Uploaded Test files

venv/Lib/site-packages/pygments/lexers/parsers.py

@@ -0,0 +1,800 @@
+# -*- coding: utf-8 -*-
+"""
+    pygments.lexers.parsers
+    ~~~~~~~~~~~~~~~~~~~~~~~
+
+    Lexers for parser generators.
+
+    :copyright: Copyright 2006-2020 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import re
+
+from pygments.lexer import RegexLexer, DelegatingLexer, \
+    include, bygroups, using
+from pygments.token import Punctuation, Other, Text, Comment, Operator, \
+    Keyword, Name, String, Number, Whitespace
+from pygments.lexers.jvm import JavaLexer
+from pygments.lexers.c_cpp import CLexer, CppLexer
+from pygments.lexers.objective import ObjectiveCLexer
+from pygments.lexers.d import DLexer
+from pygments.lexers.dotnet import CSharpLexer
+from pygments.lexers.ruby import RubyLexer
+from pygments.lexers.python import PythonLexer
+from pygments.lexers.perl import PerlLexer
+
+__all__ = ['RagelLexer', 'RagelEmbeddedLexer', 'RagelCLexer', 'RagelDLexer',
+           'RagelCppLexer', 'RagelObjectiveCLexer', 'RagelRubyLexer',
+           'RagelJavaLexer', 'AntlrLexer', 'AntlrPythonLexer',
+           'AntlrPerlLexer', 'AntlrRubyLexer', 'AntlrCppLexer',
+           'AntlrCSharpLexer', 'AntlrObjectiveCLexer',
+           'AntlrJavaLexer', 'AntlrActionScriptLexer',
+           'TreetopLexer', 'EbnfLexer']
+
+
+class RagelLexer(RegexLexer):
+    """
+    A pure `Ragel <http://www.complang.org/ragel/>`_ lexer.  Use this for
+    fragments of Ragel.  For ``.rl`` files, use RagelEmbeddedLexer instead
+    (or one of the language-specific subclasses).
+
+    .. versionadded:: 1.1
+    """
+
+    name = 'Ragel'
+    aliases = ['ragel']
+    filenames = []
+
+    tokens = {
+        'whitespace': [
+            (r'\s+', Whitespace)
+        ],
+        'comments': [
+            (r'\#.*$', Comment),
+        ],
+        'keywords': [
+            (r'(access|action|alphtype)\b', Keyword),
+            (r'(getkey|write|machine|include)\b', Keyword),
+            (r'(any|ascii|extend|alpha|digit|alnum|lower|upper)\b', Keyword),
+            (r'(xdigit|cntrl|graph|print|punct|space|zlen|empty)\b', Keyword)
+        ],
+        'numbers': [
+            (r'0x[0-9A-Fa-f]+', Number.Hex),
+            (r'[+-]?[0-9]+', Number.Integer),
+        ],
+        'literals': [
+            (r'"(\\\\|\\"|[^"])*"', String),              # double quote string
+            (r"'(\\\\|\\'|[^'])*'", String),              # single quote string
+            (r'\[(\\\\|\\\]|[^\]])*\]', String),          # square bracket literals
+            (r'/(?!\*)(\\\\|\\/|[^/])*/', String.Regex),  # regular expressions
+        ],
+        'identifiers': [
+            (r'[a-zA-Z_]\w*', Name.Variable),
+        ],
+        'operators': [
+            (r',', Operator),                           # Join
+            (r'\||&|--?', Operator),                    # Union, Intersection and Subtraction
+            (r'\.|<:|:>>?', Operator),                  # Concatention
+            (r':', Operator),                           # Label
+            (r'->', Operator),                          # Epsilon Transition
+            (r'(>|\$|%|<|@|<>)(/|eof\b)', Operator),    # EOF Actions
+            (r'(>|\$|%|<|@|<>)(!|err\b)', Operator),    # Global Error Actions
+            (r'(>|\$|%|<|@|<>)(\^|lerr\b)', Operator),  # Local Error Actions
+            (r'(>|\$|%|<|@|<>)(~|to\b)', Operator),     # To-State Actions
+            (r'(>|\$|%|<|@|<>)(\*|from\b)', Operator),  # From-State Actions
+            (r'>|@|\$|%', Operator),                    # Transition Actions and Priorities
+            (r'\*|\?|\+|\{[0-9]*,[0-9]*\}', Operator),  # Repetition
