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"""
pygments.lexers.func
~~~~~~~~~~~~~~~~~~~~
Lexers for FunC.
:copyright: Copyright 2006-2025 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
from pygments.lexer import RegexLexer, include, words
from pygments.token import Text, Comment, Operator, Keyword, Name, String, \
Number, Whitespace, Punctuation
__all__ = ['FuncLexer']
class FuncLexer(RegexLexer):
"""
For FunC source code.
"""
name = 'FunC'
aliases = ['func', 'fc']
filenames = ['*.fc', '*.func']
url = 'https://docs.ton.org/develop/func/overview'
version_added = ''
# 1. Does not start from "
# 2. Can start from ` and end with `, containing any character
# 3. Starts with underscore or { or } and have more than 1 character after it
# 4. Starts with letter, contains letters, numbers and underscores
identifier = r'(?!")(`([^`]+)`|((?=_)_|(?=\{)\{|(?=\})\}|(?![_`{}]))([^;,\[\]\(\)\s~.]+))'
tokens = {
'root': [
(r'\n', Whitespace),
(r'\s+', Whitespace),
include('keywords'),
include('strings'),
include('directives'),
include('numeric'),
include('comments'),
include('storage'),
include('functions'),
include('variables'),
(r'[.;(),\[\]~{}]', Punctuation)
],
'keywords': [
(words((
'<=>', '>=', '<=', '!=', '==', '^>>', '~>>',
'>>', '<<', '/%', '^%', '~%', '^/', '~/', '+=',
'-=', '*=', '/=', '~/=', '^/=', '%=', '^%=', '<<=',
'>>=', '~>>=', '^>>=', '&=', '|=', '^=', '^', '=',
'~', '/', '%', '-', '*', '+','>',
'<', '&', '|', ':', '?'), prefix=r'(?<=\s)', suffix=r'(?=\s)'),
Operator),
(words((
'if', 'ifnot',
'else', 'elseif', 'elseifnot',
'while', 'do', 'until', 'repeat',
'return', 'impure', 'method_id',
'forall', 'asm', 'inline', 'inline_ref'), prefix=r'\b', suffix=r'\b'),
Keyword),
(words(('true', 'false'), prefix=r'\b', suffix=r'\b'), Keyword.Constant),
],
'directives': [
(r'#include|#pragma', Keyword, 'directive'),
],
'directive': [
include('strings'),
(r'\s+', Whitespace),
(r'version|not-version', Keyword),
(r'(>=|<=|=|>|<|\^)?([0-9]+)(.[0-9]+)?(.[0-9]+)?', Number), # version
(r';', Text, '#pop')
],
'strings': [
(r'\"([^\n\"]+)\"[Hhcusa]?', String),
],
'numeric': [
(r'\b(-?(?!_)([\d_]+|0x[\d_a-fA-F]+)|0b[1_0]+)(?<!_)(?=[\s\)\],;])', Number)
],
'comments': [
(r';;([^\n]*)', Comment.Singleline),
(r'\{-', Comment.Multiline, 'comment'),
],
'comment': [
(r'[^-}{]+', Comment.Multiline),
(r'\{-', Comment.Multiline, '#push'),
(r'-\}', Comment.Multiline, '#pop'),
(r'[-}{]', Comment.Multiline),
],
'storage': [
(words((
'var', 'int', 'slice', 'tuple',
'cell', 'builder', 'cont', '_'),
prefix=r'\b', suffix=r'(?=[\s\(\),\[\]])'),
Keyword.Type),
(words(('global', 'const'), prefix=r'\b', suffix=r'\b'), Keyword.Constant),
],
'variables': [
(identifier, Name.Variable),
],
'functions': [
# identifier followed by (
(identifier + r'(?=[\(])', Name.Function),
]
}