124 lines
3.1 KiB
Python
124 lines
3.1 KiB
Python
"""
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pygments.lexers.elm
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~~~~~~~~~~~~~~~~~~~
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Lexer for the Elm 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, include, bygroups
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from pygments.token import Comment, Keyword, Name, Number, Punctuation, \
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String, Whitespace
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__all__ = ['ElmLexer']
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class ElmLexer(RegexLexer):
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"""
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For Elm source code.
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"""
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name = 'Elm'
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url = 'https://elm-lang.org/'
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aliases = ['elm']
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filenames = ['*.elm']
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mimetypes = ['text/x-elm']
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version_added = '2.1'
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validName = r'[a-z_][a-zA-Z0-9_\']*'
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specialName = r'^main '
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builtinOps = (
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'~', '||', '|>', '|', '`', '^', '\\', '\'', '>>', '>=', '>', '==',
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'=', '<~', '<|', '<=', '<<', '<-', '<', '::', ':', '/=', '//', '/',
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'..', '.', '->', '-', '++', '+', '*', '&&', '%',
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)
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reservedWords = words((
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'alias', 'as', 'case', 'else', 'if', 'import', 'in',
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'let', 'module', 'of', 'port', 'then', 'type', 'where',
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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'\{-', Comment.Multiline, 'comment'),
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(r'--.*', Comment.Single),
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# Whitespace
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(r'\s+', Whitespace),
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# Strings
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(r'"', String, 'doublequote'),
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# Modules
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(r'^(\s*)(module)(\s*)', bygroups(Whitespace, Keyword.Namespace,
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Whitespace), 'imports'),
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# Imports
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(r'^(\s*)(import)(\s*)', bygroups(Whitespace, Keyword.Namespace,
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Whitespace), 'imports'),
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# Shaders
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(r'\[glsl\|.*', Name.Entity, 'shader'),
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# Keywords
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(reservedWords, Keyword.Reserved),
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# Types
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(r'[A-Z][a-zA-Z0-9_]*', Keyword.Type),
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# Main
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(specialName, Keyword.Reserved),
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# Prefix Operators
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(words((builtinOps), prefix=r'\(', suffix=r'\)'), Name.Function),
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# Infix Operators
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(words(builtinOps), Name.Function),
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# Numbers
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include('numbers'),
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# Variable Names
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(validName, Name.Variable),
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# Parens
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(r'[,()\[\]{}]', Punctuation),
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],
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'comment': [
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(r'-(?!\})', Comment.Multiline),
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(r'\{-', Comment.Multiline, 'comment'),
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(r'[^-}]', Comment.Multiline),
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(r'-\}', Comment.Multiline, '#pop'),
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],
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'doublequote': [
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(r'\\u[0-9a-fA-F]{4}', String.Escape),
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(r'\\[nrfvb\\"]', String.Escape),
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(r'[^"]', String),
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(r'"', String, '#pop'),
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],
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'imports': [
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(r'\w+(\.\w+)*', Name.Class, '#pop'),
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],
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'numbers': [
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(r'_?\d+\.(?=\d+)', Number.Float),
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(r'_?\d+', Number.Integer),
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],
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'shader': [
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(r'\|(?!\])', Name.Entity),
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(r'\|\]', Name.Entity, '#pop'),
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(r'(.*)(\n)', bygroups(Name.Entity, Whitespace)),
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],
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}
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