+            (r'!|\^', Operator),                        # Negation
+            (r'\(|\)', Operator),                       # Grouping
+        ],
+        'root': [
+            include('literals'),
+            include('whitespace'),
+            include('comments'),
+            include('keywords'),
+            include('numbers'),
+            include('identifiers'),
+            include('operators'),
+            (r'\{', Punctuation, 'host'),
+            (r'=', Operator),
+            (r';', Punctuation),
+        ],
+        'host': [
+            (r'(' + r'|'.join((  # keep host code in largest possible chunks
+                r'[^{}\'"/#]+',  # exclude unsafe characters
+                r'[^\\]\\[{}]',  # allow escaped { or }
+
+                # strings and comments may safely contain unsafe characters
+                r'"(\\\\|\\"|[^"])*"',  # double quote string
+                r"'(\\\\|\\'|[^'])*'",  # single quote string
+                r'//.*$\n?',            # single line comment
+                r'/\*(.|\n)*?\*/',      # multi-line javadoc-style comment
+                r'\#.*$\n?',            # ruby comment
+
+                # regular expression: There's no reason for it to start
+                # with a * and this stops confusion with comments.
+                r'/(?!\*)(\\\\|\\/|[^/])*/',
+
+                # / is safe now that we've handled regex and javadoc comments
+                r'/',
+            )) + r')+', Other),
+
+            (r'\{', Punctuation, '#push'),
+            (r'\}', Punctuation, '#pop'),
+        ],
+    }
+
+
+class RagelEmbeddedLexer(RegexLexer):
+    """
+    A lexer for `Ragel`_ embedded in a host language file.
+
+    This will only highlight Ragel statements. If you want host language
+    highlighting then call the language-specific Ragel lexer.
+
+    .. versionadded:: 1.1
+    """
+
+    name = 'Embedded Ragel'
+    aliases = ['ragel-em']
+    filenames = ['*.rl']
+
+    tokens = {
+        'root': [
+            (r'(' + r'|'.join((   # keep host code in largest possible chunks
+                r'[^%\'"/#]+',    # exclude unsafe characters
+                r'%(?=[^%]|$)',   # a single % sign is okay, just not 2 of them
+
+                # strings and comments may safely contain unsafe characters
+                r'"(\\\\|\\"|[^"])*"',  # double quote string
+                r"'(\\\\|\\'|[^'])*'",  # single quote string
+                r'/\*(.|\n)*?\*/',      # multi-line javadoc-style comment
+                r'//.*$\n?',  # single line comment
+                r'\#.*$\n?',  # ruby/ragel comment
+                r'/(?!\*)(\\\\|\\/|[^/])*/',  # regular expression
+
+                # / is safe now that we've handled regex and javadoc comments
+                r'/',
+            )) + r')+', Other),
+
+            # Single Line FSM.
+            # Please don't put a quoted newline in a single line FSM.
+            # That's just mean. It will break this.
+            (r'(%%)(?![{%])(.*)($|;)(\n?)', bygroups(Punctuation,
+                                                     using(RagelLexer),
+                                                     Punctuation, Text)),
+
+            # Multi Line FSM.
+            (r'(%%%%|%%)\{', Punctuation, 'multi-line-fsm'),
+        ],
+        'multi-line-fsm': [
+            (r'(' + r'|'.join((  # keep ragel code in largest possible chunks.
+                r'(' + r'|'.join((
+                    r'[^}\'"\[/#]',   # exclude unsafe characters
+                    r'\}(?=[^%]|$)',   # } is okay as long as it's not followed by %
+                    r'\}%(?=[^%]|$)',  # ...well, one %'s okay, just not two...
