, CPP2_TYPEOF(x)>
                 ^
-../../../include/cpp2util.h:1910:17: note: and 'std::is_base_of_v<std::remove_cvref_t<decltype(x)>, int>' evaluated to false
+../../../include/cpp2util.h:1916:17: note: and 'std::is_base_of_v<std::remove_cvref_t<decltype(x)>, int>' evaluated to false
             ||  std::is_base_of_v<CPP2_TYPEOF(x), C>
                 ^
-../../../include/cpp2util.h:1911:30: note: and 'C{std::forward<decltype(x)>(x)}' would be invalid: cannot initialize a value of type 'int' with an lvalue of type 'double (double) noexcept'
+../../../include/cpp2util.h:1917:30: note: and 'C{std::forward<decltype(x)>(x)}' would be invalid: cannot initialize a value of type 'int' with an lvalue of type 'double (double) noexcept'
             ||  requires { C{CPP2_FORWARD(x)}; }
                              ^
-../../../include/cpp2util.h:327:37: note: expanded from macro 'CPP2_FORWARD'
+../../../include/cpp2util.h:333:37: note: expanded from macro 'CPP2_FORWARD'
 #define CPP2_FORWARD(x)             std::forward<decltype(x)>(x)
                                     ^
-../../../include/cpp2util.h:2040:6: note: candidate template ignored: constraints not satisfied [with C = int, X = double (&)(double) noexcept]
+../../../include/cpp2util.h:2046:6: note: candidate template ignored: constraints not satisfied [with C = int, X = double (&)(double) noexcept]
 auto as(X&& x CPP2_SOURCE_LOCATION_PARAM_WITH_DEFAULT_AS) -> decltype(auto)
      ^
-../../../include/cpp2util.h:2039:23: note: because 'specialization_of_template<double (&)(double) noexcept, std::variant>' evaluated to false
+../../../include/cpp2util.h:2045:23: note: because 'specialization_of_template<double (&)(double) noexcept, std::variant>' evaluated to false
 template< typename C, specialization_of_template<std::variant> X >
                       ^
-../../../include/cpp2util.h:891:7: note: because 'specialization_of_template_helper<C>(std::forward<X>(x))' would be invalid: no matching function for call to 'specialization_of_template_helper'
+../../../include/cpp2util.h:897:7: note: because 'specialization_of_template_helper<C>(std::forward<X>(x))' would be invalid: no matching function for call to 'specialization_of_template_helper'
     { specialization_of_template_helper<C>(std::forward<X>(x)) } -> std::same_as<std::true_type>;
       ^
-../../../include/cpp2util.h:2087:16: note: candidate template ignored: constraints not satisfied [with T = int, X = double (&)(double) noexcept]
+../../../include/cpp2util.h:2093:16: note: candidate template ignored: constraints not satisfied [with T = int, X = double (&)(double) noexcept]
 constexpr auto as( X && x ) -> decltype(auto) {
                ^
-../../../include/cpp2util.h:2086:22: note: because 'same_type_as<double (&)(double) noexcept, std::any>' evaluated to false
+../../../include/cpp2util.h:2092:22: note: because 'same_type_as<double (&)(double) noexcept, std::any>' evaluated to false
 template<typename T, same_type_as<std::any> X>
                      ^
-../../../include/cpp2util.h:921:24: note: because 'std::same_as<std::remove_cvref_t<double (&)(double) noexcept>, std::remove_cvref_t<any> >' evaluated to false
+../../../include/cpp2util.h:927:24: note: because 'std::same_as<std::remove_cvref_t<double (&)(double) noexcept>, std::remove_cvref_t<any> >' evaluated to false
 concept same_type_as = std::same_as<std::remove_cvref_t<X>, std::remove_cvref_t<C>>;
                        ^
 /usr/bin/../lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/concepts:63:9: note: because '__detail::__same_as<double (double) noexcept, std::any>' evaluated to false
@@ -157,64 +157,64 @@ concept same_type_as = std::same_as<std::remove_cvref_t<X>, std::remove_cvref_t<
 /usr/bin/../lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/concepts:57:27: note: because 'std::is_same_v<double (double) noexcept, std::any>' evaluated to false
       concept __same_as = std::is_same_v<_Tp, _Up>;
                           ^
-../../../include/cpp2util.h:2130:16: note: candidate template ignored: constraints not satisfied [with T = int, X = double (&)(double) noexcept]
+../../../include/cpp2util.h:2136:16: note: candidate template ignored: constraints not satisfied [with T = int, X = double (&)(double) noexcept]
 constexpr auto as( X&& x ) -> decltype(auto) { 
                ^
-../../../include/cpp2util.h:2129:22: note: because 'specialization_of_template<double (&)(double) noexcept, std::optional>' evaluated to false
+../../../include/cpp2util.h:2135:22: note: because 'specialization_of_template<double (&)(double) noexcept, std::optional>' evaluated to false
 template<typename T, specialization_of_template<std::optional> X>
                      ^
-../../../include/cpp2util.h:891:7: note: because 'specialization_of_template_helper<C>(std::forward<X>(x))' would be invalid: no matching function for call to 'specialization_of_template_helper'
+../../../include/cpp2util.h:897:7: note: because 'specialization_of_template_helper<C>(std::forward<X>(x))' would be invalid: no matching function for call to 'specialization_of_template_helper'
     { specialization_of_template_helper<C>(std::forward<X>(x)) } -> std::same_as<std::true_type>;
       ^
-../../../include/cpp2util.h:1876:16: note: candidate function template not viable: requires 0 arguments, but 1 was provided
+../../../include/cpp2util.h:1882:16: note: candidate function template not viable: requires 0 arguments, but 1 was provided
 constexpr auto as() -> auto
                ^
-../../../include/cpp2util.h:1887:16: note: candidate function template not viable: requires 0 arguments, but 1 was provided
+../../../include/cpp2util.h:1893:16: note: candidate function template not viable: requires 0 arguments, but 1 was provided
 constexpr auto as() -> auto
                ^
-../../../include/cpp2util.h:2937:9: error: static assertion failed due to requirement 'program_violates_type_safety_guarantee<int, double (double) noexcept>': No safe 'as' cast available - please check your cast
+../../../include/cpp2util.h:2943:9: error: static assertion failed due to requirement 'program_violates_type_safety_guarantee<int, double (double) noexcept>': No safe 'as' cast available - please check your cast
         static_assert(
         ^
-../../../include/cpp2util.h:2943:12: error: no matching function for call to 'as'
+../../../include/cpp2util.h:2949:12: error: no matching function for call to 'as'
     return as<C>(CPP2_FORWARD(x));
            ^~~~~
-../../../include/cpp2util.h:1901:16: note: candidate template ignored: constraints not satisfied [with C = int, x:auto = double (&)(double) noexcept]
+../../../include/cpp2util.h:1907:16: note: candidate template ignored: constraints not satisfied [with C = int, x:auto = double (&)(double) noexcept]
 constexpr auto as(auto&& x CPP2_SOURCE_LOCATION_PARAM_WITH_DEFAULT_AS) -> decltype(auto)
                ^
-../../../include/cpp2util.h:1907:18: note: because 'std::is_scalar_v<std::remove_cvref_t<decltype(x)> >' evaluated to false
+../../../include/cpp2util.h:1913:18: note: because 'std::is_scalar_v<std::remove_cvref_t<decltype(x)> >' evaluated to false
                 (std::is_scalar_v<CPP2_TYPEOF(x)> && !std::is_enum_v<CPP2_TYPEOF(x)>)
                  ^
-../../../include/cpp2util.h:1908:17: note: and 'std::is_floating_point_v<std::remove_cvref_t<decltype(x)> >' evaluated to false
+../../../include/cpp2util.h:1914:17: note: and 'std::is_floating_point_v<std::remove_cvref_t<decltype(x)> >' evaluated to false
             ||  std::is_floating_point_v<CPP2_TYPEOF(x)>
                 ^
-../../../include/cpp2util.h:1909:17: note: and 'std::is_base_of_v<int, std::remove_cvref_t<decltype(x)> >' evaluated to false
+../../../include/cpp2util.h:1915:17: note: and 'std::is_base_of_v<int, std::remove_cvref_t<decltype(x)> >' evaluated to false
             ||  std::is_base_of_v<C, CPP2_TYPEOF(x)>
                 ^
-../../../include/cpp2util.h:1910:17: note: and 'std::is_base_of_v<std::remove_cvref_t<decltype(x)>, int>' evaluated to false
+../../../include/cpp2util.h:1916:17: note: and 'std::is_base_of_v<std::remove_cvref_t<decltype(x)>, int>' evaluated to false
             ||  std::is_base_of_v<CPP2_TYPEOF(x), C>
                 ^
