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140 lines
5.0 KiB
Python
140 lines
5.0 KiB
Python
"""
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pygments.lexers.chapel
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~~~~~~~~~~~~~~~~~~~~~~
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Lexer for the Chapel 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, 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__ = ['ChapelLexer']
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class ChapelLexer(RegexLexer):
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"""
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For Chapel source.
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"""
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name = 'Chapel'
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url = 'https://chapel-lang.org/'
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filenames = ['*.chpl']
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aliases = ['chapel', 'chpl']
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version_added = '2.0'
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# mimetypes = ['text/x-chapel']
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known_types = ('bool', 'bytes', 'complex', 'imag', 'int', 'locale',
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'nothing', 'opaque', 'range', 'real', 'string', 'uint',
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'void')
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type_modifiers_par = ('atomic', 'single', 'sync')
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type_modifiers_mem = ('borrowed', 'owned', 'shared', 'unmanaged')
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type_modifiers = (*type_modifiers_par, *type_modifiers_mem)
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declarations = ('config', 'const', 'in', 'inout', 'out', 'param', 'ref',
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'type', 'var')
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constants = ('false', 'nil', 'none', 'true')
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other_keywords = ('align', 'as',
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'begin', 'break', 'by',
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'catch', 'cobegin', 'coforall', 'continue',
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'defer', 'delete', 'dmapped', 'do', 'domain',
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'else', 'enum', 'except', 'export', 'extern',
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'for', 'forall', 'foreach', 'forwarding',
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'if', 'implements', 'import', 'index', 'init', 'inline',
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'label', 'lambda', 'let', 'lifetime', 'local',
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'new', 'noinit',
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'on', 'only', 'otherwise', 'override',
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'pragma', 'primitive', 'private', 'prototype', 'public',
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'reduce', 'require', 'return',
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'scan', 'select', 'serial', 'sparse', 'subdomain',
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'then', 'this', 'throw', 'throws', 'try',
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'use',
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'when', 'where', 'while', 'with',
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'yield',
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'zip')
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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', Text),
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(r'//(.*?)\n', Comment.Single),
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(r'/(\\\n)?[*](.|\n)*?[*](\\\n)?/', Comment.Multiline),
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(words(declarations, suffix=r'\b'), Keyword.Declaration),
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(words(constants, suffix=r'\b'), Keyword.Constant),
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(words(known_types, suffix=r'\b'), Keyword.Type),
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(words((*type_modifiers, *other_keywords), suffix=r'\b'), Keyword),
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(r'@', Keyword, 'attributename'),
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(r'(iter)(\s+)', bygroups(Keyword, Whitespace), 'procname'),
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(r'(proc)(\s+)', bygroups(Keyword, Whitespace), 'procname'),
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(r'(operator)(\s+)', bygroups(Keyword, Whitespace), 'procname'),
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(r'(class|interface|module|record|union)(\s+)', bygroups(Keyword, Whitespace),
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'classname'),
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# imaginary integers
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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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# reals cannot end with a period due to lexical ambiguity with
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# .. operator. See reference for rationale.
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(r'(\d*\.\d+)([eE][+-]?[0-9]+)?i?', Number.Float),
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(r'\d+[eE][+-]?[0-9]+i?', Number.Float),
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# integer literals
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# -- binary
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(r'0[bB][01]+', Number.Bin),
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# -- hex
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(r'0[xX][0-9a-fA-F]+', Number.Hex),
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# -- octal
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(r'0[oO][0-7]+', Number.Oct),
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# -- decimal
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(r'[0-9]+', Number.Integer),
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# strings
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(r'"(\\\\|\\"|[^"])*"', String),
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(r"'(\\\\|\\'|[^'])*'", String),
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# tokens
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(r'(=|\+=|-=|\*=|/=|\*\*=|%=|&=|\|=|\^=|&&=|\|\|=|<<=|>>=|'
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r'<=>|<~>|\.\.|by|#|\.\.\.|'
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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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# identifiers
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(r'[a-zA-Z_][\w$]*', Name.Other),
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],
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'classname': [
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(r'[a-zA-Z_][\w$]*', Name.Class, '#pop'),
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],
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'procname': [
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(r'([a-zA-Z_][.\w$]*|' # regular function name, including secondary
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r'\~[a-zA-Z_][.\w$]*|' # support for legacy destructors
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r'[+*/!~%<>=&^|\-:]{1,2})', # operators
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Name.Function, '#pop'),
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# allow `proc (atomic T).foo`
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(r'\(', Punctuation, "receivertype"),
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(r'\)+\.', Punctuation),
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],
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'receivertype': [
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(words(type_modifiers, suffix=r'\b'), Keyword),
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(words(known_types, suffix=r'\b'), Keyword.Type),
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(r'[^()]*', Name.Other, '#pop'),
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],
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'attributename': [
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(r'[a-zA-Z_][.\w$]*', Name.Decorator, '#pop'),
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],
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}
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