+                    r'[^\\]\\[{}]',   # ...and } is okay if it's escaped
+
+                    # allow / if it's preceded with one of these symbols
+                    # (ragel EOF actions)
+                    r'(>|\$|%|<|@|<>)/',
+
+                    # specifically allow regex followed immediately by *
+                    # so it doesn't get mistaken for a comment
+                    r'/(?!\*)(\\\\|\\/|[^/])*/\*',
+
+                    # allow / as long as it's not followed by another / or by a *
+                    r'/(?=[^/*]|$)',
+
+                    # We want to match as many of these as we can in one block.
+                    # Not sure if we need the + sign here,
+                    # does it help performance?
+                )) + r')+',
+
+                # strings and comments may safely contain unsafe characters
+                r'"(\\\\|\\"|[^"])*"',      # double quote string
+                r"'(\\\\|\\'|[^'])*'",      # single quote string
+                r"\[(\\\\|\\\]|[^\]])*\]",  # square bracket literal
+                r'/\*(.|\n)*?\*/',          # multi-line javadoc-style comment
+                r'//.*$\n?',                # single line comment
+                r'\#.*$\n?',                # ruby/ragel comment
+            )) + r')+', using(RagelLexer)),
+
+            (r'\}%%', Punctuation, '#pop'),
+        ]
+    }
+
+    def analyse_text(text):
+        return '@LANG: indep' in text
+
+
+class RagelRubyLexer(DelegatingLexer):
+    """
+    A lexer for `Ragel`_ in a Ruby host file.
+
+    .. versionadded:: 1.1
+    """
+
+    name = 'Ragel in Ruby Host'
+    aliases = ['ragel-ruby', 'ragel-rb']
+    filenames = ['*.rl']
+
+    def __init__(self, **options):
+        super().__init__(RubyLexer, RagelEmbeddedLexer, **options)
+
+    def analyse_text(text):
+        return '@LANG: ruby' in text
+
+
+class RagelCLexer(DelegatingLexer):
+    """
+    A lexer for `Ragel`_ in a C host file.
+
+    .. versionadded:: 1.1
+    """
+
+    name = 'Ragel in C Host'
+    aliases = ['ragel-c']
+    filenames = ['*.rl']
+
+    def __init__(self, **options):
+        super().__init__(CLexer, RagelEmbeddedLexer, **options)
+
+    def analyse_text(text):
+        return '@LANG: c' in text
+
+
+class RagelDLexer(DelegatingLexer):
+    """
+    A lexer for `Ragel`_ in a D host file.
+
+    .. versionadded:: 1.1
+    """
+
+    name = 'Ragel in D Host'
+    aliases = ['ragel-d']
+    filenames = ['*.rl']
+
+    def __init__(self, **options):
+        super().__init__(DLexer, RagelEmbeddedLexer, **options)
+
+    def analyse_text(text):
+        return '@LANG: d' in text
+
+
+class RagelCppLexer(DelegatingLexer):
+    """
+    A lexer for `Ragel`_ in a CPP host file.
+
+    .. versionadded:: 1.1
+    """
+
+    name = 'Ragel in CPP Host'
+    aliases = ['ragel-cpp']
+    filenames = ['*.rl']
+
+    def __init__(self, **options):
+        super().__init__(CppLexer, RagelEmbeddedLexer, **options)
+
+    def analyse_text(text):
+        return '@LANG: c++' in text
+
+
+class RagelObjectiveCLexer(DelegatingLexer):
+    """
+    A lexer for `Ragel`_ in an Objective C host file.
+
+    .. versionadded:: 1.1
+    """
+
+    name = 'Ragel in Objective C Host'
+    aliases = ['ragel-objc']
+    filenames = ['*.rl']
+
+    def __init__(self, **options):
+        super().__init__(ObjectiveCLexer, RagelEmbeddedLexer, **options)
+
+    def analyse_text(text):
+        return '@LANG: objc' in text
+
+
+class RagelJavaLexer(DelegatingLexer):
+    """
+    A lexer for `Ragel`_ in a Java host file.