-../../../include/cpp2util.h:1911:30: note: and 'C{std::forward<decltype(x)>(x)}' would be invalid: cannot initialize a value of type 'int' with an lvalue of type 'double (double) noexcept'
+../../../include/cpp2util.h:1917:30: note: and 'C{std::forward<decltype(x)>(x)}' would be invalid: cannot initialize a value of type 'int' with an lvalue of type 'double (double) noexcept'
             ||  requires { C{CPP2_FORWARD(x)}; }
                              ^
-../../../include/cpp2util.h:327:37: note: expanded from macro 'CPP2_FORWARD'
+../../../include/cpp2util.h:333:37: note: expanded from macro 'CPP2_FORWARD'
 #define CPP2_FORWARD(x)             std::forward<decltype(x)>(x)
                                     ^
-../../../include/cpp2util.h:2040:6: note: candidate template ignored: constraints not satisfied [with C = int, X = double (&)(double) noexcept]
+../../../include/cpp2util.h:2046:6: note: candidate template ignored: constraints not satisfied [with C = int, X = double (&)(double) noexcept]
 auto as(X&& x CPP2_SOURCE_LOCATION_PARAM_WITH_DEFAULT_AS) -> decltype(auto)
      ^
-../../../include/cpp2util.h:2039:23: note: because 'specialization_of_template<double (&)(double) noexcept, std::variant>' evaluated to false
+../../../include/cpp2util.h:2045:23: note: because 'specialization_of_template<double (&)(double) noexcept, std::variant>' evaluated to false
 template< typename C, specialization_of_template<std::variant> X >
                       ^
-../../../include/cpp2util.h:891:7: note: because 'specialization_of_template_helper<C>(std::forward<X>(x))' would be invalid: no matching function for call to 'specialization_of_template_helper'
+../../../include/cpp2util.h:897:7: note: because 'specialization_of_template_helper<C>(std::forward<X>(x))' would be invalid: no matching function for call to 'specialization_of_template_helper'
     { specialization_of_template_helper<C>(std::forward<X>(x)) } -> std::same_as<std::true_type>;
       ^
-../../../include/cpp2util.h:2087:16: note: candidate template ignored: constraints not satisfied [with T = int, X = double (&)(double) noexcept]
+../../../include/cpp2util.h:2093:16: note: candidate template ignored: constraints not satisfied [with T = int, X = double (&)(double) noexcept]
 constexpr auto as( X && x ) -> decltype(auto) {
                ^
-../../../include/cpp2util.h:2086:22: note: because 'same_type_as<double (&)(double) noexcept, std::any>' evaluated to false
+../../../include/cpp2util.h:2092:22: note: because 'same_type_as<double (&)(double) noexcept, std::any>' evaluated to false
 template<typename T, same_type_as<std::any> X>
                      ^
-../../../include/cpp2util.h:921:24: note: because 'std::same_as<std::remove_cvref_t<double (&)(double) noexcept>, std::remove_cvref_t<any> >' evaluated to false
+../../../include/cpp2util.h:927:24: note: because 'std::same_as<std::remove_cvref_t<double (&)(double) noexcept>, std::remove_cvref_t<any> >' evaluated to false
 concept same_type_as = std::same_as<std::remove_cvref_t<X>, std::remove_cvref_t<C>>;
                        ^
 /usr/bin/../lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/concepts:63:9: note: because '__detail::__same_as<double (double) noexcept, std::any>' evaluated to false
@@ -223,19 +223,19 @@ concept same_type_as = std::same_as<std::remove_cvref_t<X>, std::remove_cvref_t<
 /usr/bin/../lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/concepts:57:27: note: because 'std::is_same_v<double (double) noexcept, std::any>' evaluated to false
       concept __same_as = std::is_same_v<_Tp, _Up>;
                           ^
-../../../include/cpp2util.h:2130:16: note: candidate template ignored: constraints not satisfied [with T = int, X = double (&)(double) noexcept]
+../../../include/cpp2util.h:2136:16: note: candidate template ignored: constraints not satisfied [with T = int, X = double (&)(double) noexcept]
 constexpr auto as( X&& x ) -> decltype(auto) { 
                ^
-../../../include/cpp2util.h:2129:22: note: because 'specialization_of_template<double (&)(double) noexcept, std::optional>' evaluated to false
+../../../include/cpp2util.h:2135:22: note: because 'specialization_of_template<double (&)(double) noexcept, std::optional>' evaluated to false
 template<typename T, specialization_of_template<std::optional> X>
                      ^
-../../../include/cpp2util.h:891:7: note: because 'specialization_of_template_helper<C>(std::forward<X>(x))' would be invalid: no matching function for call to 'specialization_of_template_helper'
+../../../include/cpp2util.h:897:7: note: because 'specialization_of_template_helper<C>(std::forward<X>(x))' would be invalid: no matching function for call to 'specialization_of_template_helper'
     { specialization_of_template_helper<C>(std::forward<X>(x)) } -> std::same_as<std::true_type>;
       ^
-../../../include/cpp2util.h:1876:16: note: candidate function template not viable: requires 0 arguments, but 1 was provided
+../../../include/cpp2util.h:1882:16: note: candidate function template not viable: requires 0 arguments, but 1 was provided
 constexpr auto as() -> auto
                ^
-../../../include/cpp2util.h:1887:16: note: candidate function template not viable: requires 0 arguments, but 1 was provided
+../../../include/cpp2util.h:1893:16: note: candidate function template not viable: requires 0 arguments, but 1 was provided
 constexpr auto as() -> auto
                ^
 pure2-expected-is-as.cpp2:39:37: error: use of undeclared identifier 'ex1'
diff --git a/regression-tests/test-results/clang-19-c++20/pure2-assert-expected-not-null.cpp.output b/regression-tests/test-results/clang-19-c++20/pure2-assert-expected-not-null.cpp.output
index ba14d38487..3ac2f431e6 100644
--- a/regression-tests/test-results/clang-19-c++20/pure2-assert-expected-not-null.cpp.output
+++ b/regression-tests/test-results/clang-19-c++20/pure2-assert-expected-not-null.cpp.output
@@ -5,7 +5,7 @@ pure2-assert-expected-not-null.cpp2:7:10: error: no member named 'expected' in n
     7 |     std::expected<int,bool> ex {4}; 
       |     ~~~~~^~~~~~~~
       |          unexpected
-/usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/exception:110:8: note: 'unexpected' declared here
+/usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/exception:110:8: note: 'unexpected' declared here
   110 |   void unexpected() __attribute__ ((__noreturn__,__cold__));
       |        ^
 pure2-assert-expected-not-null.cpp2:9:193: error: use of undeclared identifier 'ex'
@@ -18,7 +18,7 @@ pure2-assert-expected-not-null.cpp2:14:10: error: no member named 'expected' in
    14 |     std::expected<int,bool> ex {std::unexpected(false)}; 
       |     ~~~~~^~~~~~~~
       |          unexpected
-/usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/exception:110:8: note: 'unexpected' declared here
+/usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/exception:110:8: note: 'unexpected' declared here
   110 |   void unexpected() __attribute__ ((__noreturn__,__cold__));
       |        ^
 pure2-assert-expected-not-null.cpp2:15:52: error: use of undeclared identifier 'ex'
diff --git a/regression-tests/test-results/clang-19-c++20/pure2-default-arguments.cpp.execution b/regression-tests/test-results/clang-19-c++20/pure2-default-arguments.cpp.execution
new file mode 100644
index 0000000000..1c40c551d5
--- /dev/null
+++ b/regression-tests/test-results/clang-19-c++20/pure2-default-arguments.cpp.execution
@@ -0,0 +1,4 @@
+calling: int main(const int, char **)
+012
+a newer compiler
+1, 1, 66
diff --git a/regression-tests/test-results/clang-19-c++20/pure2-default-arguments.cpp.output b/regression-tests/test-results/clang-19-c++20/pure2-default-arguments.cpp.output
deleted file mode 100644
index ba1cda5993..0000000000
--- a/regression-tests/test-results/clang-19-c++20/pure2-default-arguments.cpp.output
+++ /dev/null
@@ -1,7 +0,0 @@
-pure2-default-arguments.cpp2:6:56: error: cannot take address of consteval function 'current' outside of an immediate invocation
-    6 |     char const* fn = CPP2_UFCS_NONLOCAL(function_name)(std::source_location::current())
-      |                                                        ^
-/usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/source_location:60:5: note: declared here
-   60 |     current(__builtin_ret_type __p = __builtin_source_location()) noexcept
-      |     ^
-1 error generated.
