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415 lines
18 KiB
Python
415 lines
18 KiB
Python
"""
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pygments.lexers.c_cpp
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~~~~~~~~~~~~~~~~~~~~~
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Lexers for C/C++ languages.
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:copyright: Copyright 2006-2025 by the Pygments team, see AUTHORS.
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:license: BSD, see LICENSE for details.
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"""
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import re
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from pygments.lexer import RegexLexer, include, bygroups, using, \
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this, inherit, default, words
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from pygments.util import get_bool_opt
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from pygments.token import Text, Comment, Operator, Keyword, Name, String, \
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Number, Punctuation, Whitespace
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__all__ = ['CLexer', 'CppLexer']
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class CFamilyLexer(RegexLexer):
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"""
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For C family source code. This is used as a base class to avoid repetitious
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definitions.
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"""
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# The trailing ?, rather than *, avoids a geometric performance drop here.
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#: only one /* */ style comment
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_ws1 = r'\s*(?:/[*].*?[*]/\s*)?'
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# Hexadecimal part in an hexadecimal integer/floating-point literal.
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# This includes decimal separators matching.
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_hexpart = r'[0-9a-fA-F](\'?[0-9a-fA-F])*'
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# Decimal part in an decimal integer/floating-point literal.
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# This includes decimal separators matching.
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_decpart = r'\d(\'?\d)*'
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# Integer literal suffix (e.g. 'ull' or 'll').
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_intsuffix = r'(([uU][lL]{0,2})|[lL]{1,2}[uU]?)?'
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# Identifier regex with C and C++ Universal Character Name (UCN) support.
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_ident = r'(?!\d)(?:[\w$]|\\u[0-9a-fA-F]{4}|\\U[0-9a-fA-F]{8})+'
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_namespaced_ident = r'(?!\d)(?:[\w$]|\\u[0-9a-fA-F]{4}|\\U[0-9a-fA-F]{8}|::)+'
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# Single and multiline comment regexes
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# Beware not to use *? for the inner content! When these regexes
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# are embedded in larger regexes, that can cause the stuff*? to
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# match more than it would have if the regex had been used in
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# a standalone way ...
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_comment_single = r'//(?:.|(?<=\\)\n)*\n'
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_comment_multiline = r'/(?:\\\n)?[*](?:[^*]|[*](?!(?:\\\n)?/))*[*](?:\\\n)?/'
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# Regex to match optional comments
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_possible_comments = rf'\s*(?:(?:(?:{_comment_single})|(?:{_comment_multiline}))\s*)*'
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tokens = {
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'whitespace': [
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# preprocessor directives: without whitespace
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(r'^#if\s+0', Comment.Preproc, 'if0'),
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('^#', Comment.Preproc, 'macro'),
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# or with whitespace
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('^(' + _ws1 + r')(#if\s+0)',
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bygroups(using(this), Comment.Preproc), 'if0'),
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('^(' + _ws1 + ')(#)',
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bygroups(using(this), Comment.Preproc), 'macro'),
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# Labels:
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# Line start and possible indentation.
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(r'(^[ \t]*)'
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# Not followed by keywords which can be mistaken as labels.
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r'(?!(?:public|private|protected|default)\b)'
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# Actual label, followed by a single colon.