+
+    .. versionadded:: 1.1
+    """
+
+    name = 'Ragel in Java Host'
+    aliases = ['ragel-java']
+    filenames = ['*.rl']
+
+    def __init__(self, **options):
+        super().__init__(JavaLexer, RagelEmbeddedLexer, **options)
+
+    def analyse_text(text):
+        return '@LANG: java' in text
+
+
+class AntlrLexer(RegexLexer):
+    """
+    Generic `ANTLR`_ Lexer.
+    Should not be called directly, instead
+    use DelegatingLexer for your target language.
+
+    .. versionadded:: 1.1
+
+    .. _ANTLR: http://www.antlr.org/
+    """
+
+    name = 'ANTLR'
+    aliases = ['antlr']
+    filenames = []
+
+    _id = r'[A-Za-z]\w*'
+    _TOKEN_REF = r'[A-Z]\w*'
+    _RULE_REF = r'[a-z]\w*'
+    _STRING_LITERAL = r'\'(?:\\\\|\\\'|[^\']*)\''
+    _INT = r'[0-9]+'
+
+    tokens = {
+        'whitespace': [
+            (r'\s+', Whitespace),
+        ],
+        'comments': [
+            (r'//.*$', Comment),
+            (r'/\*(.|\n)*?\*/', Comment),
+        ],
+        'root': [
+            include('whitespace'),
+            include('comments'),
+
+            (r'(lexer|parser|tree)?(\s*)(grammar\b)(\s*)(' + _id + ')(;)',
+             bygroups(Keyword, Whitespace, Keyword, Whitespace, Name.Class,
+                      Punctuation)),
+            # optionsSpec
+            (r'options\b', Keyword, 'options'),
+            # tokensSpec
+            (r'tokens\b', Keyword, 'tokens'),
+            # attrScope
+            (r'(scope)(\s*)(' + _id + r')(\s*)(\{)',
+             bygroups(Keyword, Whitespace, Name.Variable, Whitespace,
+                      Punctuation), 'action'),
+            # exception
+            (r'(catch|finally)\b', Keyword, 'exception'),
+            # action
+            (r'(@' + _id + r')(\s*)(::)?(\s*)(' + _id + r')(\s*)(\{)',
+             bygroups(Name.Label, Whitespace, Punctuation, Whitespace,
+                      Name.Label, Whitespace, Punctuation), 'action'),
+            # rule
+            (r'((?:protected|private|public|fragment)\b)?(\s*)(' + _id + ')(!)?',
+             bygroups(Keyword, Whitespace, Name.Label, Punctuation),
+             ('rule-alts', 'rule-prelims')),
+        ],
+        'exception': [
+            (r'\n', Whitespace, '#pop'),
+            (r'\s', Whitespace),
+            include('comments'),
+
+            (r'\[', Punctuation, 'nested-arg-action'),
+            (r'\{', Punctuation, 'action'),
+        ],
+        'rule-prelims': [
+            include('whitespace'),
+            include('comments'),
+
+            (r'returns\b', Keyword),
+            (r'\[', Punctuation, 'nested-arg-action'),
+            (r'\{', Punctuation, 'action'),
+            # throwsSpec
+            (r'(throws)(\s+)(' + _id + ')',
+             bygroups(Keyword, Whitespace, Name.Label)),
+            (r'(,)(\s*)(' + _id + ')',
+             bygroups(Punctuation, Whitespace, Name.Label)),  # Additional throws
+            # optionsSpec
+            (r'options\b', Keyword, 'options'),
+            # ruleScopeSpec - scope followed by target language code or name of action
+            # TODO finish implementing other possibilities for scope
+            # L173 ANTLRv3.g from ANTLR book
+            (r'(scope)(\s+)(\{)', bygroups(Keyword, Whitespace, Punctuation),
+             'action'),
+            (r'(scope)(\s+)(' + _id + r')(\s*)(;)',
+             bygroups(Keyword, Whitespace, Name.Label, Whitespace, Punctuation)),
+            # ruleAction
+            (r'(@' + _id + r')(\s*)(\{)',
+             bygroups(Name.Label, Whitespace, Punctuation), 'action'),
+            # finished prelims, go to rule alts!
