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"""
pygments.lexers.gleam
~~~~~~~~~~~~~~~~~~~~~
Lexer for the Gleam programming language.
:copyright: Copyright 2006-2025 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
from pygments.lexer import RegexLexer, words, bygroups
from pygments.token import Comment, Operator, Keyword, Name, String, \
Number, Punctuation, Whitespace
__all__ = ['GleamLexer']
class GleamLexer(RegexLexer):
"""
Lexer for the Gleam programming language (version 1.0.0).
"""
name = 'Gleam'
url = 'https://gleam.run/'
filenames = ['*.gleam']
aliases = ['gleam']
mimetypes = ['text/x-gleam']
version_added = '2.19'
keywords = words((
'as', 'assert', 'auto', 'case', 'const', 'delegate', 'derive', 'echo',
'else', 'fn', 'if', 'implement', 'import', 'let', 'macro', 'opaque',
'panic', 'pub', 'test', 'todo', 'type', 'use',
), suffix=r'\b')
tokens = {
'root': [
# Comments
(r'(///.*?)(\n)', bygroups(String.Doc, Whitespace)),
(r'(//.*?)(\n)', bygroups(Comment.Single, Whitespace)),
# Keywords
(keywords, Keyword),
(r'([a-zA-Z_]+)(\.)', bygroups(Keyword, Punctuation)),
# Punctuation
(r'[()\[\]{}:;,@]+', Punctuation),
(r'(#|!=|!|==|\|>|\|\||\||\->|<\-|&&|<<|>>|\.\.|\.|=)', Punctuation),
# Operators
(r'(<>|\+\.?|\-\.?|\*\.?|/\.?|%\.?|<=\.?|>=\.?|<\.?|>\.?|=)', Operator),
# Strings
(r'"(\\"|[^"])*"', String),
# Identifiers
(r'\b(let)(\s+)(\w+)', bygroups(Keyword, Whitespace, Name.Variable)),
(r'\b(fn)(\s+)(\w+)', bygroups(Keyword, Whitespace, Name.Function)),
(r'[a-zA-Z_/]\w*', Name),
# numbers
(r'(\d+(_\d+)*\.(?!\.)(\d+(_\d+)*)?|\.\d+(_\d+)*)([eEf][+-]?[0-9]+)?', Number.Float),
(r'\d+(_\d+)*[eEf][+-]?[0-9]+', Number.Float),
(r'0[xX][a-fA-F0-9]+(_[a-fA-F0-9]+)*(\.([a-fA-F0-9]+(_[a-fA-F0-9]+)*)?)?p[+-]?\d+', Number.Float),
(r'0[bB][01]+(_[01]+)*', Number.Bin),
(r'0[oO][0-7]+(_[0-7]+)*', Number.Oct),
(r'0[xX][a-fA-F0-9]+(_[a-fA-F0-9]+)*', Number.Hex),
(r'\d+(_\d+)*', Number.Integer),
# Whitespace
(r'\s+', Whitespace),
],
}