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r'(' + _ident + r')(\s*)(:)(?!:)',
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bygroups(Whitespace, Name.Label, Whitespace, Punctuation)),
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(r'\n', Whitespace),
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(r'[^\S\n]+', Whitespace),
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(r'\\\n', Text), # line continuation
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(_comment_single, Comment.Single),
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(_comment_multiline, Comment.Multiline),
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# Open until EOF, so no ending delimiter
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(r'/(\\\n)?[*][\w\W]*', Comment.Multiline),
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],
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'statements': [
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include('keywords'),
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include('types'),
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(r'([LuU]|u8)?(")', bygroups(String.Affix, String), 'string'),
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(r"([LuU]|u8)?(')(\\.|\\[0-7]{1,3}|\\x[a-fA-F0-9]{1,2}|[^\\\'\n])(')",
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bygroups(String.Affix, String.Char, String.Char, String.Char)),
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# Hexadecimal floating-point literals (C11, C++17)
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(r'0[xX](' + _hexpart + r'\.' + _hexpart + r'|\.' + _hexpart +
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r'|' + _hexpart + r')[pP][+-]?' + _hexpart + r'[lL]?', Number.Float),
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(r'(-)?(' + _decpart + r'\.' + _decpart + r'|\.' + _decpart + r'|' +
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_decpart + r')[eE][+-]?' + _decpart + r'[fFlL]?', Number.Float),
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(r'(-)?((' + _decpart + r'\.(' + _decpart + r')?|\.' +
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_decpart + r')[fFlL]?)|(' + _decpart + r'[fFlL])', Number.Float),
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(r'(-)?0[xX]' + _hexpart + _intsuffix, Number.Hex),
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(r'(-)?0[bB][01](\'?[01])*' + _intsuffix, Number.Bin),
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(r'(-)?0(\'?[0-7])+' + _intsuffix, Number.Oct),
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(r'(-)?' + _decpart + _intsuffix, Number.Integer),
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(r'[~!%^&*+=|?:<>/-]', Operator),
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(r'[()\[\],.]', Punctuation),
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(r'(true|false|NULL)\b', Name.Builtin),
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(_ident, Name)
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],
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'types': [
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(words(('int8', 'int16', 'int32', 'int64', 'wchar_t'), prefix=r'__',
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suffix=r'\b'), Keyword.Reserved),
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(words(('bool', 'int', 'long', 'float', 'short', 'double', 'char',
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'unsigned', 'signed', 'void', '_BitInt',
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'__int128'), suffix=r'\b'), Keyword.Type)
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],
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'keywords': [
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(r'(struct|union)(\s+)', bygroups(Keyword, Whitespace), 'classname'),
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(r'case\b', Keyword, 'case-value'),
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(words(('asm', 'auto', 'break', 'const', 'continue', 'default',
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'do', 'else', 'enum', 'extern', 'for', 'goto', 'if',
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'register', 'restricted', 'return', 'sizeof', 'struct',
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'static', 'switch', 'typedef', 'volatile', 'while', 'union',
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'thread_local', 'alignas', 'alignof', 'static_assert', '_Pragma'),
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suffix=r'\b'), Keyword),
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(words(('inline', '_inline', '__inline', 'naked', 'restrict',
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'thread'), suffix=r'\b'), Keyword.Reserved),
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# Vector intrinsics
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(r'(__m(128i|128d|128|64))\b', Keyword.Reserved),
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# Microsoft-isms
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(words((
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'asm', 'based', 'except', 'stdcall', 'cdecl',
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'fastcall', 'declspec', 'finally', 'try',
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'leave', 'w64', 'unaligned', 'raise', 'noop',
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'identifier', 'forceinline', 'assume'),
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prefix=r'__', suffix=r'\b'), Keyword.Reserved)
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],
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'root': [
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include('whitespace'),
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include('keywords'),
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# functions
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(r'(' + _namespaced_ident + r'(?:[&*\s])+)' # return arguments
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r'(' + _possible_comments + r')'
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r'(' + _namespaced_ident + r')' # method name
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r'(' + _possible_comments + r')'
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r'(\([^;"\')]*?\))' # signature
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r'(' + _possible_comments + r')'
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r'([^;{/"\']*)(\{)',
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bygroups(using(this), using(this, state='whitespace'),
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Name.Function, using(this, state='whitespace'),
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using(this), using(this, state='whitespace'),
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using(this), Punctuation),
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'function'),
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# function declarations
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(r'(' + _namespaced_ident + r'(?:[&*\s])+)' # return arguments
