146 lines
5.9 KiB
Python
146 lines
5.9 KiB
Python
"""
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pygments.lexers.elpi
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~~~~~~~~~~~~~~~~~~~~
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Lexer for the `Elpi <http://github.com/LPCIC/elpi>`_ programming 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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from pygments.lexer import RegexLexer, bygroups, include
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from pygments.token import \
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Text, Comment, Operator, Keyword, Name, String, Number
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__all__ = ['ElpiLexer']
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class ElpiLexer(RegexLexer):
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"""
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Lexer for the Elpi programming language.
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.. versionadded::2.11
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"""
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name = 'Elpi'
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url = 'http://github.com/LPCIC/elpi'
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aliases = ['elpi']
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filenames = ['*.elpi']
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mimetypes = ['text/x-elpi']
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lcase_re = r"[a-z]"
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ucase_re = r"[A-Z]"
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digit_re = r"[0-9]"
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schar2_re = r"([+*^?/<>`'@#~=&!])"
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schar_re = r"({}|-|\$|_)".format(schar2_re)
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idchar_re = r"({}|{}|{}|{})".format(lcase_re,ucase_re,digit_re,schar_re)
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idcharstarns_re = r"({}*(\.({}|{}){}*)*)".format(idchar_re, lcase_re, ucase_re, idchar_re)
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symbchar_re = r"({}|{}|{}|{}|:)".format(lcase_re, ucase_re, digit_re, schar_re)
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constant_re = r"({}{}*|{}{}|{}{}*|_{}+)".format(ucase_re, idchar_re, lcase_re, idcharstarns_re,schar2_re, symbchar_re,idchar_re)
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symbol_re=r"(,|<=>|->|:-|;|\?-|->|&|=>|\bas\b|\buvar\b|<|=<|=|==|>=|>|\bi<|\bi=<|\bi>=|\bi>|\bis\b|\br<|\br=<|\br>=|\br>|\bs<|\bs=<|\bs>=|\bs>|@|::|\[\]|`->|`:|`:=|\^|-|\+|\bi-|\bi\+|r-|r\+|/|\*|\bdiv\b|\bi\*|\bmod\b|\br\*|~|\bi~|\br~)"
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escape_re=r"\(({}|{})\)".format(constant_re,symbol_re)
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const_sym_re = r"({}|{}|{})".format(constant_re,symbol_re,escape_re)
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tokens = {
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'root': [ include('elpi') ],
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'elpi': [
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include('_elpi-comment'),
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(r"(:before|:after|:if|:name)(\s*)(\")",bygroups(Keyword.Mode,Text.Whitespace,String.Double),'elpi-string'),
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(r"(:index)(\s*\()",bygroups(Keyword.Mode,Text.Whitespace),'elpi-indexing-expr'),
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(r"\b(external pred|pred)(\s+)({})".format(const_sym_re),bygroups(Keyword.Declaration,Text.Whitespace,Name.Function),'elpi-pred-item'),
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(r"\b(external type|type)(\s+)(({}(,\s*)?)+)".format(const_sym_re),bygroups(Keyword.Declaration,Text.Whitespace,Name.Function),'elpi-type'),
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(r"\b(kind)(\s+)(({}|,)+)".format(const_sym_re),bygroups(Keyword.Declaration,Text.Whitespace,Name.Function),'elpi-type'),
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(r"\b(typeabbrev)(\s+)({})".format(const_sym_re),bygroups(Keyword.Declaration,Text.Whitespace,Name.Function),'elpi-type'),
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(r"\b(accumulate)(\s+)(\")",bygroups(Keyword.Declaration,Text.Whitespace,String.Double),'elpi-string'),
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(r"\b(accumulate|namespace|local)(\s+)({})".format(constant_re),bygroups(Keyword.Declaration,Text.Whitespace,Text)),
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(r"\b(shorten)(\s+)({}\.)".format(constant_re),bygroups(Keyword.Declaration,Text.Whitespace,Text)),
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(r"\b(pi|sigma)(\s+)([a-zA-Z][A-Za-z0-9_ ]*)(\\)",bygroups(Keyword.Declaration,Text.Whitespace,Name.Variable,Text)),
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(r"\b(constraint)(\s+)(({}(\s+)?)+)".format(const_sym_re),bygroups(Keyword.Declaration,Text.Whitespace,Name.Function),'elpi-chr-rule-start'),
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(r"(?=[A-Z_]){}".format(constant_re),Name.Variable),
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(r"(?=[a-z_]){}\\".format(constant_re),Name.Variable),
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(r"_",Name.Variable),
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(r"({}|!|=>|;)".format(symbol_re),Keyword.Declaration),
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(constant_re,Text),
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(r"\[|\]|\||=>",Keyword.Declaration),
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(r'"', String.Double, 'elpi-string'),
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(r'`', String.Double, 'elpi-btick'),
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(r'\'', String.Double, 'elpi-tick'),
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(r'\{[^\{]', Text, 'elpi-spill'),
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(r"\(",Text,'elpi-in-parens'),
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(r'\d[\d_]*', Number.Integer),
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(r'-?\d[\d_]*(.[\d_]*)?([eE][+\-]?\d[\d_]*)', Number.Float),
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(r"[\+\*\-/\^\.]", Operator),
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],
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'_elpi-comment': [
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(r'%[^\n]*\n',Comment),
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(r'/\*',Comment,'elpi-multiline-comment'),
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(r"\s+",Text.Whitespace),
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],
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'elpi-multiline-comment': [
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(r'\*/',Comment,'#pop'),
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(r'.',Comment)
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],
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'elpi-indexing-expr':[
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(r'[0-9 _]+',Number.Integer),
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(r'\)',Text,'#pop'),
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],
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'elpi-type': [
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(r"(ctype\s+)(\")",bygroups(Keyword.Type,String.Double),'elpi-string'),
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(r'->',Keyword.Type),
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(constant_re,Keyword.Type),
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(r"\(|\)",Keyword.Type),
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(r"\.",Text,'#pop'),
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include('_elpi-comment'),
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],
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'elpi-chr-rule-start': [
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(r"\{",Text,'elpi-chr-rule'),
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include('_elpi-comment'),
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],
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'elpi-chr-rule': [
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(r"\brule\b",Keyword.Declaration),
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(r"\\",Keyword.Declaration),
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(r"\}",Text,'#pop:2'),
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include('elpi'),
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],
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'elpi-pred-item': [
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(r"[io]:",Keyword.Mode,'elpi-ctype'),
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(r"\.",Text,'#pop'),
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include('_elpi-comment'),
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],
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'elpi-ctype': [
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(r"(ctype\s+)(\")",bygroups(Keyword.Type,String.Double),'elpi-string'),
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(r'->',Keyword.Type),
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(constant_re,Keyword.Type),
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(r"\(|\)",Keyword.Type),
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(r",",Text,'#pop'),
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(r"\.",Text,'#pop:2'),
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include('_elpi-comment'),
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],
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'elpi-btick': [
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(r'[^` ]+', String.Double),
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(r'`', String.Double, '#pop'),
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],
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'elpi-tick': [
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(r'[^\' ]+', String.Double),
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(r'\'', String.Double, '#pop'),
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],
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'elpi-string': [
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(r'[^\"]+', String.Double),
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(r'"', String.Double, '#pop'),
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],
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'elpi-spill': [
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(r'\{[^\{]', Text, '#push'),
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(r'\}[^\}]', Text, '#pop'),
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include('elpi'),
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],
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'elpi-in-parens': [
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(r"\(", Operator, '#push'),
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(r"\)", Operator, '#pop'),
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include('elpi'),
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],
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}
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