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"""
pygments.lexers.carbon
~~~~~~~~~~~~~~~~~~~~~~
Lexers for the Carbon programming language.
:copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
import re
from pygments.lexer import RegexLexer, bygroups, words
from pygments.token import Text, Comment, Operator, Keyword, Name, String, \
Number, Punctuation, Whitespace
__all__ = ['CarbonLexer']
class CarbonLexer(RegexLexer):
"""
For Carbon source.
.. versionadded:: 2.15.0
"""
name = 'Carbon'
url = 'https://github.com/carbon-language/carbon-lang'
filenames = ['*.carbon']
aliases = ['carbon']
mimetypes = ['text/x-carbon']
flags = re.MULTILINE | re.DOTALL
tokens = {
'root': [
(r'\n', Whitespace),
(r'\s+', Whitespace),
(r'\\\n', Text),
# comments
(r'//(.*?)\n', Comment.Single),
(r'/(\\\n)?[*](.|\n)*?[*](\\\n)?/', Comment.Multiline),
# Declaration
(r'(package|import|api|namespace|library)\b', Keyword.Namespace),
(r'(abstract|alias|fn|class|interface|let|var|virtual|external|'
r'base|addr|extends|choice|constraint|impl)\b', Keyword.Declaration),
# Keywords
(words(('as', 'or', 'not', 'and', 'break', 'continue', 'case',
'default', 'if', 'else', 'destructor', 'for', 'forall',
'while', 'where', 'then', 'in', 'is', 'return', 'returned',
'friend', 'partial', 'private', 'protected', 'observe',
'override', 'Self'), suffix=r'\b'), Keyword),
(r'(self)\b', Keyword.Pseudo),
(r'(true|false)\b', Keyword.Constant),
(r'(auto|bool|string|i8|i16|i32|i64|u8|u16|u32|u64|'
r'f8|f16|f32|f64)\b', Keyword.Type),
# numeric literals
(r'[0-9]*[.][0-9]+', Number.Double),
(r'0b[01]+[sl]?', Number.Bin),
(r'0o[0-7]+[sl]?', Number.Oct),
(r'[0-9]+', Number.Integer),
# string literal
(r'"(\\.|[^"\\])*"', String),
# char literal
(r'\'(\\.|[^\'\\])\'', String.Char),
# tokens
(r'<<=|>>=|<<|>>|<=|>=|\+=|-=|\*=|/=|\%=|\|=|&=|\^=|&&|\|\||&|\||'
r'\+\+|--|\%|\^|\~|==|!=|::|[.]{3}|->|=>|[+\-*/&]', Operator),
(r'[|<>=!()\[\]{}.,;:\?]', Punctuation),
# identifiers
(r'[^\W\d]\w*', Name.Other),
]
}
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