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"""
pygments.lexers.chapel
~~~~~~~~~~~~~~~~~~~~~~
Lexer for the Chapel language.
:copyright: Copyright 2006-2023 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
from pygments.lexer import RegexLexer, bygroups, words
from pygments.token import Text, Comment, Operator, Keyword, Name, String, \
Number, Punctuation, Whitespace
__all__ = ['ChapelLexer']
class ChapelLexer(RegexLexer):
"""
For Chapel source.
.. versionadded:: 2.0
"""
name = 'Chapel'
url = 'https://chapel-lang.org/'
filenames = ['*.chpl']
aliases = ['chapel', 'chpl']
# mimetypes = ['text/x-chapel']
known_types = ('bool', 'bytes', 'complex', 'imag', 'int', 'locale',
'nothing', 'opaque', 'range', 'real', 'string', 'uint',
'void')
type_modifiers_par = ('atomic', 'single', 'sync')
type_modifiers_mem = ('borrowed', 'owned', 'shared', 'unmanaged')
type_modifiers = (*type_modifiers_par, *type_modifiers_mem)
declarations = ('config', 'const', 'in', 'inout', 'out', 'param', 'ref',
'type', 'var')
constants = ('false', 'nil', 'none', 'true')
other_keywords = ('align', 'as',
'begin', 'break', 'by',
'catch', 'cobegin', 'coforall', 'continue',
'defer', 'delete', 'dmapped', 'do', 'domain',
'else', 'enum', 'except', 'export', 'extern',
'for', 'forall', 'foreach', 'forwarding',
'if', 'implements', 'import', 'index', 'init', 'inline',
'label', 'lambda', 'let', 'lifetime', 'local',
'new', 'noinit',
'on', 'only', 'otherwise', 'override',
'pragma', 'primitive', 'private', 'prototype', 'public',
'reduce', 'require', 'return',
'scan', 'select', 'serial', 'sparse', 'subdomain',
'then', 'this', 'throw', 'throws', 'try',
'use',
'when', 'where', 'while', 'with',
'yield',
'zip')
tokens = {
'root': [
(r'\n', Whitespace),
(r'\s+', Whitespace),
(r'\\\n', Text),
(r'//(.*?)\n', Comment.Single),
(r'/(\\\n)?[*](.|\n)*?[*](\\\n)?/', Comment.Multiline),
(words(declarations, suffix=r'\b'), Keyword.Declaration),
(words(constants, suffix=r'\b'), Keyword.Constant),
(words(known_types, suffix=r'\b'), Keyword.Type),
(words((*type_modifiers, *other_keywords), suffix=r'\b'), Keyword),
(r'@', Keyword, 'attributename'),
(r'(iter)(\s+)', bygroups(Keyword, Whitespace), 'procname'),
(r'(proc)(\s+)', bygroups(Keyword, Whitespace), 'procname'),
(r'(operator)(\s+)', bygroups(Keyword, Whitespace), 'procname'),
(r'(class|interface|module|record|union)(\s+)', bygroups(Keyword, Whitespace),
'classname'),
# imaginary integers
(r'\d+i', Number),
(r'\d+\.\d*([Ee][-+]\d+)?i', Number),
(r'\.\d+([Ee][-+]\d+)?i', Number),
(r'\d+[Ee][-+]\d+i', Number),
# reals cannot end with a period due to lexical ambiguity with
# .. operator. See reference for rationale.
(r'(\d*\.\d+)([eE][+-]?[0-9]+)?i?', Number.Float),
(r'\d+[eE][+-]?[0-9]+i?', Number.Float),
# integer literals
# -- binary
(r'0[bB][01]+', Number.Bin),
# -- hex
(r'0[xX][0-9a-fA-F]+', Number.Hex),
# -- octal
(r'0[oO][0-7]+', Number.Oct),
# -- decimal
(r'[0-9]+', Number.Integer),
# strings
(r'"(\\\\|\\"|[^"])*"', String),
(r"'(\\\\|\\'|[^'])*'", String),
# tokens
(r'(=|\+=|-=|\*=|/=|\*\*=|%=|&=|\|=|\^=|&&=|\|\|=|<<=|>>=|'
r'<=>|<~>|\.\.|by|#|\.\.\.|'
r'&&|\|\||!|&|\||\^|~|<<|>>|'
r'==|!=|<=|>=|<|>|'
r'[+\-*/%]|\*\*)', Operator),
(r'[:;,.?()\[\]{}]', Punctuation),
# identifiers
(r'[a-zA-Z_][\w$]*', Name.Other),
],
'classname': [
(r'[a-zA-Z_][\w$]*', Name.Class, '#pop'),
],
'procname': [
(r'([a-zA-Z_][.\w$]*|' # regular function name, including secondary
r'\~[a-zA-Z_][.\w$]*|' # support for legacy destructors
r'[+*/!~%<>=&^|\-:]{1,2})', # operators
Name.Function, '#pop'),
# allow `proc (atomic T).foo`
(r'\(', Punctuation, "receivertype"),
(r'\)+\.', Punctuation),
],
'receivertype': [
(words(type_modifiers, suffix=r'\b'), Keyword),
(words(known_types, suffix=r'\b'), Keyword.Type),
(r'[^()]*', Name.Other, '#pop'),
],
'attributename': [
(r'[a-zA-Z_][.\w$]*', Name.Decorator, '#pop'),
],
}
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