[mypyc] Add librt.strings.isidentifier codepoint primitive#21522
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[mypyc] Add librt.strings.isidentifier codepoint primitive#21522VaggelisD wants to merge 1 commit into
librt.strings.isidentifier codepoint primitive#21522VaggelisD wants to merge 1 commit into
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True if a codepoint can start a valid identifier (XID_Start, per PEP 3131). The ASCII fast path covers `[A-Za-z_]` inline; non-ASCII codepoints round-trip through PyUnicode_FromOrdinal + PyUnicode_IsIdentifier so the answer matches str.isidentifier on a 1-character string. The non-ASCII path is the first allocating helper in this series, so its body lives out-of-line in codepoint_extra_ops.c (it would otherwise be emitted as a separate copy in every translation unit that includes the header). On OOM it swallows the exception via PyErr_Clear() and returns False, which keeps the function ERR_NEVER. Documented at the call site so callers don't get a surprising silent failure. Stack: depends on the librt.strings.isspace primitive.
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According to mypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅ |
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5th PR of #21418