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r'(' + _possible_comments + r')'
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r'(' + _namespaced_ident + r')' # method name
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r'(' + _possible_comments + r')'
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r'(\([^;"\')]*?\))' # signature
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r'(' + _possible_comments + r')'
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r'([^;/"\']*)(;)',
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bygroups(using(this), using(this, state='whitespace'),
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Name.Function, using(this, state='whitespace'),
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using(this), using(this, state='whitespace'),
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using(this), Punctuation)),
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include('types'),
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default('statement'),
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],
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'statement': [
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include('whitespace'),
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include('statements'),
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(r'\}', Punctuation),
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(r'[{;]', Punctuation, '#pop'),
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],
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'function': [
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include('whitespace'),
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include('statements'),
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(';', Punctuation),
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(r'\{', Punctuation, '#push'),
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(r'\}', Punctuation, '#pop'),
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],
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'string': [
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(r'"', String, '#pop'),
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(r'\\([\\abfnrtv"\']|x[a-fA-F0-9]{2,4}|'
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r'u[a-fA-F0-9]{4}|U[a-fA-F0-9]{8}|[0-7]{1,3})', String.Escape),
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(r'[^\\"\n]+', String), # all other characters
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(r'\\\n', String), # line continuation
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(r'\\', String), # stray backslash
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],
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'macro': [
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(r'('+_ws1+r')(include)('+_ws1+r')("[^"]+")([^\n]*)',
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bygroups(using(this), Comment.Preproc, using(this),
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Comment.PreprocFile, Comment.Single)),
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(r'('+_ws1+r')(include)('+_ws1+r')(<[^>]+>)([^\n]*)',
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bygroups(using(this), Comment.Preproc, using(this),
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Comment.PreprocFile, Comment.Single)),
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(r'[^/\n]+', Comment.Preproc),
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(r'/[*](.|\n)*?[*]/', Comment.Multiline),
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(r'//.*?\n', Comment.Single, '#pop'),
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(r'/', Comment.Preproc),
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(r'(?<=\\)\n', Comment.Preproc),
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(r'\n', Comment.Preproc, '#pop'),
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],
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'if0': [
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(r'^\s*#if.*?(?<!\\)\n', Comment.Preproc, '#push'),
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(r'^\s*#el(?:se|if).*\n', Comment.Preproc, '#pop'),
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(r'^\s*#endif.*?(?<!\\)\n', Comment.Preproc, '#pop'),
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(r'.*?\n', Comment),
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],
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'classname': [
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(_ident, Name.Class, '#pop'),
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# template specification
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(r'\s*(?=>)', Text, '#pop'),
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default('#pop')
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],
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# Mark identifiers preceded by `case` keyword as constants.
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'case-value': [
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(r'(?<!:)(:)(?!:)', Punctuation, '#pop'),
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(_ident, Name.Constant),
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include('whitespace'),
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include('statements'),
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]
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}
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stdlib_types = {
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'size_t', 'ssize_t', 'off_t', 'wchar_t', 'ptrdiff_t', 'sig_atomic_t', 'fpos_t',
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'clock_t', 'time_t', 'va_list', 'jmp_buf', 'FILE', 'DIR', 'div_t', 'ldiv_t',
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'mbstate_t', 'wctrans_t', 'wint_t', 'wctype_t'}
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c99_types = {
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'int8_t', 'int16_t', 'int32_t', 'int64_t', 'uint8_t',
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'uint16_t', 'uint32_t', 'uint64_t', 'int_least8_t', 'int_least16_t',
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'int_least32_t', 'int_least64_t', 'uint_least8_t', 'uint_least16_t',
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'uint_least32_t', 'uint_least64_t', 'int_fast8_t', 'int_fast16_t', 'int_fast32_t',
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'int_fast64_t', 'uint_fast8_t', 'uint_fast16_t', 'uint_fast32_t', 'uint_fast64_t',
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'intptr_t', 'uintptr_t', 'intmax_t', 'uintmax_t'}
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linux_types = {
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'clockid_t', 'cpu_set_t', 'cpumask_t', 'dev_t', 'gid_t', 'id_t', 'ino_t', 'key_t',
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'mode_t', 'nfds_t', 'pid_t', 'rlim_t', 'sig_t', 'sighandler_t', 'siginfo_t',
