--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/eric6/ThirdParty/Pygments/pygments/lexers/grammar_notation.py Sun Apr 14 15:09:21 2019 +0200
@@ -0,0 +1,213 @@
+# -*- coding: utf-8 -*-
+"""
+ pygments.lexers.grammar_notation
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+ Lexers for grammer notations like BNF.
+
+ :copyright: Copyright 2006-2017 by the Pygments team, see AUTHORS.
+ :license: BSD, see LICENSE for details.
+"""
+
+import re
+
+from pygments.lexer import RegexLexer, bygroups, include, this, using, words
+from pygments.token import Comment, Keyword, Literal, Name, Number, \
+ Operator, Punctuation, String, Text
+
+__all__ = ['BnfLexer', 'AbnfLexer', 'JsgfLexer']
+
+
+class BnfLexer(RegexLexer):
+ """
+ This lexer is for grammer notations which are similar to
+ original BNF.
+
+ In order to maximize a number of targets of this lexer,
+ let's decide some designs:
+
+ * We don't distinguish `Terminal Symbol`.
+
+ * We do assume that `NonTerminal Symbol` are always enclosed
+ with arrow brackets.
+
+ * We do assume that `NonTerminal Symbol` may include
+ any printable characters except arrow brackets and ASCII 0x20.
+ This assumption is for `RBNF <http://www.rfc-base.org/txt/rfc-5511.txt>`_.
+
+ * We do assume that target notation doesn't support comment.
+
+ * We don't distinguish any operators and punctuation except
+ `::=`.
+
+ Though these desision making might cause too minimal highlighting
+ and you might be disappointed, but it is reasonable for us.
+
+ .. versionadded:: 2.1
+ """
+
+ name = 'BNF'
+ aliases = ['bnf']
+ filenames = ['*.bnf']
+ mimetypes = ['text/x-bnf']
+
+ tokens = {
+ 'root': [
+ (r'(<)([ -;=?-~]+)(>)',
+ bygroups(Punctuation, Name.Class, Punctuation)),
+
+ # an only operator
+ (r'::=', Operator),
+
+ # fallback
+ (r'[^<>:]+', Text), # for performance
+ (r'.', Text),
+ ],
+ }
+
+
+class AbnfLexer(RegexLexer):
+ """
+ Lexer for `IETF 7405 ABNF
+ <http://www.ietf.org/rfc/rfc7405.txt>`_
+ (Updates `5234 <http://www.ietf.org/rfc/rfc5234.txt>`_)
+ grammars.
+
+ .. versionadded:: 2.1
+ """
+
+ name = 'ABNF'
+ aliases = ['abnf']
+ filenames = ['*.abnf']
+ mimetypes = ['text/x-abnf']
+
+ _core_rules = (
+ 'ALPHA', 'BIT', 'CHAR', 'CR', 'CRLF', 'CTL', 'DIGIT',
+ 'DQUOTE', 'HEXDIG', 'HTAB', 'LF', 'LWSP', 'OCTET',
+ 'SP', 'VCHAR', 'WSP')
+
+ tokens = {
+ 'root': [
+ # comment
+ (r';.*$', Comment.Single),
+
+ # quoted
+ # double quote itself in this state, it is as '%x22'.
+ (r'(%[si])?"[^"]*"', Literal),
+
+ # binary (but i have never seen...)
+ (r'%b[01]+\-[01]+\b', Literal), # range
+ (r'%b[01]+(\.[01]+)*\b', Literal), # concat
+
+ # decimal
+ (r'%d[0-9]+\-[0-9]+\b', Literal), # range
+ (r'%d[0-9]+(\.[0-9]+)*\b', Literal), # concat
+
+ # hexadecimal
+ (r'%x[0-9a-fA-F]+\-[0-9a-fA-F]+\b', Literal), # range
+ (r'%x[0-9a-fA-F]+(\.[0-9a-fA-F]+)*\b', Literal), # concat
+
+ # repetition (<a>*<b>element) including nRule
+ (r'\b[0-9]+\*[0-9]+', Operator),
+ (r'\b[0-9]+\*', Operator),
+ (r'\b[0-9]+', Operator),
+ (r'\*', Operator),
+
+ # Strictly speaking, these are not keyword but
+ # are called `Core Rule'.
