More fixes for resumable parser

Author: rtfeldman

src/fmt/fmt2.zig

@@ -603,13 +603,16 @@ pub const Diagnostic = struct {
         // Expression errors
         expr_unexpected_token,
         expr_no_space_dot_int,
+        state_not_implemented,
         no_else,
         expected_expr_bar,
         backslash_not_valid_lambda_syntax,
+        obsolete_interface_keyword,
         expected_expr_close_curly_or_comma,
         expected_expr_close_round_or_comma,
         expected_expr_close_square_or_comma,
         expected_close_curly_at_end_of_match,
+        expected_close_round,
         expected_open_curly_after_match,
         expected_expr_record_field_name,
         expected_expr_apply_close_round,
@@ -789,6 +792,7 @@ pub fn parseDiagnosticToReport(self: *const @This(), env: *const CommonEnv, diag
         .expected_exposes => "EXPECTED EXPOSES",
         .pattern_unexpected_token => "UNEXPECTED TOKEN IN PATTERN",
         .expr_unexpected_token => "UNEXPECTED TOKEN IN EXPRESSION",
+        .state_not_implemented => "PARSER STATE NOT IMPLEMENTED",
         .string_unexpected_token => "UNEXPECTED TOKEN IN STRING",
         .ty_anno_unexpected_token => "UNEXPECTED TOKEN IN TYPE ANNOTATION",
         .statement_unexpected_token => "UNEXPECTED TOKEN",
@@ -867,6 +871,13 @@ pub fn parseDiagnosticToReport(self: *const @This(), env: *const CommonEnv, diag
             try report.document.addLineBreak();
             try report.document.addReflowingText("This could be a missing operator, incorrect syntax, or a token in the wrong place.");
         },
+        .state_not_implemented => {
+            try report.document.addText("Parser encountered an unimplemented state.");
+            try report.document.addLineBreak();
+            try report.document.addReflowingText("This is a limitation in the current parser implementation. The feature you're trying to use may not be fully implemented yet.");
+            try report.document.addLineBreak();
+            try report.document.addReflowingText("Please report this issue with your code example to help improve the parser.");
+        },
         else => {
             // Generic parse error message
             try report.document.addText("A parsing error occurred: ");