diff --git a/regression-tests/test-results/clang-19-c++20/pure2-expected-is-as.cpp.output b/regression-tests/test-results/clang-19-c++20/pure2-expected-is-as.cpp.output
index 5912e3a45d..f50a444ec1 100644
--- a/regression-tests/test-results/clang-19-c++20/pure2-expected-is-as.cpp.output
+++ b/regression-tests/test-results/clang-19-c++20/pure2-expected-is-as.cpp.output
@@ -5,7 +5,7 @@ pure2-expected-is-as.cpp2:7:10: error: no member named 'expected' in namespace '
     7 |     std::expected<int,int> ex1 {123}; 
       |     ~~~~~^~~~~~~~
       |          unexpected
-/usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/exception:110:8: note: 'unexpected' declared here
+/usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/exception:110:8: note: 'unexpected' declared here
   110 |   void unexpected() __attribute__ ((__noreturn__,__cold__));
       |        ^
 pure2-expected-is-as.cpp2:8:22: error: expected '(' for function-style cast or type construction
@@ -15,7 +15,7 @@ pure2-expected-is-as.cpp2:8:10: error: no member named 'expected' in namespace '
     8 |     std::expected<int,int> ex2 {std::unexpected(-1)}; 
       |     ~~~~~^~~~~~~~
       |          unexpected
-/usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/exception:110:8: note: 'unexpected' declared here
+/usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/exception:110:8: note: 'unexpected' declared here
   110 |   void unexpected() __attribute__ ((__noreturn__,__cold__));
       |        ^
 pure2-expected-is-as.cpp2:9:30: error: expected '(' for function-style cast or type construction
@@ -25,7 +25,7 @@ pure2-expected-is-as.cpp2:9:10: error: no member named 'expected' in namespace '
     9 |     std::expected<std::string,size_t> ex3 {"Expect the unexpected"}; 
       |     ~~~~~^~~~~~~~
       |          unexpected
-/usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/exception:110:8: note: 'unexpected' declared here
+/usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/exception:110:8: note: 'unexpected' declared here
   110 |   void unexpected() __attribute__ ((__noreturn__,__cold__));
       |        ^
 pure2-expected-is-as.cpp2:11:29: error: use of undeclared identifier 'ex1'; did you mean 'exp'?
@@ -52,19 +52,19 @@ pure2-expected-is-as.cpp2:20:30: error: use of undeclared identifier 'ex1'; did
 pure2-expected-is-as.cpp2:25:29: warning: 'unexpected' is deprecated [-Wdeprecated-declarations]
    25 |     if (cpp2::impl::is<std::unexpected<int>>(ex1)) {
       |                             ^
-/usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/exception:109:3: note: 'unexpected' has been explicitly marked deprecated here
+/usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/exception:109:3: note: 'unexpected' has been explicitly marked deprecated here
   109 |   _GLIBCXX11_DEPRECATED
       |   ^
-/usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/x86_64-linux-gnu/c++/14/bits/c++config.h:107:32: note: expanded from macro '_GLIBCXX11_DEPRECATED'
+/usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/x86_64-linux-gnu/c++/14/bits/c++config.h:107:32: note: expanded from macro '_GLIBCXX11_DEPRECATED'
   107 | # define _GLIBCXX11_DEPRECATED _GLIBCXX_DEPRECATED
       |                                ^
-/usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/x86_64-linux-gnu/c++/14/bits/c++config.h:98:46: note: expanded from macro '_GLIBCXX_DEPRECATED'
+/usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/x86_64-linux-gnu/c++/14/bits/c++config.h:98:46: note: expanded from macro '_GLIBCXX_DEPRECATED'
    98 | # define _GLIBCXX_DEPRECATED __attribute__ ((__deprecated__))
       |                                              ^
 pure2-expected-is-as.cpp2:25:29: error: 'unexpected' does not name a template but is followed by template arguments
    25 |     if (cpp2::impl::is<std::unexpected<int>>(ex1)) {
       |                             ^         ~~~~~
-/usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/exception:110:8: note: non-template declaration found by name lookup
+/usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/exception:110:8: note: non-template declaration found by name lookup
   110 |   void unexpected() __attribute__ ((__noreturn__,__cold__));
       |        ^
 pure2-expected-is-as.cpp2:25:46: error: use of undeclared identifier 'ex1'; did you mean 'exp'?
