179 lines
6.2 KiB
Python
179 lines
6.2 KiB
Python
# -*- coding: utf-8 -*-
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"""
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pygments.lexers.clean
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~~~~~~~~~~~~~~~~~~~~~
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Lexer for the Clean language.
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:copyright: Copyright 2006-2020 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 ExtendedRegexLexer, words, default, include, bygroups
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from pygments.token import Comment, Error, Keyword, Literal, Name, Number, \
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Operator, Punctuation, String, Whitespace
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__all__ = ['CleanLexer']
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class CleanLexer(ExtendedRegexLexer):
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"""
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Lexer for the general purpose, state-of-the-art, pure and lazy functional
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programming language Clean (http://clean.cs.ru.nl/Clean).
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.. versionadded: 2.2
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"""
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name = 'Clean'
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aliases = ['clean']
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filenames = ['*.icl', '*.dcl']
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keywords = (
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'case', 'ccall', 'class', 'code', 'code inline', 'derive', 'export',
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'foreign', 'generic', 'if', 'in', 'infix', 'infixl', 'infixr',
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'instance', 'let', 'of', 'otherwise', 'special', 'stdcall', 'where',
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'with')
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modulewords = ('implementation', 'definition', 'system')
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lowerId = r'[a-z`][\w`]*'
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upperId = r'[A-Z`][\w`]*'
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funnyId = r'[~@#$%\^?!+\-*<>\\/|&=:]+'
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scoreUpperId = r'_' + upperId
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scoreLowerId = r'_' + lowerId
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moduleId = r'[a-zA-Z_][a-zA-Z0-9_.`]+'
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classId = '|'.join([lowerId, upperId, funnyId])
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tokens = {
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'root': [
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include('comments'),
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include('keywords'),
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include('module'),
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include('import'),
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include('whitespace'),
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include('literals'),
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include('operators'),
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include('delimiters'),
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include('names'),
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],
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'whitespace': [
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(r'\s+', Whitespace),
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],
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'comments': [
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(r'//.*\n', Comment.Single),
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(r'/\*', Comment.Multi, 'comments.in'),
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(r'/\*\*', Comment.Special, 'comments.in'),
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],
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'comments.in': [
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(r'\*\/', Comment.Multi, '#pop'),
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(r'/\*', Comment.Multi, '#push'),
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(r'[^*/]+', Comment.Multi),
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(r'\*(?!/)', Comment.Multi),
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(r'/', Comment.Multi),
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],
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'keywords': [
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(words(keywords, prefix=r'\b', suffix=r'\b'), Keyword),
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],
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'module': [
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(words(modulewords, prefix=r'\b', suffix=r'\b'), Keyword.Namespace),
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(r'\bmodule\b', Keyword.Namespace, 'module.name'),
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],
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'module.name': [
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include('whitespace'),
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(moduleId, Name.Class, '#pop'),
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],
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'import': [
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(r'\b(import)\b(\s*)', bygroups(Keyword, Whitespace), 'import.module'),
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(r'\b(from)\b(\s*)\b(' + moduleId + r')\b(\s*)\b(import)\b',
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bygroups(Keyword, Whitespace, Name.Class, Whitespace, Keyword),
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'import.what'),
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],
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'import.module': [
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(r'\b(qualified)\b(\s*)', bygroups(Keyword, Whitespace)),
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(r'(\s*)\b(as)\b', bygroups(Whitespace, Keyword), ('#pop', 'import.module.as')),
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(moduleId, Name.Class),
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(r'(\s*)(,)(\s*)', bygroups(Whitespace, Punctuation, Whitespace)),
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(r'\s+', Whitespace),
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default('#pop'),
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],
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'import.module.as': [
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include('whitespace'),
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(lowerId, Name.Class, '#pop'),
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(upperId, Name.Class, '#pop'),
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],
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'import.what': [
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(r'\b(class)\b(\s+)(' + classId + r')',
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bygroups(Keyword, Whitespace, Name.Class), 'import.what.class'),
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(r'\b(instance)(\s+)(' + classId + r')(\s+)',
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bygroups(Keyword, Whitespace, Name.Class, Whitespace), 'import.what.instance'),
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(r'(::)(\s*)\b(' + upperId + r')\b',
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bygroups(Punctuation, Whitespace, Name.Class), 'import.what.type'),
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(r'\b(generic)\b(\s+)\b(' + lowerId + '|' + upperId + r')\b',
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bygroups(Keyword, Whitespace, Name)),
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include('names'),
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(r'(,)(\s+)', bygroups(Punctuation, Whitespace)),
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(r'$', Whitespace, '#pop'),
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include('whitespace'),
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],
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'import.what.class': [
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(r',', Punctuation, '#pop'),
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(r'\(', Punctuation, 'import.what.class.members'),
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(r'$', Whitespace, '#pop:2'),
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include('whitespace'),
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],
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'import.what.class.members': [
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(r',', Punctuation),
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(r'\.\.', Punctuation),
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(r'\)', Punctuation, '#pop'),
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include('names'),
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],
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'import.what.instance': [
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(r'[,)]', Punctuation, '#pop'),
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(r'\(', Punctuation, 'import.what.instance'),
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(r'$', Whitespace, '#pop:2'),
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include('whitespace'),
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include('names'),
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],
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'import.what.type': [
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(r',', Punctuation, '#pop'),
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(r'[({]', Punctuation, 'import.what.type.consesandfields'),
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(r'$', Whitespace, '#pop:2'),
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include('whitespace'),
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],
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'import.what.type.consesandfields': [
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(r',', Punctuation),
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(r'\.\.', Punctuation),
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(r'[)}]', Punctuation, '#pop'),
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include('names'),
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],
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'literals': [
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(r'\'([^\'\\]|\\(x[\da-fA-F]+|\d+|.))\'', Literal.Char),
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(r'[+~-]?0[0-7]+\b', Number.Oct),
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(r'[+~-]?\d+\.\d+(E[+-]?\d+)?', Number.Float),
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(r'[+~-]?\d+\b', Number.Integer),
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(r'[+~-]?0x[\da-fA-F]+\b', Number.Hex),
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(r'True|False', Literal),
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(r'"', String.Double, 'literals.stringd'),
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],
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'literals.stringd': [
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(r'[^\\"\n]+', String.Double),
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(r'"', String.Double, '#pop'),
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(r'\\.', String.Double),
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(r'[$\n]', Error, '#pop'),
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],
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'operators': [
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(r'[-~@#$%\^?!+*<>\\/|&=:.]+', Operator),
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(r'\b_+\b', Operator),
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],
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'delimiters': [
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(r'[,;(){}\[\]]', Punctuation),
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(r'(\')([\w`.]+)(\')',
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bygroups(Punctuation, Name.Class, Punctuation)),
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],
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'names': [
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(lowerId, Name),
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(scoreLowerId, Name),
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(funnyId, Name.Function),
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(upperId, Name.Class),
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(scoreUpperId, Name.Class),
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]
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}
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