mirror of https://github.com/python/cpython
32 lines
1.0 KiB
Python
32 lines
1.0 KiB
Python
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import re
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from .errors import ClinicError
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is_legal_c_identifier = re.compile("^[A-Za-z_][A-Za-z0-9_]*$").match
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def is_legal_py_identifier(identifier: str) -> bool:
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return all(is_legal_c_identifier(field) for field in identifier.split("."))
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# Identifiers that are okay in Python but aren't a good idea in C.
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# So if they're used Argument Clinic will add "_value" to the end
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# of the name in C.
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_c_keywords = frozenset("""
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asm auto break case char const continue default do double
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else enum extern float for goto if inline int long
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register return short signed sizeof static struct switch
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typedef typeof union unsigned void volatile while
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""".strip().split()
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)
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def ensure_legal_c_identifier(identifier: str) -> str:
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# For now, just complain if what we're given isn't legal.
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if not is_legal_c_identifier(identifier):
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raise ClinicError(f"Illegal C identifier: {identifier}")
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# But if we picked a C keyword, pick something else.
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if identifier in _c_keywords:
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return identifier + "_value"
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return identifier
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