173 lines
6.4 KiB
Python
173 lines
6.4 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 2006-2024 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 Text, Comment, Operator, Keyword, Name, String, \
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Number, Punctuation
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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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"""
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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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version_added = '2.11'
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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 = rf"({schar2_re}|-|\$|_)"
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idchar_re = rf"({lcase_re}|{ucase_re}|{digit_re}|{schar_re})"
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idcharstarns_re = rf"({idchar_re}*(\.({lcase_re}|{ucase_re}){idchar_re}*)*)"
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symbchar_re = rf"({lcase_re}|{ucase_re}|{digit_re}|{schar_re}|:)"
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constant_re = rf"({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 = rf"\(({constant_re}|{symbol_re})\)"
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const_sym_re = rf"({constant_re}|{symbol_re}|{escape_re})"
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tokens = {
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'root': [
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include('elpi')
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],
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'elpi': [
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include('_elpi-comment'),
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(r"(:before|:after|:if|:name)(\s*)(\")",
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bygroups(Keyword.Mode, Text.Whitespace, String.Double),
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'elpi-string'),
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(r"(:index)(\s*\()", bygroups(Keyword.Mode, Text.Whitespace),
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'elpi-indexing-expr'),
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(rf"\b(external pred|pred)(\s+)({const_sym_re})",
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bygroups(Keyword.Declaration, Text.Whitespace, Name.Function),
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'elpi-pred-item'),
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(rf"\b(external type|type)(\s+)(({const_sym_re}(,\s*)?)+)",
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bygroups(Keyword.Declaration, Text.Whitespace, Name.Function),
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'elpi-type'),
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(rf"\b(kind)(\s+)(({const_sym_re}|,)+)",
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bygroups(Keyword.Declaration, Text.Whitespace, Name.Function),
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'elpi-type'),
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(rf"\b(typeabbrev)(\s+)({const_sym_re})",
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bygroups(Keyword.Declaration, Text.Whitespace, Name.Function),
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'elpi-type'),
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(r"\b(accumulate)(\s+)(\")",
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bygroups(Keyword.Declaration, Text.Whitespace, String.Double),
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'elpi-string'),
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(rf"\b(accumulate|namespace|local)(\s+)({constant_re})",
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bygroups(Keyword.Declaration, Text.Whitespace, Text)),
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(rf"\b(shorten)(\s+)({constant_re}\.)",
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bygroups(Keyword.Declaration, Text.Whitespace, Text)),
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(r"\b(pi|sigma)(\s+)([a-zA-Z][A-Za-z0-9_ ]*)(\\)",
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bygroups(Keyword.Declaration, Text.Whitespace, Name.Variable, Text)),
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(rf"\b(constraint)(\s+)(({const_sym_re}(\s+)?)+)",
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bygroups(Keyword.Declaration, Text.Whitespace, Name.Function),
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'elpi-chr-rule-start'),
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(rf"(?=[A-Z_]){constant_re}", Name.Variable),
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(rf"(?=[a-z_]){constant_re}\\", Name.Variable),
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(r"_", Name.Variable),
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(rf"({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'\{\{', Punctuation, 'elpi-quote'),
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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-quote': [
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(r'\{\{', Punctuation, '#push'),
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(r'\}\}', Punctuation, '#pop'),
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(rf"(lp:)((?=[A-Z_]){constant_re})", bygroups(Keyword, Name.Variable)),
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(r"[^l\}]+", Text),
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(r"l|\}", Text),
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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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