+            (r':', Punctuation, '#pop')
+        ],
+        'rule-alts': [
+            include('whitespace'),
+            include('comments'),
+
+            # These might need to go in a separate 'block' state triggered by (
+            (r'options\b', Keyword, 'options'),
+            (r':', Punctuation),
+
+            # literals
+            (r"'(\\\\|\\'|[^'])*'", String),
+            (r'"(\\\\|\\"|[^"])*"', String),
+            (r'<<([^>]|>[^>])>>', String),
+            # identifiers
+            # Tokens start with capital letter.
+            (r'\$?[A-Z_]\w*', Name.Constant),
+            # Rules start with small letter.
+            (r'\$?[a-z_]\w*', Name.Variable),
+            # operators
+            (r'(\+|\||->|=>|=|\(|\)|\.\.|\.|\?|\*|\^|!|\#|~)', Operator),
+            (r',', Punctuation),
+            (r'\[', Punctuation, 'nested-arg-action'),
+            (r'\{', Punctuation, 'action'),
+            (r';', Punctuation, '#pop')
+        ],
+        'tokens': [
+            include('whitespace'),
+            include('comments'),
+            (r'\{', Punctuation),
+            (r'(' + _TOKEN_REF + r')(\s*)(=)?(\s*)(' + _STRING_LITERAL
+             + r')?(\s*)(;)',
+             bygroups(Name.Label, Whitespace, Punctuation, Whitespace,
+                      String, Whitespace, Punctuation)),
+            (r'\}', Punctuation, '#pop'),
+        ],
+        'options': [
+            include('whitespace'),
+            include('comments'),
+            (r'\{', Punctuation),
+            (r'(' + _id + r')(\s*)(=)(\s*)(' +
+             '|'.join((_id, _STRING_LITERAL, _INT, r'\*')) + r')(\s*)(;)',
+             bygroups(Name.Variable, Whitespace, Punctuation, Whitespace,
+                      Text, Whitespace, Punctuation)),
+            (r'\}', Punctuation, '#pop'),
+        ],
+        'action': [
+            (r'(' + r'|'.join((    # keep host code in largest possible chunks
+                r'[^${}\'"/\\]+',  # exclude unsafe characters
+
+                # strings and comments may safely contain unsafe characters
+                r'"(\\\\|\\"|[^"])*"',  # double quote string
+                r"'(\\\\|\\'|[^'])*'",  # single quote string
+                r'//.*$\n?',            # single line comment
+                r'/\*(.|\n)*?\*/',      # multi-line javadoc-style comment
+
+                # regular expression: There's no reason for it to start
+                # with a * and this stops confusion with comments.
+                r'/(?!\*)(\\\\|\\/|[^/])*/',
+
+                # backslashes are okay, as long as we are not backslashing a %
+                r'\\(?!%)',
+
+                # Now that we've handled regex and javadoc comments
+                # it's safe to let / through.
+                r'/',
+            )) + r')+', Other),
+            (r'(\\)(%)', bygroups(Punctuation, Other)),
+            (r'(\$[a-zA-Z]+)(\.?)(text|value)?',
+             bygroups(Name.Variable, Punctuation, Name.Property)),
+            (r'\{', Punctuation, '#push'),
+            (r'\}', Punctuation, '#pop'),
+        ],
+        'nested-arg-action': [
+            (r'(' + r'|'.join((    # keep host code in largest possible chunks.
+                r'[^$\[\]\'"/]+',  # exclude unsafe characters
+
+                # strings and comments may safely contain unsafe characters
+                r'"(\\\\|\\"|[^"])*"',  # double quote string
+                r"'(\\\\|\\'|[^'])*'",  # single quote string
+                r'//.*$\n?',            # single line comment
+                r'/\*(.|\n)*?\*/',      # multi-line javadoc-style comment
+
+                # regular expression: There's no reason for it to start
+                # with a * and this stops confusion with comments.
+                r'/(?!\*)(\\\\|\\/|[^/])*/',
+
+                # Now that we've handled regex and javadoc comments
+                # it's safe to let / through.