+ (words(_core_rules, suffix=r'\b'), Keyword),
+
+ # nonterminals (ALPHA *(ALPHA / DIGIT / "-"))
+ (r'[a-zA-Z][a-zA-Z0-9-]+\b', Name.Class),
+
+ # operators
+ (r'(=/|=|/)', Operator),
+
+ # punctuation
+ (r'[\[\]()]', Punctuation),
+
+ # fallback
+ (r'\s+', Text),
+ (r'.', Text),
+ ],
+ }
+
+
+class JsgfLexer(RegexLexer):
+ """
+ For `JSpeech Grammar Format <https://www.w3.org/TR/jsgf/>`_
+ grammars.
+
+ .. versionadded:: 2.2
+ """
+ name = 'JSGF'
+ aliases = ['jsgf']
+ filenames = ['*.jsgf']
+ mimetypes = ['application/jsgf', 'application/x-jsgf', 'text/jsgf']
+
+ flags = re.MULTILINE | re.UNICODE
+
+ tokens = {
+ 'root': [
+ include('comments'),
+ include('non-comments'),
+ ],
+ 'comments': [
+ (r'/\*\*(?!/)', Comment.Multiline, 'documentation comment'),
+ (r'/\*[\w\W]*?\*/', Comment.Multiline),
+ (r'//.*', Comment.Single),
+ ],
+ 'non-comments': [
+ (r'\A#JSGF[^;]*', Comment.Preproc),
+ (r'\s+', Text),
+ (r';', Punctuation),
+ (r'[=|()\[\]*+]', Operator),
+ (r'/[^/]+/', Number.Float),
+ (r'"', String.Double, 'string'),
+ (r'\{', String.Other, 'tag'),
+ (words(('import', 'public'), suffix=r'\b'), Keyword.Reserved),
+ (r'grammar\b', Keyword.Reserved, 'grammar name'),
+ (r'(<)(NULL|VOID)(>)',
+ bygroups(Punctuation, Name.Builtin, Punctuation)),
+ (r'<', Punctuation, 'rulename'),
+ (r'\w+|[^\s;=|()\[\]*+/"{<\w]+', Text),
+ ],
+ 'string': [
+ (r'"', String.Double, '#pop'),
+ (r'\\.', String.Escape),
+ (r'[^\\"]+', String.Double),
+ ],
+ 'tag': [
+ (r'\}', String.Other, '#pop'),
+ (r'\\.', String.Escape),
+ (r'[^\\}]+', String.Other),
+ ],
+ 'grammar name': [
+ (r';', Punctuation, '#pop'),
+ (r'\s+', Text),
+ (r'\.', Punctuation),
+ (r'[^;\s.]+', Name.Namespace),
+ ],
+ 'rulename': [
+ (r'>', Punctuation, '#pop'),
+ (r'\*', Punctuation),
+ (r'\s+', Text),
+ (r'([^.>]+)(\s*)(\.)', bygroups(Name.Namespace, Text, Punctuation)),
+ (r'[^.>]+', Name.Constant),
+ ],
+ 'documentation comment': [
+ (r'\*/', Comment.Multiline, '#pop'),
+ (r'(^\s*\*?\s*)(@(?:example|see)\s+)'
+ r'([\w\W]*?(?=(?:^\s*\*?\s*@|\*/)))',
+ bygroups(Comment.Multiline, Comment.Special,
+ using(this, state='example'))),
+ (r'(^\s*\*?\s*)(@\S*)',
+ bygroups(Comment.Multiline, Comment.Special)),
+ (r'[^*\n@]+|\w|\W', Comment.Multiline),
+ ],
+ 'example': [
+ (r'\n\s*\*', Comment.Multiline),
+ include('non-comments'),
+ (r'.', Comment.Multiline),
+ ],
+ }
