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"""
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pygments.lexers.gleam
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~~~~~~~~~~~~~~~~~~~~~
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Lexer for the Gleam programming language.
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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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from pygments.lexer import RegexLexer, words, bygroups
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from pygments.token import Comment, Operator, Keyword, Name, String, \
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Number, Punctuation, Whitespace
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__all__ = ['GleamLexer']
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class GleamLexer(RegexLexer):
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"""
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Lexer for the Gleam programming language (version 1.0.0).
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"""
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name = 'Gleam'
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url = 'https://gleam.run/'
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filenames = ['*.gleam']
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aliases = ['gleam']
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mimetypes = ['text/x-gleam']
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version_added = '2.19'
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keywords = words((
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'as', 'assert', 'auto', 'case', 'const', 'delegate', 'derive', 'echo',
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'else', 'fn', 'if', 'implement', 'import', 'let', 'macro', 'opaque',
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'panic', 'pub', 'test', 'todo', 'type', 'use',
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), suffix=r'\b')
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tokens = {
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'root': [
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# Comments
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(r'(///.*?)(\n)', bygroups(String.Doc, Whitespace)),
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(r'(//.*?)(\n)', bygroups(Comment.Single, Whitespace)),
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# Keywords
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(keywords, Keyword),
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(r'([a-zA-Z_]+)(\.)', bygroups(Keyword, Punctuation)),
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# Punctuation
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(r'[()\[\]{}:;,@]+', Punctuation),
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(r'(#|!=|!|==|\|>|\|\||\||\->|<\-|&&|<<|>>|\.\.|\.|=)', Punctuation),
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# Operators
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(r'(<>|\+\.?|\-\.?|\*\.?|/\.?|%\.?|<=\.?|>=\.?|<\.?|>\.?|=)', Operator),
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# Strings
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(r'"(\\"|[^"])*"', String),
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# Identifiers
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(r'\b(let)(\s+)(\w+)', bygroups(Keyword, Whitespace, Name.Variable)),
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(r'\b(fn)(\s+)(\w+)', bygroups(Keyword, Whitespace, Name.Function)),
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(r'[a-zA-Z_/]\w*', Name),
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# numbers
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(r'(\d+(_\d+)*\.(?!\.)(\d+(_\d+)*)?|\.\d+(_\d+)*)([eEf][+-]?[0-9]+)?', Number.Float),
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(r'\d+(_\d+)*[eEf][+-]?[0-9]+', Number.Float),
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(r'0[xX][a-fA-F0-9]+(_[a-fA-F0-9]+)*(\.([a-fA-F0-9]+(_[a-fA-F0-9]+)*)?)?p[+-]?\d+', Number.Float),
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(r'0[bB][01]+(_[01]+)*', Number.Bin),
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(r'0[oO][0-7]+(_[0-7]+)*', Number.Oct),
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(r'0[xX][a-fA-F0-9]+(_[a-fA-F0-9]+)*', Number.Hex),
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(r'\d+(_\d+)*', Number.Integer),
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# Whitespace
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(r'\s+', Whitespace),
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],
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}
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