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"""
pygments.lexers.meson
~~~~~~~~~~~~~~~~~~~~~
Pygments lexer for the Meson build system
:copyright: Copyright 2006-2025 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
from pygments.lexer import RegexLexer, words, include
from pygments.token import Comment, Name, Number, Punctuation, Operator, \
Keyword, String, Whitespace
__all__ = ['MesonLexer']
class MesonLexer(RegexLexer):
"""Meson language lexer.
The grammar definition use to transcribe the syntax was retrieved from
https://mesonbuild.com/Syntax.html#grammar for version 0.58.
Some of those definitions are improperly transcribed, so the Meson++
implementation was also checked: https://github.com/dcbaker/meson-plus-plus.
"""
# TODO String interpolation @VARNAME@ inner matches
# TODO keyword_arg: value inner matches
name = 'Meson'
url = 'https://mesonbuild.com/'
aliases = ['meson', 'meson.build']
filenames = ['meson.build', 'meson_options.txt']
mimetypes = ['text/x-meson']
version_added = '2.10'
tokens = {
'root': [
(r'#.*?$', Comment),
(r"'''.*'''", String.Single),
(r'[1-9][0-9]*', Number.Integer),
(r'0o[0-7]+', Number.Oct),
(r'0x[a-fA-F0-9]+', Number.Hex),
include('string'),
include('keywords'),
include('expr'),
(r'[a-zA-Z_][a-zA-Z_0-9]*', Name),
(r'\s+', Whitespace),
],
'string': [
(r"[']{3}([']{0,2}([^\\']|\\(.|\n)))*[']{3}", String),
(r"'.*?(?<!\\)(\\\\)*?'", String),
],
'keywords': [
(words((
'if',
'elif',
'else',
'endif',
'foreach',
'endforeach',
'break',
'continue',
),
suffix=r'\b'), Keyword),
],
'expr': [
(r'(in|and|or|not)\b', Operator.Word),
(r'(\*=|/=|%=|\+]=|-=|==|!=|\+|-|=)', Operator),
(r'[\[\]{}:().,?]', Punctuation),
(words(('true', 'false'), suffix=r'\b'), Keyword.Constant),
include('builtins'),
(words((
'meson',
'build_machine',
'host_machine',
'target_machine',
),
suffix=r'\b'), Name.Variable.Magic),
],
'builtins': [
# This list was extracted from the v0.58 reference manual
(words((
'add_global_arguments',
'add_global_link_arguments',
'add_languages',
'add_project_arguments',
'add_project_link_arguments',
'add_test_setup',
'assert',
'benchmark',
'both_libraries',
'build_target',
'configuration_data',
'configure_file',
'custom_target',
'declare_dependency',
'dependency',
'disabler',
'environment',
'error',
'executable',
'files',
'find_library',
'find_program',
'generator',
'get_option',
'get_variable',
'include_directories',
'install_data',
'install_headers',
'install_man',
'install_subdir',
'is_disabler',
'is_variable',
'jar',
'join_paths',
'library',
'message',
'project',
'range',
'run_command',
'set_variable',
'shared_library',
'shared_module',
'static_library',
'subdir',
'subdir_done',
'subproject',
'summary',
'test',
'vcs_tag',
'warning',
),
prefix=r'(?<!\.)',
suffix=r'\b'), Name.Builtin),
(r'(?<!\.)import\b', Name.Namespace),
],
}