Classify directive syntax errors - #1322
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Signed-off-by: danielporterda <daniel.porter@digitalasset.com>
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What changed
Classifies directive parser failures with typed rules for malformed or duplicate attributes, non-self-closing
<Snippet>, self-closing conditional tags, attributes on closing tags, and attributes on<Else>.This PR does not assign public diagnostic codes; it only makes parser failures machine-classifiable instead of requiring message inspection.
Why
Syntax-error classification is separate from parsing successful tags and from rendering page diagnostics.
Validation
python -m pytest tests/test_directive_syntax_error_classification.py tests/test_snippet_tag_parser.py tests/test_if_version_tag_parser.py(20 passed)python -m ruff check scripts/snippets/model.py scripts/snippets/syntax.py tests/test_directive_syntax_error_classification.pypython -m mypy scripts/snippets/model.py scripts/snippets/syntax.pygit diff --check