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"""
pygments.lexers.slash
~~~~~~~~~~~~~~~~~~~~~
Lexer for the `Slash <https://github.com/arturadib/Slash-A>`_ programming
language.
:copyright: Copyright 2006-2021 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
from pygments.lexer import ExtendedRegexLexer, bygroups, DelegatingLexer
from pygments.token import Name, Number, String, Comment, Punctuation, \
Other, Keyword, Operator, Whitespace
__all__ = ['SlashLexer']
class SlashLanguageLexer(ExtendedRegexLexer):
_nkw = r'(?=[^a-zA-Z_0-9])'
def move_state(new_state):
return ("#pop", new_state)
def right_angle_bracket(lexer, match, ctx):
if len(ctx.stack) > 1 and ctx.stack[-2] == "string":
ctx.stack.pop()
yield match.start(), String.Interpol, '}'
ctx.pos = match.end()
pass
tokens = {
"root": [
(r"<%=", Comment.Preproc, move_state("slash")),
(r"<%!!", Comment.Preproc, move_state("slash")),
(r"<%#.*?%>", Comment.Multiline),
(r"<%", Comment.Preproc, move_state("slash")),
(r".|\n", Other),
],
"string": [
(r"\\", String.Escape, move_state("string_e")),
(r"\"", String, move_state("slash")),
(r"#\{", String.Interpol, "slash"),
(r'.|\n', String),
],
"string_e": [
(r'n', String.Escape, move_state("string")),
(r't', String.Escape, move_state("string")),
(r'r', String.Escape, move_state("string")),
(r'e', String.Escape, move_state("string")),
(r'x[a-fA-F0-9]{2}', String.Escape, move_state("string")),
(r'.', String.Escape, move_state("string")),
],
"regexp": [
(r'}[a-z]*', String.Regex, move_state("slash")),
(r'\\(.|\n)', String.Regex),
(r'{', String.Regex, "regexp_r"),
(r'.|\n', String.Regex),
],
"regexp_r": [
(r'}[a-z]*', String.Regex, "#pop"),
(r'\\(.|\n)', String.Regex),
(r'{', String.Regex, "regexp_r"),
],
"slash": [
(r"%>", Comment.Preproc, move_state("root")),
(r"\"", String, move_state("string")),
(r"'[a-zA-Z0-9_]+", String),
(r'%r{', String.Regex, move_state("regexp")),
(r'/\*.*?\*/', Comment.Multiline),
(r"(#|//).*?\n", Comment.Single),
(r'-?[0-9]+e[+-]?[0-9]+', Number.Float),
(r'-?[0-9]+\.[0-9]+(e[+-]?[0-9]+)?', Number.Float),
(r'-?[0-9]+', Number.Integer),
(r'nil'+_nkw, Name.Builtin),
(r'true'+_nkw, Name.Builtin),
(r'false'+_nkw, Name.Builtin),
(r'self'+_nkw, Name.Builtin),
(r'(class)(\s+)([A-Z][a-zA-Z0-9_\']*)',
bygroups(Keyword, Whitespace, Name.Class)),
(r'class'+_nkw, Keyword),
(r'extends'+_nkw, Keyword),
(r'(def)(\s+)(self)(\s*)(\.)(\s*)([a-z_][a-zA-Z0-9_\']*=?|<<|>>|==|<=>|<=|<|>=|>|\+|-(self)?|~(self)?|\*|/|%|^|&&|&|\||\[\]=?)',
bygroups(Keyword, Whitespace, Name.Builtin, Whitespace, Punctuation, Whitespace, Name.Function)),
(r'(def)(\s+)([a-z_][a-zA-Z0-9_\']*=?|<<|>>|==|<=>|<=|<|>=|>|\+|-(self)?|~(self)?|\*|/|%|^|&&|&|\||\[\]=?)',
bygroups(Keyword, Whitespace, Name.Function)),
(r'def'+_nkw, Keyword),
(r'if'+_nkw, Keyword),
(r'elsif'+_nkw, Keyword),
(r'else'+_nkw, Keyword),
(r'unless'+_nkw, Keyword),
(r'for'+_nkw, Keyword),
(r'in'+_nkw, Keyword),
(r'while'+_nkw, Keyword),
(r'until'+_nkw, Keyword),
(r'and'+_nkw, Keyword),
(r'or'+_nkw, Keyword),
(r'not'+_nkw, Keyword),
(r'lambda'+_nkw, Keyword),
(r'try'+_nkw, Keyword),
(r'catch'+_nkw, Keyword),
(r'return'+_nkw, Keyword),
(r'next'+_nkw, Keyword),
(r'last'+_nkw, Keyword),
(r'throw'+_nkw, Keyword),
(r'use'+_nkw, Keyword),
(r'switch'+_nkw, Keyword),
(r'\\', Keyword),
(r'λ', Keyword),
(r'__FILE__'+_nkw, Name.Builtin.Pseudo),
(r'__LINE__'+_nkw, Name.Builtin.Pseudo),
(r'[A-Z][a-zA-Z0-9_\']*'+_nkw, Name.Constant),
(r'[a-z_][a-zA-Z0-9_\']*'+_nkw, Name),
(r'@[a-z_][a-zA-Z0-9_\']*'+_nkw, Name.Variable.Instance),
(r'@@[a-z_][a-zA-Z0-9_\']*'+_nkw, Name.Variable.Class),
(r'\(', Punctuation),
(r'\)', Punctuation),
(r'\[', Punctuation),
(r'\]', Punctuation),
(r'\{', Punctuation),
(r'\}', right_angle_bracket),
(r';', Punctuation),
(r',', Punctuation),
(r'<<=', Operator),
(r'>>=', Operator),
(r'<<', Operator),
(r'>>', Operator),
(r'==', Operator),
(r'!=', Operator),
(r'=>', Operator),
(r'=', Operator),
(r'<=>', Operator),
(r'<=', Operator),
(r'>=', Operator),
(r'<', Operator),
(r'>', Operator),
(r'\+\+', Operator),
(r'\+=', Operator),
(r'-=', Operator),
(r'\*\*=', Operator),
(r'\*=', Operator),
(r'\*\*', Operator),
(r'\*', Operator),
(r'/=', Operator),
(r'\+', Operator),
(r'-', Operator),
(r'/', Operator),
(r'%=', Operator),
(r'%', Operator),
(r'^=', Operator),
(r'&&=', Operator),
(r'&=', Operator),
(r'&&', Operator),
(r'&', Operator),
(r'\|\|=', Operator),
(r'\|=', Operator),
(r'\|\|', Operator),
(r'\|', Operator),
(r'!', Operator),
(r'\.\.\.', Operator),
(r'\.\.', Operator),
(r'\.', Operator),
(r'::', Operator),
(r':', Operator),
(r'(\s|\n)+', Whitespace),
(r'[a-z_][a-zA-Z0-9_\']*', Name.Variable),
],
}
class SlashLexer(DelegatingLexer):
"""
Lexer for the Slash programming language.
.. versionadded:: 2.4
"""
name = 'Slash'
aliases = ['slash']
filenames = ['*.sla']
def __init__(self, **options):
from pygments.lexers.web import HtmlLexer
super().__init__(HtmlLexer, SlashLanguageLexer, **options)
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