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112 lines
3.7 KiB
Python
112 lines
3.7 KiB
Python
2 years ago
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"""
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pygments.lexers.futhark
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~~~~~~~~~~~~~~~~~~~~~~~
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Lexer for the Futhark language
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:copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
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:license: BSD, see LICENSE for details.
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"""
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import re
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from pygments.lexer import RegexLexer, bygroups
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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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from pygments import unistring as uni
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__all__ = ['FutharkLexer']
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line_re = re.compile('.*?\n')
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class FutharkLexer(RegexLexer):
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"""
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A Futhark lexer
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.. versionadded:: 2.8
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"""
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name = 'Futhark'
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url = 'https://futhark-lang.org/'
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aliases = ['futhark']
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filenames = ['*.fut']
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mimetypes = ['text/x-futhark']
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num_types = ('i8', 'i16', 'i32', 'i64', 'u8', 'u16', 'u32', 'u64', 'f32', 'f64')
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other_types = ('bool', )
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reserved = ('if', 'then', 'else', 'def', 'let', 'loop', 'in', 'with',
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'type', 'type~', 'type^',
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'val', 'entry', 'for', 'while', 'do', 'case', 'match',
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'include', 'import', 'module', 'open', 'local', 'assert', '_')
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ascii = ('NUL', 'SOH', '[SE]TX', 'EOT', 'ENQ', 'ACK',
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'BEL', 'BS', 'HT', 'LF', 'VT', 'FF', 'CR', 'S[OI]', 'DLE',
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'DC[1-4]', 'NAK', 'SYN', 'ETB', 'CAN',
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'EM', 'SUB', 'ESC', '[FGRU]S', 'SP', 'DEL')
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num_postfix = r'(%s)?' % '|'.join(num_types)
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identifier_re = '[a-zA-Z_][a-zA-Z_0-9\']*'
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# opstart_re = '+\-\*/%=\!><\|&\^'
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tokens = {
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'root': [
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(r'--(.*?)$', Comment.Single),
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(r'\s+', Whitespace),
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(r'\(\)', Punctuation),
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(r'\b(%s)(?!\')\b' % '|'.join(reserved), Keyword.Reserved),
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(r'\b(%s)(?!\')\b' % '|'.join(num_types + other_types), Keyword.Type),
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# Identifiers
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(r'#\[([a-zA-Z_\(\) ]*)\]', Comment.Preproc),
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(r'[#!]?(%s\.)*%s' % (identifier_re, identifier_re), Name),
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(r'\\', Operator),
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(r'[-+/%=!><|&*^][-+/%=!><|&*^.]*', Operator),
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(r'[][(),:;`{}?.\'~^]', Punctuation),
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# Numbers
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(r'0[xX]_*[\da-fA-F](_*[\da-fA-F])*_*[pP][+-]?\d(_*\d)*' + num_postfix,
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Number.Float),
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(r'0[xX]_*[\da-fA-F](_*[\da-fA-F])*\.[\da-fA-F](_*[\da-fA-F])*'
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r'(_*[pP][+-]?\d(_*\d)*)?' + num_postfix, Number.Float),
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(r'\d(_*\d)*_*[eE][+-]?\d(_*\d)*' + num_postfix, Number.Float),
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(r'\d(_*\d)*\.\d(_*\d)*(_*[eE][+-]?\d(_*\d)*)?' + num_postfix, Number.Float),
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(r'0[bB]_*[01](_*[01])*' + num_postfix, Number.Bin),
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(r'0[xX]_*[\da-fA-F](_*[\da-fA-F])*' + num_postfix, Number.Hex),
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(r'\d(_*\d)*' + num_postfix, Number.Integer),
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# Character/String Literals
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(r"'", String.Char, 'character'),
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(r'"', String, 'string'),
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# Special
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(r'\[[a-zA-Z_\d]*\]', Keyword.Type),
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(r'\(\)', Name.Builtin),
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],
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'character': [
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# Allows multi-chars, incorrectly.
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(r"[^\\']'", String.Char, '#pop'),
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(r"\\", String.Escape, 'escape'),
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("'", String.Char, '#pop'),
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],
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'string': [
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(r'[^\\"]+', String),
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(r"\\", String.Escape, 'escape'),
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('"', String, '#pop'),
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],
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'escape': [
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(r'[abfnrtv"\'&\\]', String.Escape, '#pop'),
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(r'\^[][' + uni.Lu + r'@^_]', String.Escape, '#pop'),
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('|'.join(ascii), String.Escape, '#pop'),
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(r'o[0-7]+', String.Escape, '#pop'),
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(r'x[\da-fA-F]+', String.Escape, '#pop'),
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(r'\d+', String.Escape, '#pop'),
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(r'(\s+)(\\)', bygroups(Whitespace, String.Escape), '#pop'),
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],
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}
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