Update CI tests configuration and release info

  - Add tests with free-threaded Python

Author: brunato

.github/workflows/test-elementpath.yml

@@ -14,7 +14,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14.0", "3.15.0-alpha.3", "pypy-3.10"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14", "3.14t", "3.15.0-beta.2", "pypy-3.10", "pypy-3.11"]
         exclude:
           - os: macos-latest
             python-version: 3.10
@@ -35,18 +35,16 @@ jobs:
         run: |
           pip install flake8
           flake8 elementpath --max-line-length=100 --statistics
-      - name: Lint with mypy==1.18.2
-        if: ${{ matrix.python-version == '3.15.0-alpha.3' || matrix.python-version == 'pypy-3.10' }}
+      - name: Lint with mypy==2.1.0
+        if: ${{ matrix.python-version != 'pypy-3.10' && matrix.python-version != 'pypy-3.11' }}
         run: |
-          pip install mypy==1.18.2 xmlschema lxml-stubs
+          pip install mypy==2.1.0 xmlschema lxml-stubs
           mypy --show-error-codes --strict elementpath
-      - name: Lint with mypy==1.19.1
-        if: ${{ matrix.python-version != '3.15.0-alpha.3' && matrix.python-version != 'pypy-3.10' }}
-        run: |
-          pip install mypy==1.19.1 xmlschema lxml-stubs
-          mypy --show-error-codes --strict elementpath
-      - name: Install optional dependencies
-        if: ${{ matrix.python-version != '3.15.0-alpha.3' }}
+      - name: Install lxml optional dependency
+        if: |
+          matrix.python-version != '3.15.0-beta.2' && 
+          matrix.python-version != 'pypy-3.10' &&
+          matrix.python-version != '3.14t'
         run: pip install lxml
       - name: Test with unittest
         run: |

CHANGELOG.rst

@@ -2,6 +2,11 @@
 CHANGELOG
 *********
 
+`v5.1.2`_ (2026-06-13)
+======================
+* Include PR #101 (invalid sequence type error code for external functions)
+* Fix issues #100 and #102
+
 `v5.1.1`_ (2026-01-20)
 ======================
 * Fix external function registrations (issue #099)
@@ -537,3 +542,4 @@ CHANGELOG
 .. _v5.0.4: https://github.com/sissaschool/elementpath/compare/v5.0.3...v5.0.4
 .. _v5.1.0: https://github.com/sissaschool/elementpath/compare/v5.0.4...v5.1.0
 .. _v5.1.1: https://github.com/sissaschool/elementpath/compare/v5.1.0...v5.1.1
+.. _v5.1.2: https://github.com/sissaschool/elementpath/compare/v5.1.1...v5.1.2

elementpath/xpath_tokens/base.py

@@ -154,6 +154,10 @@ def child_axis(self) -> bool:
             return True
         return not self._items[1].label.endswith('function')
 
+    def is_reference(self) -> bool:
+        """Is `True` if the token is a function reference, `False` otherwise."""
+        return False
+
     ###
     # Tokens tree analysis methods
     def iter_leaf_elements(self) -> Iterator[str]:
@@ -321,7 +325,7 @@ def get_argument(self, context: ta.ContextType,
             else:
                 return default
         else:
-            if isinstance(token, XPathToken) and callable(token) and token.is_reference():
+            if token.is_reference():
                 return token  # It's a function reference
 
             item = None

elementpath/xpath_tokens/functions.py

@@ -227,10 +227,8 @@ def max_args(self) -> Optional[int]:
         else:
             return None
 
-    def is_reference(self) -> int:
-        if not isinstance(self.nargs, int):
-            return False
-        return self.nargs and not len(self._items)
+    def is_reference(self) -> bool:
+        return isinstance(self.nargs, int) and self.nargs != 0 and not self._items
 
     def nud(self) -> 'XPathFunction':
         if not self.parser.parse_arguments:

publiccode.yml

@@ -6,8 +6,8 @@ publiccodeYmlVersion: '0.4'
 name: elementpath
 url: 'https://github.com/sissaschool/elementpath'
 landingURL: 'https://github.com/sissaschool/elementpath'
-releaseDate: '2025-01-20'
-softwareVersion: v5.1.1
+releaseDate: '2025-06-13'
+softwareVersion: v5.1.2
 developmentStatus: stable
 platforms:
   - linux

tox.ini

@@ -4,10 +4,10 @@
 # and then run "tox" from this directory.
 
 [tox]
-min_version = 4.0
+min_version = 4.50
 envlist =
-    py{310,311,312,313,314,314,314-opt,315,315-lxml,py310,py311}, docs, flake8,
-    mypy-py{310,311,312,313,314,315,py3}, pytest, coverage,
+    flake8, py{310,311,312,313,314,314,314t,314-opt,315,315-lxml,py310,py311},
+    docs, mypy-py{310,311,312,313,314,315}, pytest, coverage,
     xmlschema{401,410}, w3c-xsdtests, w3c-qt3tests
 skip_missing_interpreters = true
 work_dir = {tox_root}/../.tox/elementpath
@@ -28,6 +28,12 @@ deps =
     xmlschema~=4.2.0
 commands = python -OO -m unittest
 
+[testenv:py314t]
+deps =
+    lxml
+    xmlschema~=4.2.0
+commands = python -Xgil=0 -m unittest
+
 [testenv:py315]
 deps =
     xmlschema~=4.2.0
@@ -60,10 +66,9 @@ commands =
     flake8 elementpath
     flake8 tests
 
-[testenv:mypy-py{310,311,312,313,314,315,py3}]
+[testenv:mypy-py{310,311,312,313,314,315}]
 deps =
-    mypy==1.19.1; platform_python_implementation != 'PyPy'
-    mypy==1.18.2; platform_python_implementation == 'PyPy'
+    mypy==2.1.0
     xmlschema~=4.2.0
     lxml-stubs
 commands =
@@ -95,7 +100,7 @@ set_env =
     xmlschema420: VERSION = 4.2.0
 change_dir = {env_tmp_dir}
 deps =
-    mypy==1.19.1
+    mypy==2.1.0
     lxml
     lxml-stubs
     jinja2