@@ -89,154 +89,154 @@ pure2-expected-is-as.cpp2:34:24: error: use of undeclared identifier 'ex1'; did
    95 | __MATHCALL_VEC (exp,, (_Mdouble_ __x));
       |                 ^
 In file included from pure2-expected-is-as.cpp:7:
-../../../include/cpp2util.h:469:72: error: invalid application of 'sizeof' to a function type
-  469 |     (std::is_floating_point_v<From> && std::is_floating_point_v<To> && sizeof(From) > sizeof(To)) || // NOLINT(misc-redundant-expression)
+../../../include/cpp2util.h:475:72: error: invalid application of 'sizeof' to a function type
+  475 |     (std::is_floating_point_v<From> && std::is_floating_point_v<To> && sizeof(From) > sizeof(To)) || // NOLINT(misc-redundant-expression)
       |                                                                        ^~~~~~~~~~~~
-../../../include/cpp2util.h:2923:19: note: in instantiation of variable template specialization 'cpp2::impl::is_narrowing_v' requested here
- 2923 |     if constexpr (is_narrowing_v<C, CPP2_TYPEOF(x)>) {
+../../../include/cpp2util.h:2929:19: note: in instantiation of variable template specialization 'cpp2::impl::is_narrowing_v' requested here
+ 2929 |     if constexpr (is_narrowing_v<C, CPP2_TYPEOF(x)>) {
       |                   ^
 pure2-expected-is-as.cpp2:39:28: note: in instantiation of function template specialization 'cpp2::impl::as_<int, double (&)(double) noexcept>' requested here
    39 |     auto val1 {cpp2::impl::as_<int>(ex1)}; 
       |                            ^
 In file included from pure2-expected-is-as.cpp:7:
-../../../include/cpp2util.h:2925:13: error: static assertion failed due to requirement 'program_violates_type_safety_guarantee<int, double (double) noexcept>': 'as' does not allow unsafe possibly-lossy narrowing conversions - if you're sure you want this, use 'unchecked_narrow<T>' to explicitly force the conversion and possibly lose information
- 2925 |             program_violates_type_safety_guarantee<C, CPP2_TYPEOF(x)>,
+../../../include/cpp2util.h:2931:13: error: static assertion failed due to requirement 'program_violates_type_safety_guarantee<int, double (double) noexcept>': 'as' does not allow unsafe possibly-lossy narrowing conversions - if you're sure you want this, use 'unchecked_narrow<T>' to explicitly force the conversion and possibly lose information
+ 2931 |             program_violates_type_safety_guarantee<C, CPP2_TYPEOF(x)>,
       |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 pure2-expected-is-as.cpp2:39:28: note: in instantiation of function template specialization 'cpp2::impl::as_<int, double (&)(double) noexcept>' requested here
    39 |     auto val1 {cpp2::impl::as_<int>(ex1)}; 
       |                            ^
 In file included from pure2-expected-is-as.cpp:7:
-../../../include/cpp2util.h:2936:52: error: no matching function for call to 'as'
- 2936 |     else if constexpr( std::is_same_v< CPP2_TYPEOF(as<C>(CPP2_FORWARD(x))), nonesuch_ > ) {
+../../../include/cpp2util.h:2942:52: error: no matching function for call to 'as'
+ 2942 |     else if constexpr( std::is_same_v< CPP2_TYPEOF(as<C>(CPP2_FORWARD(x))), nonesuch_ > ) {
       |                                                    ^~~~~
-../../../include/cpp2util.h:317:66: note: expanded from macro 'CPP2_TYPEOF'
-  317 | #define CPP2_TYPEOF(x)              std::remove_cvref_t<decltype(x)>
+../../../include/cpp2util.h:323:66: note: expanded from macro 'CPP2_TYPEOF'
+  323 | #define CPP2_TYPEOF(x)              std::remove_cvref_t<decltype(x)>
       |                                                                  ^
-../../../include/cpp2util.h:1901:16: note: candidate template ignored: constraints not satisfied [with C = int, x:auto = double (&)(double) noexcept]
- 1901 | constexpr auto as(auto&& x CPP2_SOURCE_LOCATION_PARAM_WITH_DEFAULT_AS) -> decltype(auto)
+../../../include/cpp2util.h:1907:16: note: candidate template ignored: constraints not satisfied [with C = int, x:auto = double (&)(double) noexcept]
+ 1907 | constexpr auto as(auto&& x CPP2_SOURCE_LOCATION_PARAM_WITH_DEFAULT_AS) -> decltype(auto)
       |                ^
-../../../include/cpp2util.h:1907:18: note: because 'std::is_scalar_v<std::remove_cvref_t<decltype(x)> >' evaluated to false
- 1907 |                 (std::is_scalar_v<CPP2_TYPEOF(x)> && !std::is_enum_v<CPP2_TYPEOF(x)>)
+../../../include/cpp2util.h:1913:18: note: because 'std::is_scalar_v<std::remove_cvref_t<decltype(x)> >' evaluated to false
+ 1913 |                 (std::is_scalar_v<CPP2_TYPEOF(x)> && !std::is_enum_v<CPP2_TYPEOF(x)>)
       |                  ^
-../../../include/cpp2util.h:1908:17: note: and 'std::is_floating_point_v<std::remove_cvref_t<decltype(x)> >' evaluated to false
- 1908 |             ||  std::is_floating_point_v<CPP2_TYPEOF(x)>
+../../../include/cpp2util.h:1914:17: note: and 'std::is_floating_point_v<std::remove_cvref_t<decltype(x)> >' evaluated to false
+ 1914 |             ||  std::is_floating_point_v<CPP2_TYPEOF(x)>
       |                 ^
-../../../include/cpp2util.h:1909:17: note: and 'std::is_base_of_v<int, std::remove_cvref_t<decltype(x)> >' evaluated to false
- 1909 |             ||  std::is_base_of_v<C, CPP2_TYPEOF(x)>
+../../../include/cpp2util.h:1915:17: note: and 'std::is_base_of_v<int, std::remove_cvref_t<decltype(x)> >' evaluated to false
+ 1915 |             ||  std::is_base_of_v<C, CPP2_TYPEOF(x)>
       |                 ^
-../../../include/cpp2util.h:1910:17: note: and 'std::is_base_of_v<std::remove_cvref_t<decltype(x)>, int>' evaluated to false
- 1910 |             ||  std::is_base_of_v<CPP2_TYPEOF(x), C>
+../../../include/cpp2util.h:1916:17: note: and 'std::is_base_of_v<std::remove_cvref_t<decltype(x)>, int>' evaluated to false
+ 1916 |             ||  std::is_base_of_v<CPP2_TYPEOF(x), C>
       |                 ^
-../../../include/cpp2util.h:1911:30: note: and 'C{std::forward<decltype(x)>(x)}' would be invalid: cannot initialize a value of type 'int' with an lvalue of type 'double (double) noexcept'
- 1911 |             ||  requires { C{CPP2_FORWARD(x)}; }
+../../../include/cpp2util.h:1917:30: note: and 'C{std::forward<decltype(x)>(x)}' would be invalid: cannot initialize a value of type 'int' with an lvalue of type 'double (double) noexcept'
+ 1917 |             ||  requires { C{CPP2_FORWARD(x)}; }
       |                              ^
-../../../include/cpp2util.h:327:37: note: expanded from macro 'CPP2_FORWARD'
-  327 | #define CPP2_FORWARD(x)             std::forward<decltype(x)>(x)
+../../../include/cpp2util.h:333:37: note: expanded from macro 'CPP2_FORWARD'
+  333 | #define CPP2_FORWARD(x)             std::forward<decltype(x)>(x)
       |                                     ^
-../../../include/cpp2util.h:2040:6: note: candidate template ignored: constraints not satisfied [with C = int, X = double (&)(double) noexcept]
- 2040 | auto as(X&& x CPP2_SOURCE_LOCATION_PARAM_WITH_DEFAULT_AS) -> decltype(auto)
+../../../include/cpp2util.h:2046:6: note: candidate template ignored: constraints not satisfied [with C = int, X = double (&)(double) noexcept]
+ 2046 | auto as(X&& x CPP2_SOURCE_LOCATION_PARAM_WITH_DEFAULT_AS) -> decltype(auto)
       |      ^
-../../../include/cpp2util.h:2039:23: note: because 'specialization_of_template<double (&)(double) noexcept, std::variant>' evaluated to false
- 2039 | template< typename C, specialization_of_template<std::variant> X >
+../../../include/cpp2util.h:2045:23: note: because 'specialization_of_template<double (&)(double) noexcept, std::variant>' evaluated to false
+ 2045 | template< typename C, specialization_of_template<std::variant> X >
       |                       ^
-../../../include/cpp2util.h:891:7: note: because 'specialization_of_template_helper<C>(std::forward<X>(x))' would be invalid: no matching function for call to 'specialization_of_template_helper'