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'sigset_t', 'sigval_t', 'socklen_t', 'timer_t', 'uid_t'}
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c11_atomic_types = {
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'atomic_bool', 'atomic_char', 'atomic_schar', 'atomic_uchar', 'atomic_short',
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'atomic_ushort', 'atomic_int', 'atomic_uint', 'atomic_long', 'atomic_ulong',
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'atomic_llong', 'atomic_ullong', 'atomic_char16_t', 'atomic_char32_t', 'atomic_wchar_t',
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'atomic_int_least8_t', 'atomic_uint_least8_t', 'atomic_int_least16_t',
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'atomic_uint_least16_t', 'atomic_int_least32_t', 'atomic_uint_least32_t',
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'atomic_int_least64_t', 'atomic_uint_least64_t', 'atomic_int_fast8_t',
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'atomic_uint_fast8_t', 'atomic_int_fast16_t', 'atomic_uint_fast16_t',
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'atomic_int_fast32_t', 'atomic_uint_fast32_t', 'atomic_int_fast64_t',
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'atomic_uint_fast64_t', 'atomic_intptr_t', 'atomic_uintptr_t', 'atomic_size_t',
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'atomic_ptrdiff_t', 'atomic_intmax_t', 'atomic_uintmax_t'}
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def __init__(self, **options):
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self.stdlibhighlighting = get_bool_opt(options, 'stdlibhighlighting', True)
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self.c99highlighting = get_bool_opt(options, 'c99highlighting', True)
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self.c11highlighting = get_bool_opt(options, 'c11highlighting', True)
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self.platformhighlighting = get_bool_opt(options, 'platformhighlighting', True)
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RegexLexer.__init__(self, **options)
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def get_tokens_unprocessed(self, text, stack=('root',)):
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for index, token, value in \
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RegexLexer.get_tokens_unprocessed(self, text, stack):
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if token is Name:
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if self.stdlibhighlighting and value in self.stdlib_types:
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token = Keyword.Type
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elif self.c99highlighting and value in self.c99_types:
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token = Keyword.Type
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elif self.c11highlighting and value in self.c11_atomic_types:
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token = Keyword.Type
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elif self.platformhighlighting and value in self.linux_types:
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token = Keyword.Type
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yield index, token, value
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class CLexer(CFamilyLexer):
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"""
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For C source code with preprocessor directives.
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Additional options accepted:
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`stdlibhighlighting`
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Highlight common types found in the C/C++ standard library (e.g. `size_t`).
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(default: ``True``).
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`c99highlighting`
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Highlight common types found in the C99 standard library (e.g. `int8_t`).
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Actually, this includes all fixed-width integer types.
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(default: ``True``).
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`c11highlighting`
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Highlight atomic types found in the C11 standard library (e.g. `atomic_bool`).
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(default: ``True``).
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`platformhighlighting`
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Highlight common types found in the platform SDK headers (e.g. `clockid_t` on Linux).
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(default: ``True``).
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"""
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name = 'C'
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aliases = ['c']
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filenames = ['*.c', '*.h', '*.idc', '*.x[bp]m']
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mimetypes = ['text/x-chdr', 'text/x-csrc', 'image/x-xbitmap', 'image/x-xpixmap']
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url = 'https://en.wikipedia.org/wiki/C_(programming_language)'
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version_added = ''
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priority = 0.1
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tokens = {
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'keywords': [
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(words((
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'_Alignas', '_Alignof', '_Noreturn', '_Generic', '_Thread_local',
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'_Static_assert', '_Imaginary', 'noreturn', 'imaginary', 'complex'),
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suffix=r'\b'), Keyword),
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inherit
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],
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'types': [
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(words(('_Bool', '_Complex', '_Atomic'), suffix=r'\b'), Keyword.Type),
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inherit
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]
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}
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def analyse_text(text):
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if re.search(r'^\s*#include [<"]', text, re.MULTILINE):
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return 0.1
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if re.search(r'^\s*#ifn?def ', text, re.MULTILINE):
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return 0.1
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class CppLexer(CFamilyLexer):
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"""
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|
For C++ source code with preprocessor directives.
