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98 lines
3.7 KiB
Python
98 lines
3.7 KiB
Python
"""
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pygments.lexers.go
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~~~~~~~~~~~~~~~~~~
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Lexers for the Google Go language.
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:copyright: Copyright 2006-2023 by the Pygments team, see AUTHORS.
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:license: BSD, see LICENSE for details.
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"""
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from pygments.lexer import RegexLexer, bygroups, words
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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__ = ['GoLexer']
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class GoLexer(RegexLexer):
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"""
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For Go source.
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.. versionadded:: 1.2
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"""
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name = 'Go'
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url = 'https://go.dev/'
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filenames = ['*.go']
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aliases = ['go', 'golang']
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mimetypes = ['text/x-gosrc']
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tokens = {
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'root': [
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(r'\n', Whitespace),
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(r'\s+', Whitespace),
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(r'(\\)(\n)', bygroups(Text, Whitespace)), # line continuations
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(r'//(.*?)$', Comment.Single),
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(r'/(\\\n)?[*](.|\n)*?[*](\\\n)?/', Comment.Multiline),
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(r'(import|package)\b', Keyword.Namespace),
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(r'(var|func|struct|map|chan|type|interface|const)\b',
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Keyword.Declaration),
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(words((
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'break', 'default', 'select', 'case', 'defer', 'go',
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'else', 'goto', 'switch', 'fallthrough', 'if', 'range',
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'continue', 'for', 'return'), suffix=r'\b'),
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Keyword),
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(r'(true|false|iota|nil)\b', Keyword.Constant),
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# It seems the builtin types aren't actually keywords, but
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# can be used as functions. So we need two declarations.
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(words((
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'uint', 'uint8', 'uint16', 'uint32', 'uint64',
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'int', 'int8', 'int16', 'int32', 'int64',
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'float', 'float32', 'float64',
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'complex64', 'complex128', 'byte', 'rune',
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'string', 'bool', 'error', 'uintptr', 'any', 'comparable',
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'print', 'println', 'panic', 'recover', 'close', 'complex',
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'real', 'imag', 'len', 'cap', 'append', 'copy', 'delete',
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'new', 'make', 'min', 'max', 'clear'), suffix=r'\b(\()'),
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bygroups(Name.Builtin, Punctuation)),
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(words((
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'uint', 'uint8', 'uint16', 'uint32', 'uint64',
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'int', 'int8', 'int16', 'int32', 'int64',
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'float', 'float32', 'float64',
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'complex64', 'complex128', 'byte', 'rune',
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'string', 'bool', 'error', 'uintptr', 'any', 'comparable'), suffix=r'\b'),
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Keyword.Type),
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# imaginary_lit
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(r'\d+i', Number),
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(r'\d+\.\d*([Ee][-+]\d+)?i', Number),
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(r'\.\d+([Ee][-+]\d+)?i', Number),
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(r'\d+[Ee][-+]\d+i', Number),
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# float_lit
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(r'\d+(\.\d+[eE][+\-]?\d+|'
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r'\.\d*|[eE][+\-]?\d+)', Number.Float),
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(r'\.\d+([eE][+\-]?\d+)?', Number.Float),
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# int_lit
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# -- octal_lit
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(r'0[0-7]+', Number.Oct),
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# -- hex_lit
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(r'0[xX][0-9a-fA-F]+', Number.Hex),
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# -- decimal_lit
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(r'(0|[1-9][0-9]*)', Number.Integer),
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# char_lit
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(r"""'(\\['"\\abfnrtv]|\\x[0-9a-fA-F]{2}|\\[0-7]{1,3}"""
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r"""|\\u[0-9a-fA-F]{4}|\\U[0-9a-fA-F]{8}|[^\\])'""",
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String.Char),
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# StringLiteral
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# -- raw_string_lit
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(r'`[^`]*`', String),
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# -- interpreted_string_lit
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(r'"(\\\\|\\[^\\]|[^"\\])*"', String),
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# Tokens
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(r'(<<=|>>=|<<|>>|<=|>=|&\^=|&\^|\+=|-=|\*=|/=|%=|&=|\|=|&&|\|\|'
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r'|<-|\+\+|--|==|!=|:=|\.\.\.|[+\-*/%&]'
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r'|~|\|)', Operator),
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(r'[|^<>=!()\[\]{}.,;:]', Punctuation),
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# identifier
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(r'[^\W\d]\w*', Name.Other),
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]
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}
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