-  891 |     { specialization_of_template_helper<C>(std::forward<X>(x)) } -> std::same_as<std::true_type>;
+../../../include/cpp2util.h:897:7: note: because 'specialization_of_template_helper<C>(std::forward<X>(x))' would be invalid: no matching function for call to 'specialization_of_template_helper'
+  897 |     { specialization_of_template_helper<C>(std::forward<X>(x)) } -> std::same_as<std::true_type>;
       |       ^
-../../../include/cpp2util.h:2087:16: note: candidate template ignored: constraints not satisfied [with T = int, X = double (&)(double) noexcept]
- 2087 | constexpr auto as( X && x ) -> decltype(auto) {
+../../../include/cpp2util.h:2093:16: note: candidate template ignored: constraints not satisfied [with T = int, X = double (&)(double) noexcept]
+ 2093 | constexpr auto as( X && x ) -> decltype(auto) {
       |                ^
-../../../include/cpp2util.h:2086:22: note: because 'same_type_as<double (&)(double) noexcept, std::any>' evaluated to false
- 2086 | template<typename T, same_type_as<std::any> X>
+../../../include/cpp2util.h:2092:22: note: because 'same_type_as<double (&)(double) noexcept, std::any>' evaluated to false
+ 2092 | template<typename T, same_type_as<std::any> X>
       |                      ^
-../../../include/cpp2util.h:921:24: note: because 'std::same_as<std::remove_cvref_t<double (&)(double) noexcept>, std::remove_cvref_t<any> >' evaluated to false
-  921 | concept same_type_as = std::same_as<std::remove_cvref_t<X>, std::remove_cvref_t<C>>;
+../../../include/cpp2util.h:927:24: note: because 'std::same_as<std::remove_cvref_t<double (&)(double) noexcept>, std::remove_cvref_t<any> >' evaluated to false
+  927 | concept same_type_as = std::same_as<std::remove_cvref_t<X>, std::remove_cvref_t<C>>;
       |                        ^
-/usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/concepts:63:9: note: because '__detail::__same_as<double (double) noexcept, std::any>' evaluated to false
+/usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/concepts:63:9: note: because '__detail::__same_as<double (double) noexcept, std::any>' evaluated to false
    63 |       = __detail::__same_as<_Tp, _Up> && __detail::__same_as<_Up, _Tp>;
       |         ^
-/usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/concepts:57:27: note: because 'std::is_same_v<double (double) noexcept, std::any>' evaluated to false
+/usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/concepts:57:27: note: because 'std::is_same_v<double (double) noexcept, std::any>' evaluated to false
    57 |       concept __same_as = std::is_same_v<_Tp, _Up>;
       |                           ^
-../../../include/cpp2util.h:2130:16: note: candidate template ignored: constraints not satisfied [with T = int, X = double (&)(double) noexcept]
- 2130 | constexpr auto as( X&& x ) -> decltype(auto) { 
+../../../include/cpp2util.h:2136:16: note: candidate template ignored: constraints not satisfied [with T = int, X = double (&)(double) noexcept]
+ 2136 | constexpr auto as( X&& x ) -> decltype(auto) { 
       |                ^
-../../../include/cpp2util.h:2129:22: note: because 'specialization_of_template<double (&)(double) noexcept, std::optional>' evaluated to false
- 2129 | template<typename T, specialization_of_template<std::optional> X>
+../../../include/cpp2util.h:2135:22: note: because 'specialization_of_template<double (&)(double) noexcept, std::optional>' evaluated to false
+ 2135 | template<typename T, specialization_of_template<std::optional> X>
       |                      ^
-../../../include/cpp2util.h:891:7: note: because 'specialization_of_template_helper<C>(std::forward<X>(x))' would be invalid: no matching function for call to 'specialization_of_template_helper'
-  891 |     { specialization_of_template_helper<C>(std::forward<X>(x)) } -> std::same_as<std::true_type>;
+../../../include/cpp2util.h:897:7: note: because 'specialization_of_template_helper<C>(std::forward<X>(x))' would be invalid: no matching function for call to 'specialization_of_template_helper'
+  897 |     { specialization_of_template_helper<C>(std::forward<X>(x)) } -> std::same_as<std::true_type>;
       |       ^
-../../../include/cpp2util.h:1876:16: note: candidate function template not viable: requires 0 arguments, but 1 was provided
- 1876 | constexpr auto as() -> auto
+../../../include/cpp2util.h:1882:16: note: candidate function template not viable: requires 0 arguments, but 1 was provided
+ 1882 | constexpr auto as() -> auto
       |                ^
-../../../include/cpp2util.h:1887:16: note: candidate function template not viable: requires 0 arguments, but 1 was provided
- 1887 | constexpr auto as() -> auto
+../../../include/cpp2util.h:1893:16: note: candidate function template not viable: requires 0 arguments, but 1 was provided
+ 1893 | constexpr auto as() -> auto
       |                ^
-../../../include/cpp2util.h:2938:13: error: static assertion failed due to requirement 'program_violates_type_safety_guarantee<int, double (double) noexcept>': No safe 'as' cast available - please check your cast
- 2938 |             program_violates_type_safety_guarantee<C, CPP2_TYPEOF(x)>,
+../../../include/cpp2util.h:2944:13: error: static assertion failed due to requirement 'program_violates_type_safety_guarantee<int, double (double) noexcept>': No safe 'as' cast available - please check your cast
+ 2944 |             program_violates_type_safety_guarantee<C, CPP2_TYPEOF(x)>,
       |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-../../../include/cpp2util.h:2943:12: error: no matching function for call to 'as'
- 2943 |     return as<C>(CPP2_FORWARD(x));
+../../../include/cpp2util.h:2949:12: error: no matching function for call to 'as'
+ 2949 |     return as<C>(CPP2_FORWARD(x));
       |            ^~~~~
-../../../include/cpp2util.h:1901:16: note: candidate template ignored: constraints not satisfied [with C = int, x:auto = double (&)(double) noexcept]
- 1901 | constexpr auto as(auto&& x CPP2_SOURCE_LOCATION_PARAM_WITH_DEFAULT_AS) -> decltype(auto)
+../../../include/cpp2util.h:1907:16: note: candidate template ignored: constraints not satisfied [with C = int, x:auto = double (&)(double) noexcept]
+ 1907 | constexpr auto as(auto&& x CPP2_SOURCE_LOCATION_PARAM_WITH_DEFAULT_AS) -> decltype(auto)
       |                ^
-../../../include/cpp2util.h:1907:18: note: because 'std::is_scalar_v<std::remove_cvref_t<decltype(x)> >' evaluated to false
- 1907 |                 (std::is_scalar_v<CPP2_TYPEOF(x)> && !std::is_enum_v<CPP2_TYPEOF(x)>)
+../../../include/cpp2util.h:1913:18: note: because 'std::is_scalar_v<std::remove_cvref_t<decltype(x)> >' evaluated to false
+ 1913 |                 (std::is_scalar_v<CPP2_TYPEOF(x)> && !std::is_enum_v<CPP2_TYPEOF(x)>)
       |                  ^
-../../../include/cpp2util.h:1908:17: note: and 'std::is_floating_point_v<std::remove_cvref_t<decltype(x)> >' evaluated to false
- 1908 |             ||  std::is_floating_point_v<CPP2_TYPEOF(x)>
+../../../include/cpp2util.h:1914:17: note: and 'std::is_floating_point_v<std::remove_cvref_t<decltype(x)> >' evaluated to false
+ 1914 |             ||  std::is_floating_point_v<CPP2_TYPEOF(x)>
       |                 ^
-../../../include/cpp2util.h:1909:17: note: and 'std::is_base_of_v<int, std::remove_cvref_t<decltype(x)> >' evaluated to false
- 1909 |             ||  std::is_base_of_v<C, CPP2_TYPEOF(x)>
+../../../include/cpp2util.h:1915:17: note: and 'std::is_base_of_v<int, std::remove_cvref_t<decltype(x)> >' evaluated to false
+ 1915 |             ||  std::is_base_of_v<C, CPP2_TYPEOF(x)>
       |                 ^
-../../../include/cpp2util.h:1910:17: note: and 'std::is_base_of_v<std::remove_cvref_t<decltype(x)>, int>' evaluated to false
- 1910 |             ||  std::is_base_of_v<CPP2_TYPEOF(x), C>
+../../../include/cpp2util.h:1916:17: note: and 'std::is_base_of_v<std::remove_cvref_t<decltype(x)>, int>' evaluated to false