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Additional options accepted:
|
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|
`stdlibhighlighting`
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|
Highlight common types found in the C/C++ standard library (e.g. `size_t`).
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|
(default: ``True``).
|
|
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|
`c99highlighting`
|
|
Highlight common types found in the C99 standard library (e.g. `int8_t`).
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|
Actually, this includes all fixed-width integer types.
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|
(default: ``True``).
|
|
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|
`c11highlighting`
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|
Highlight atomic types found in the C11 standard library (e.g. `atomic_bool`).
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|
(default: ``True``).
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|
`platformhighlighting`
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|
Highlight common types found in the platform SDK headers (e.g. `clockid_t` on Linux).
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(default: ``True``).
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"""
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name = 'C++'
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url = 'https://isocpp.org/'
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aliases = ['cpp', 'c++']
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filenames = ['*.cpp', '*.hpp', '*.c++', '*.h++',
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'*.cc', '*.hh', '*.cxx', '*.hxx',
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'*.C', '*.H', '*.cp', '*.CPP', '*.tpp']
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mimetypes = ['text/x-c++hdr', 'text/x-c++src']
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version_added = ''
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priority = 0.1
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tokens = {
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'statements': [
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# C++11 raw strings
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(r'((?:[LuU]|u8)?R)(")([^\\()\s]{,16})(\()((?:.|\n)*?)(\)\3)(")',
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bygroups(String.Affix, String, String.Delimiter, String.Delimiter,
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String, String.Delimiter, String)),
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inherit,
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],
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'root': [
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inherit,
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# C++ Microsoft-isms
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(words(('virtual_inheritance', 'uuidof', 'super', 'single_inheritance',
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'multiple_inheritance', 'interface', 'event'),
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prefix=r'__', suffix=r'\b'), Keyword.Reserved),
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# Offload C++ extensions, http://offload.codeplay.com/
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(r'__(offload|blockingoffload|outer)\b', Keyword.Pseudo),
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],
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'enumname': [
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include('whitespace'),
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# 'enum class' and 'enum struct' C++11 support
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(words(('class', 'struct'), suffix=r'\b'), Keyword),
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(CFamilyLexer._ident, Name.Class, '#pop'),
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# template specification
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(r'\s*(?=>)', Text, '#pop'),
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default('#pop')
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],
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'keywords': [
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(r'(class|concept|typename)(\s+)', bygroups(Keyword, Whitespace), 'classname'),
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(words((
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'catch', 'const_cast', 'delete', 'dynamic_cast', 'explicit',
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'export', 'friend', 'mutable', 'new', 'operator',
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'private', 'protected', 'public', 'reinterpret_cast', 'class',
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'__restrict', 'static_cast', 'template', 'this', 'throw', 'throws',
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'try', 'typeid', 'using', 'virtual', 'constexpr', 'nullptr', 'concept',
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'decltype', 'noexcept', 'override', 'final', 'constinit', 'consteval',
|
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'co_await', 'co_return', 'co_yield', 'requires', 'import', 'module',
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'typename', 'and', 'and_eq', 'bitand', 'bitor', 'compl', 'not',
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'not_eq', 'or', 'or_eq', 'xor', 'xor_eq'),
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suffix=r'\b'), Keyword),
|
|
(r'namespace\b', Keyword, 'namespace'),
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|
(r'(enum)(\s+)', bygroups(Keyword, Whitespace), 'enumname'),
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inherit
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],
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'types': [
|
|
(r'char(16_t|32_t|8_t)\b', Keyword.Type),
|
|
inherit
|
|
],
|
|
'namespace': [
|
|
(r'[;{]', Punctuation, ('#pop', 'root')),
|
|
(r'inline\b', Keyword.Reserved),
|
|
(CFamilyLexer._ident, Name.Namespace),
|
|
include('statement')
|
|
]
|
|
}
|
|
|
|
def analyse_text(text):
|
|
if re.search('#include <[a-z_]+>', text):
|
|
return 0.2
|
|
if re.search('using namespace ', text):
|
|
return 0.4
|