Issue #28637: Reapply changeset 223731925d06
"issue28082: use IntFlag for re constants" by Ethan Furman. The re module is not more used in the site module and so adding "import enum" to re.py doesn't impact python_startup benchmark anymore.
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Lib/re.py
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Lib/re.py
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@ -119,6 +119,7 @@ This module also defines an exception 'error'.
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"""
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"""
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import enum
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import sre_compile
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import sre_compile
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import sre_parse
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import sre_parse
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import functools
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import functools
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@ -138,18 +139,26 @@ __all__ = [
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__version__ = "2.2.1"
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__version__ = "2.2.1"
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# flags
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class RegexFlag(enum.IntFlag):
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A = ASCII = sre_compile.SRE_FLAG_ASCII # assume ascii "locale"
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ASCII = sre_compile.SRE_FLAG_ASCII # assume ascii "locale"
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I = IGNORECASE = sre_compile.SRE_FLAG_IGNORECASE # ignore case
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IGNORECASE = sre_compile.SRE_FLAG_IGNORECASE # ignore case
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L = LOCALE = sre_compile.SRE_FLAG_LOCALE # assume current 8-bit locale
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LOCALE = sre_compile.SRE_FLAG_LOCALE # assume current 8-bit locale
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U = UNICODE = sre_compile.SRE_FLAG_UNICODE # assume unicode "locale"
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UNICODE = sre_compile.SRE_FLAG_UNICODE # assume unicode "locale"
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M = MULTILINE = sre_compile.SRE_FLAG_MULTILINE # make anchors look for newline
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MULTILINE = sre_compile.SRE_FLAG_MULTILINE # make anchors look for newline
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S = DOTALL = sre_compile.SRE_FLAG_DOTALL # make dot match newline
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DOTALL = sre_compile.SRE_FLAG_DOTALL # make dot match newline
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X = VERBOSE = sre_compile.SRE_FLAG_VERBOSE # ignore whitespace and comments
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VERBOSE = sre_compile.SRE_FLAG_VERBOSE # ignore whitespace and comments
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A = ASCII
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# sre extensions (experimental, don't rely on these)
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I = IGNORECASE
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T = TEMPLATE = sre_compile.SRE_FLAG_TEMPLATE # disable backtracking
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L = LOCALE
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DEBUG = sre_compile.SRE_FLAG_DEBUG # dump pattern after compilation
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U = UNICODE
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M = MULTILINE
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S = DOTALL
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X = VERBOSE
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# sre extensions (experimental, don't rely on these)
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TEMPLATE = sre_compile.SRE_FLAG_TEMPLATE # disable backtracking
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T = TEMPLATE
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DEBUG = sre_compile.SRE_FLAG_DEBUG # dump pattern after compilation
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globals().update(RegexFlag.__members__)
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# sre exception
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# sre exception
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error = sre_compile.error
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error = sre_compile.error
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