+ 1916 |             ||  std::is_base_of_v<CPP2_TYPEOF(x), C>
       |                 ^
-../../../include/cpp2util.h:1911:30: note: and 'C{std::forward<decltype(x)>(x)}' would be invalid: cannot initialize a value of type 'int' with an lvalue of type 'double (double) noexcept'
- 1911 |             ||  requires { C{CPP2_FORWARD(x)}; }
+../../../include/cpp2util.h:1917:30: note: and 'C{std::forward<decltype(x)>(x)}' would be invalid: cannot initialize a value of type 'int' with an lvalue of type 'double (double) noexcept'
+ 1917 |             ||  requires { C{CPP2_FORWARD(x)}; }
       |                              ^
-../../../include/cpp2util.h:327:37: note: expanded from macro 'CPP2_FORWARD'
-  327 | #define CPP2_FORWARD(x)             std::forward<decltype(x)>(x)
+../../../include/cpp2util.h:333:37: note: expanded from macro 'CPP2_FORWARD'
+  333 | #define CPP2_FORWARD(x)             std::forward<decltype(x)>(x)
       |                                     ^
-../../../include/cpp2util.h:2040:6: note: candidate template ignored: constraints not satisfied [with C = int, X = double (&)(double) noexcept]
- 2040 | auto as(X&& x CPP2_SOURCE_LOCATION_PARAM_WITH_DEFAULT_AS) -> decltype(auto)
+../../../include/cpp2util.h:2046:6: note: candidate template ignored: constraints not satisfied [with C = int, X = double (&)(double) noexcept]
+ 2046 | auto as(X&& x CPP2_SOURCE_LOCATION_PARAM_WITH_DEFAULT_AS) -> decltype(auto)
       |      ^
-../../../include/cpp2util.h:2039:23: note: because 'specialization_of_template<double (&)(double) noexcept, std::variant>' evaluated to false
- 2039 | template< typename C, specialization_of_template<std::variant> X >
+../../../include/cpp2util.h:2045:23: note: because 'specialization_of_template<double (&)(double) noexcept, std::variant>' evaluated to false
+ 2045 | template< typename C, specialization_of_template<std::variant> X >
       |                       ^
-../../../include/cpp2util.h:891:7: note: because 'specialization_of_template_helper<C>(std::forward<X>(x))' would be invalid: no matching function for call to 'specialization_of_template_helper'
-  891 |     { specialization_of_template_helper<C>(std::forward<X>(x)) } -> std::same_as<std::true_type>;
+../../../include/cpp2util.h:897:7: note: because 'specialization_of_template_helper<C>(std::forward<X>(x))' would be invalid: no matching function for call to 'specialization_of_template_helper'
+  897 |     { specialization_of_template_helper<C>(std::forward<X>(x)) } -> std::same_as<std::true_type>;
       |       ^
-../../../include/cpp2util.h:2087:16: note: candidate template ignored: constraints not satisfied [with T = int, X = double (&)(double) noexcept]
- 2087 | constexpr auto as( X && x ) -> decltype(auto) {
+../../../include/cpp2util.h:2093:16: note: candidate template ignored: constraints not satisfied [with T = int, X = double (&)(double) noexcept]
+ 2093 | constexpr auto as( X && x ) -> decltype(auto) {
       |                ^
-../../../include/cpp2util.h:2086:22: note: because 'same_type_as<double (&)(double) noexcept, std::any>' evaluated to false
- 2086 | template<typename T, same_type_as<std::any> X>
+../../../include/cpp2util.h:2092:22: note: because 'same_type_as<double (&)(double) noexcept, std::any>' evaluated to false
+ 2092 | template<typename T, same_type_as<std::any> X>
       |                      ^
-../../../include/cpp2util.h:921:24: note: because 'std::same_as<std::remove_cvref_t<double (&)(double) noexcept>, std::remove_cvref_t<any> >' evaluated to false
-  921 | concept same_type_as = std::same_as<std::remove_cvref_t<X>, std::remove_cvref_t<C>>;
+../../../include/cpp2util.h:927:24: note: because 'std::same_as<std::remove_cvref_t<double (&)(double) noexcept>, std::remove_cvref_t<any> >' evaluated to false
+  927 | concept same_type_as = std::same_as<std::remove_cvref_t<X>, std::remove_cvref_t<C>>;
       |                        ^
-/usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/concepts:63:9: note: because '__detail::__same_as<double (double) noexcept, std::any>' evaluated to false
+/usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/concepts:63:9: note: because '__detail::__same_as<double (double) noexcept, std::any>' evaluated to false
    63 |       = __detail::__same_as<_Tp, _Up> && __detail::__same_as<_Up, _Tp>;
       |         ^
-/usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/concepts:57:27: note: because 'std::is_same_v<double (double) noexcept, std::any>' evaluated to false
+/usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/concepts:57:27: note: because 'std::is_same_v<double (double) noexcept, std::any>' evaluated to false
    57 |       concept __same_as = std::is_same_v<_Tp, _Up>;
       |                           ^
-../../../include/cpp2util.h:2130:16: note: candidate template ignored: constraints not satisfied [with T = int, X = double (&)(double) noexcept]
- 2130 | constexpr auto as( X&& x ) -> decltype(auto) { 
+../../../include/cpp2util.h:2136:16: note: candidate template ignored: constraints not satisfied [with T = int, X = double (&)(double) noexcept]
+ 2136 | constexpr auto as( X&& x ) -> decltype(auto) { 
       |                ^
-../../../include/cpp2util.h:2129:22: note: because 'specialization_of_template<double (&)(double) noexcept, std::optional>' evaluated to false
- 2129 | template<typename T, specialization_of_template<std::optional> X>
+../../../include/cpp2util.h:2135:22: note: because 'specialization_of_template<double (&)(double) noexcept, std::optional>' evaluated to false
+ 2135 | template<typename T, specialization_of_template<std::optional> X>
       |                      ^
-../../../include/cpp2util.h:891:7: note: because 'specialization_of_template_helper<C>(std::forward<X>(x))' would be invalid: no matching function for call to 'specialization_of_template_helper'
-  891 |     { specialization_of_template_helper<C>(std::forward<X>(x)) } -> std::same_as<std::true_type>;
+../../../include/cpp2util.h:897:7: note: because 'specialization_of_template_helper<C>(std::forward<X>(x))' would be invalid: no matching function for call to 'specialization_of_template_helper'
+  897 |     { specialization_of_template_helper<C>(std::forward<X>(x)) } -> std::same_as<std::true_type>;
       |       ^
-../../../include/cpp2util.h:1876:16: note: candidate function template not viable: requires 0 arguments, but 1 was provided
- 1876 | constexpr auto as() -> auto
+../../../include/cpp2util.h:1882:16: note: candidate function template not viable: requires 0 arguments, but 1 was provided
+ 1882 | constexpr auto as() -> auto
       |                ^
-../../../include/cpp2util.h:1887:16: note: candidate function template not viable: requires 0 arguments, but 1 was provided
- 1887 | constexpr auto as() -> auto
+../../../include/cpp2util.h:1893:16: note: candidate function template not viable: requires 0 arguments, but 1 was provided
+ 1893 | constexpr auto as() -> auto
       |                ^
 pure2-expected-is-as.cpp2:39:37: error: use of undeclared identifier 'ex1'
    39 |     auto val1 {cpp2::impl::as_<int>(ex1)}; 
diff --git a/regression-tests/test-results/clang-19-c++20/pure2-regex-general.cpp.execution b/regression-tests/test-results/clang-19-c++20/pure2-regex-general.cpp.execution
new file mode 100644
index 0000000000..c44d084902
--- /dev/null
+++ b/regression-tests/test-results/clang-19-c++20/pure2-regex-general.cpp.execution
@@ -0,0 +1,11 @@
+Running tests_01_char_matcher:
+Not full match fails: 0
+Full match is ok:     1
+Search finds at position 1: 1
+Search finds at position 3: 3
+Find all finds at position: 1
+Find all finds at position: 4
+Find all finds at position: 7
+Find all found 3 matched: 3
+Find all finds at position: 2
+Find all found 1 match: 1
diff --git a/regression-tests/test-results/clang-19-c++20/pure2-regex-general.cpp.output b/regression-tests/test-results/clang-19-c++20/pure2-regex-general.cpp.output
deleted file mode 100644
index fd1623b5dc..0000000000
--- a/regression-tests/test-results/clang-19-c++20/pure2-regex-general.cpp.output
+++ /dev/null
@@ -1,78 +0,0 @@
-PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
-Stack dump:
-0.	Program arguments: /usr/lib/llvm-18/bin/clang -cc1 -triple x86_64-pc-linux-gnu -emit-obj -mrelax-all -dumpdir test.exe- -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name pure2-regex-general.cpp -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=all -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/home/runner/work/cppfront/cppfront/regression-tests/test-results/clang-18-c++20 -fcoverage-compilation-dir=/home/runner/work/cppfront/cppfront/regression-tests/test-results/clang-18-c++20 -resource-dir /usr/lib/llvm-18/lib/clang/18 -I ../../../include -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14 -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/x86_64-linux-gnu/c++/14 -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/backward -internal-isystem /usr/lib/llvm-18/lib/clang/18/include -internal-isystem /usr/local/include -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -std=c++20 -fdeprecated-macro -ferror-limit 19 -pthread -fgnuc-version=4.2.1 -fno-implicit-modules -fskip-odr-check-in-gmf -fcxx-exceptions -fexceptions -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/pure2-regex-general-61d726.o -x c++ pure2-regex-general.cpp
-1.	<eof> parser at end of file
-2.	cpp2regex.h2:833:113: instantiating function definition 'cpp2::regex::regular_expression<char, general_regex_test::regex_01_matcher<char>>::find_all<const char *, (lambda at pure2-regex-general.cpp2:13:16)>'
-3.	pure2-regex-general.cpp2:13:16: instantiating function definition 'general_regex_test::run()::(anonymous class)::operator()<cpp2::regex::regular_expression<char, general_regex_test::regex_01_matcher<char>>::search_return<const char *>>'
-4.	pure2-regex-general.cpp2:15:54 <Spelling=../../../include/cpp2util.h:10058:66>: instantiating function definition 'general_regex_test::run()::(anonymous class)::operator()(const cpp2::regex::regular_expression<char, general_regex_test::regex_01_matcher<char>>::search_return<const char *> &)::(anonymous class)::operator()<const cpp2::regex::regular_expression<char, general_regex_test::regex_01_matcher<char>>::search_return<const char *> &, int>'
- #0 0x00007f4e119a63bf llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xda63bf)
- #1 0x00007f4e119a44f9 llvm::sys::RunSignalHandlers() (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xda44f9)
- #2 0x00007f4e119a6b00 (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xda6b00)
- #3 0x00007f4e10445330 (/lib/x86_64-linux-gnu/libc.so.6+0x45330)
- #4 0x00007f4e19b18f6a clang::Sema::tryCaptureVariable(clang::ValueDecl*, clang::SourceLocation, clang::Sema::TryCaptureKind, clang::SourceLocation, bool, clang::QualType&, clang::QualType&, unsigned int const*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1718f6a)
- #5 0x00007f4e19ae10a6 clang::Sema::BuildDeclRefExpr(clang::ValueDecl*, clang::QualType, clang::ExprValueKind, clang::DeclarationNameInfo const&, clang::NestedNameSpecifierLoc, clang::NamedDecl*, clang::SourceLocation, clang::TemplateArgumentListInfo const*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x16e10a6)
- #6 0x00007f4e19ae1005 clang::Sema::BuildDeclRefExpr(clang::ValueDecl*, clang::QualType, clang::ExprValueKind, clang::DeclarationNameInfo const&, clang::CXXScopeSpec const*, clang::NamedDecl*, clang::SourceLocation, clang::TemplateArgumentListInfo const*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x16e1005)
- #7 0x00007f4e19ae533c clang::Sema::BuildDeclarationNameExpr(clang::CXXScopeSpec const&, clang::DeclarationNameInfo const&, clang::NamedDecl*, clang::NamedDecl*, clang::TemplateArgumentListInfo const*, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x16e533c)
- #8 0x00007f4e19f77871 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b77871)
- #9 0x00007f4e19f7abfb (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b7abfb)
-#10 0x00007f4e19f599c4 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b599c4)
-#11 0x00007f4e19f70a28 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b70a28)
-#12 0x00007f4e19f60341 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b60341)
-#13 0x00007f4e19f6681c (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b6681c)
-#14 0x00007f4e19f6b4b4 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b6b4b4)
-#15 0x00007f4e19f6e08d (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b6e08d)
-#16 0x00007f4e19f6b4b4 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b6b4b4)
-#17 0x00007f4e19f72670 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b72670)
-#18 0x00007f4e19f65c77 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b65c77)
-#19 0x00007f4e19f8645a (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b8645a)
-#20 0x00007f4e19f8449f (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b8449f)
-#21 0x00007f4e19f70669 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b70669)
-#22 0x00007f4e19f5fa03 clang::Sema::SubstStmt(clang::Stmt*, clang::MultiLevelTemplateArgumentList const&) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b5fa03)
-#23 0x00007f4e19fa1f26 clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1ba1f26)
-#24 0x00007f4e197ecde0 clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref<void ()>) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x13ecde0)
-#25 0x00007f4e19f0280e clang::Sema::DeduceReturnType(clang::FunctionDecl*, clang::SourceLocation, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b0280e)
-#26 0x00007f4e19ad6bc9 clang::Sema::DiagnoseUseOfDecl(clang::NamedDecl*, llvm::ArrayRef<clang::SourceLocation>, clang::ObjCInterfaceDecl const*, bool, bool, clang::ObjCInterfaceDecl*, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x16d6bc9)
-#27 0x00007f4e19dde3ce (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x19de3ce)
-#28 0x00007f4e19de5884 clang::Sema::BuildCallToObjectOfClassType(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x19e5884)
-#29 0x00007f4e19adbb7d clang::Sema::BuildCallExpr(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::Expr*, bool, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x16dbb7d)
-#30 0x00007f4e19af60a1 clang::Sema::ActOnCallExpr(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::Expr*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x16f60a1)
-#31 0x00007f4e19f6b65d (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b6b65d)
-#32 0x00007f4e19f6f44e (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b6f44e)
-#33 0x00007f4e19f6f42d (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b6f42d)
-#34 0x00007f4e19f5fa77 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b5fa77)
-#35 0x00007f4e19f70669 (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b70669)
-#36 0x00007f4e19f5fa03 clang::Sema::SubstStmt(clang::Stmt*, clang::MultiLevelTemplateArgumentList const&) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1b5fa03)
-#37 0x00007f4e19fa1f26 clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1ba1f26)
-#38 0x00007f4e19fa4744 clang::Sema::PerformPendingInstantiations(bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1ba4744)
-#39 0x00007f4e19fa2029 clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1ba2029)
-#40 0x00007f4e19fa4744 clang::Sema::PerformPendingInstantiations(bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x1ba4744)
-#41 0x00007f4e197ee90b clang::Sema::ActOnEndOfTranslationUnitFragment(clang::Sema::TUFragmentKind) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x13ee90b)
-#42 0x00007f4e197eef7b clang::Sema::ActOnEndOfTranslationUnit() (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x13eef7b)
-#43 0x00007f4e1905fe2e clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xc5fe2e)
-#44 0x00007f4e18f9747e clang::ParseAST(clang::Sema&, bool, bool) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0xb9747e)
-#45 0x00007f4e1ae0662c clang::FrontendAction::Execute() (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x2a0662c)
-#46 0x00007f4e1ad830b4 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x29830b4)
-#47 0x00007f4e1ae8263d clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/usr/lib/llvm-18/bin/../lib/libclang-cpp.so.18.1+0x2a8263d)
-#48 0x00005651f692c42e cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/usr/lib/llvm-18/bin/clang+0x1442e)
-#49 0x00005651f6929894 (/usr/lib/llvm-18/bin/clang+0x11894)
-#50 0x00005651f6928a26 clang_main(int, char**, llvm::ToolContext const&) (/usr/lib/llvm-18/bin/clang+0x10a26)
-#51 0x00005651f6936383 main (/usr/lib/llvm-18/bin/clang+0x1e383)
-#52 0x00007f4e1042a1ca (/lib/x86_64-linux-gnu/libc.so.6+0x2a1ca)
-#53 0x00007f4e1042a28b __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2a28b)
-#54 0x00005651f6926255 _start (/usr/lib/llvm-18/bin/clang+0xe255)
-clang++-18: error: unable to execute command: Segmentation fault (core dumped)
-clang++-18: error: clang frontend command failed due to signal (use -v to see invocation)
-Ubuntu clang version 18.1.3 (1ubuntu1)
-Target: x86_64-pc-linux-gnu
-Thread model: posix
-InstalledDir: /usr/bin
-clang++-18: note: diagnostic msg: 
-********************
-
-PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
-Preprocessed source(s) and associated run script(s) are located at:
-clang++-18: note: diagnostic msg: /tmp/pure2-regex-general-de6211.cpp
-clang++-18: note: diagnostic msg: /tmp/pure2-regex-general-de6211.sh
-clang++-18: note: diagnostic msg: 
-
-********************
diff --git a/regression-tests/test-results/clang-19-c++23-libcpp/mixed-function-expression-with-repeated-capture.cpp b/regression-tests/test-results/clang-19-c++23-libcpp/mixed-function-expression-with-repeated-capture.cpp
new file mode 100644
index 0000000000..c7a140e3e0
--- /dev/null
+++ b/regression-tests/test-results/clang-19-c++23-libcpp/mixed-function-expression-with-repeated-capture.cpp
@@ -0,0 +1,43 @@
+#include <vector>
+#include <ranges>
+#include <string>
+#include <span>
+#include <algorithm>
+#include <iostream>
+
+
+//=== Cpp2 type declarations ====================================================
+
+
+#include "cpp2util.h"
+
+#line 1 "mixed-function-expression-with-repeated-capture.cpp2"
+
+
+//=== Cpp2 type definitions and function declarations ===========================
+
+#line 1 "mixed-function-expression-with-repeated-capture.cpp2"
+
+#line 8 "mixed-function-expression-with-repeated-capture.cpp2"
+[[nodiscard]] auto main() -> int;
+
+//=== Cpp2 function definitions =================================================
+
+#line 1 "mixed-function-expression-with-repeated-capture.cpp2"
+
+#line 8 "mixed-function-expression-with-repeated-capture.cpp2"
+[[nodiscard]] auto main() -> int{
+    std::vector<std::string> vec {
+            "hello", "2022"}; 
+
+    auto y {"\n"}; 
+    std::ranges::for_each
+        (vec, [_0 = cpp2::move(y)](auto const& x) mutable -> decltype(auto) { return std::cout << _0 << x << _0;  });
+
+    auto callback {[](auto& x) -> decltype(auto) { return x += "-ish";  }}; 
+    std::ranges::for_each(vec, cpp2::move(callback));
+
+    for ( auto const& str : cpp2::move(vec) ) 
+        std::cout << str << "\n";
+}
+
diff --git a/regression-tests/test-results/clang-19-c++23-libcpp/mixed-lifetime-safety-pointer-init-4.cpp b/regression-tests/test-results/clang-19-c++23-libcpp/mixed-lifetime-safety-pointer-init-4.cpp
new file mode 100644
index 0000000000..7351d09004
--- /dev/null
+++ b/regression-tests/test-results/clang-19-c++23-libcpp/mixed-lifetime-safety-pointer-init-4.cpp
@@ -0,0 +1,57 @@
+#line 2 "mixed-lifetime-safety-pointer-init-4.cpp2"
+#include <iostream>
+#include <random>
+
+
+//=== Cpp2 type declarations ====================================================
+
+
+#include "cpp2util.h"
+
+#line 1 "mixed-lifetime-safety-pointer-init-4.cpp2"
+
+
+//=== Cpp2 type definitions and function declarations ===========================
+
+#line 1 "mixed-lifetime-safety-pointer-init-4.cpp2"
+
+#line 5 "mixed-lifetime-safety-pointer-init-4.cpp2"
+[[nodiscard]] auto main() -> int;
+
+#line 21 "mixed-lifetime-safety-pointer-init-4.cpp2"
+auto print_and_decorate(auto const& x) -> void;
+#line 24 "mixed-lifetime-safety-pointer-init-4.cpp2"
+
+bool flip_a_coin() {
+    // Change std::mt19937 to std::random_device for non-deterministic PRNG
+    static std::mt19937 rand; 
+    return rand() % 2 == 1;
+}
+
+
+//=== Cpp2 function definitions =================================================
+
+#line 1 "mixed-lifetime-safety-pointer-init-4.cpp2"
+
+#line 5 "mixed-lifetime-safety-pointer-init-4.cpp2"
+[[nodiscard]] auto main() -> int{
+    int x {42}; 
+    int y {43}; 
+    cpp2::impl::deferred_init<int*> p; 
+
+    // ... more code ...
+    if (flip_a_coin()) {
+        p.construct(&y);
+    }
+    else {
+        p.construct(&x);
+    }
+
+    print_and_decorate(*cpp2::impl::assert_not_null(cpp2::move(p.value())));
+}
+
+#line 21 "mixed-lifetime-safety-pointer-init-4.cpp2"
+auto print_and_decorate(auto const& x) -> void{
+    std::cout << ">> " << x << "\n";
+}
+
diff --git a/regression-tests/test-results/clang-19-c++23-libcpp/pure2-default-arguments.cpp.output b/regression-tests/test-results/clang-19-c++23-libcpp/pure2-default-arguments.cpp.output
deleted file mode 100644
index e69de29bb2..0000000000
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-assert-expected-not-null.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-assert-expected-not-null.cpp.output
index ccc87218bc..625c578d57 100644
--- a/regression-tests/test-results/msvc-2022-c++20/pure2-assert-expected-not-null.cpp.output
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-assert-expected-not-null.cpp.output
@@ -6,7 +6,7 @@ pure2-assert-expected-not-null.cpp2(7): error C2143: syntax error: missing ';' b
 pure2-assert-expected-not-null.cpp2(7): error C2143: syntax error: missing ';' before '}'
 pure2-assert-expected-not-null.cpp2(9): error C2065: 'ex': undeclared identifier
 pure2-assert-expected-not-null.cpp2(9): error C2672: 'cpp2::impl::assert_not_null': no matching overloaded function found
-..\..\..\include\cpp2util.h(1126): note: could be 'decltype(auto) cpp2::impl::assert_not_null(_T0 &&,std::source_location)'
+..\..\..\include\cpp2util.h(1132): note: could be 'decltype(auto) cpp2::impl::assert_not_null(_T0 &&,std::source_location)'
 pure2-assert-expected-not-null.cpp2(14): error C2039: 'expected': is not a member of 'std'
 predefined C++ types (compiler internal)(357): note: see declaration of 'std'
 pure2-assert-expected-not-null.cpp2(14): error C2062: type 'int' unexpected
@@ -19,4 +19,4 @@ pure2-assert-expected-not-null.cpp2(14): note: while trying to match the argumen
 pure2-assert-expected-not-null.cpp2(14): error C2143: syntax error: missing ';' before '}'
 pure2-assert-expected-not-null.cpp2(15): error C2065: 'ex': undeclared identifier
 pure2-assert-expected-not-null.cpp2(15): error C2672: 'cpp2::impl::assert_not_null': no matching overloaded function found
-..\..\..\include\cpp2util.h(1126): note: could be 'decltype(auto) cpp2::impl::assert_not_null(_T0 &&,std::source_location)'
+..\..\..\include\cpp2util.h(1132): note: could be 'decltype(auto) cpp2::impl::assert_not_null(_T0 &&,std::source_location)'
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-late-comments.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-late-comments.cpp.output
new file mode 100644
index 0000000000..f6608912dc
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-late-comments.cpp.output
@@ -0,0 +1 @@
+pure2-bugfix-for-late-comments.cpp