+                r'/',
+            )) + r')+', Other),
+
+
+            (r'\[', Punctuation, '#push'),
+            (r'\]', Punctuation, '#pop'),
+            (r'(\$[a-zA-Z]+)(\.?)(text|value)?',
+             bygroups(Name.Variable, Punctuation, Name.Property)),
+            (r'(\\\\|\\\]|\\\[|[^\[\]])+', Other),
+        ]
+    }
+
+    def analyse_text(text):
+        return re.search(r'^\s*grammar\s+[a-zA-Z0-9]+\s*;', text, re.M)
+
+
+# http://www.antlr.org/wiki/display/ANTLR3/Code+Generation+Targets
+
+class AntlrCppLexer(DelegatingLexer):
+    """
+    `ANTLR`_ with CPP Target
+
+    .. versionadded:: 1.1
+    """
+
+    name = 'ANTLR With CPP Target'
+    aliases = ['antlr-cpp']
+    filenames = ['*.G', '*.g']
+
+    def __init__(self, **options):
+        super().__init__(CppLexer, AntlrLexer, **options)
+
+    def analyse_text(text):
+        return AntlrLexer.analyse_text(text) and \
+            re.search(r'^\s*language\s*=\s*C\s*;', text, re.M)
+
+
+class AntlrObjectiveCLexer(DelegatingLexer):
+    """
+    `ANTLR`_ with Objective-C Target
+
+    .. versionadded:: 1.1
+    """
+
+    name = 'ANTLR With ObjectiveC Target'
+    aliases = ['antlr-objc']
+    filenames = ['*.G', '*.g']
+
+    def __init__(self, **options):
+        super().__init__(ObjectiveCLexer, AntlrLexer, **options)
+
+    def analyse_text(text):
+        return AntlrLexer.analyse_text(text) and \
+            re.search(r'^\s*language\s*=\s*ObjC\s*;', text)
+
+
+class AntlrCSharpLexer(DelegatingLexer):
+    """
+    `ANTLR`_ with C# Target
+
+    .. versionadded:: 1.1
+    """
+
+    name = 'ANTLR With C# Target'
+    aliases = ['antlr-csharp', 'antlr-c#']
+    filenames = ['*.G', '*.g']
+
+    def __init__(self, **options):
+        super().__init__(CSharpLexer, AntlrLexer, **options)
+
+    def analyse_text(text):
+        return AntlrLexer.analyse_text(text) and \
+            re.search(r'^\s*language\s*=\s*CSharp2\s*;', text, re.M)
+
+
+class AntlrPythonLexer(DelegatingLexer):
+    """
+    `ANTLR`_ with Python Target
+
+    .. versionadded:: 1.1
+    """
+
+    name = 'ANTLR With Python Target'
+    aliases = ['antlr-python']
+    filenames = ['*.G', '*.g']
+
+    def __init__(self, **options):
+        super().__init__(PythonLexer, AntlrLexer, **options)
+
+    def analyse_text(text):
+        return AntlrLexer.analyse_text(text) and \
+            re.search(r'^\s*language\s*=\s*Python\s*;', text, re.M)
+
+
+class AntlrJavaLexer(DelegatingLexer):
+    """
+    `ANTLR`_ with Java Target
+
+    .. versionadded:: 1.
+    """
+
+    name = 'ANTLR With Java Target'
+    aliases = ['antlr-java']
+    filenames = ['*.G', '*.g']
+
+    def __init__(self, **options):
+        super().__init__(JavaLexer, AntlrLexer, **options)
+
+    def analyse_text(text):
+        # Antlr language is Java by default
+        return AntlrLexer.analyse_text(text) and 0.9
+
+
+class AntlrRubyLexer(DelegatingLexer):
+    """
+    `ANTLR`_ with Ruby Target
+
+    .. versionadded:: 1.1
+    """
+
+    name = 'ANTLR With Ruby Target'
+    aliases = ['antlr-ruby', 'antlr-rb']
+    filenames = ['*.G', '*.g']
+
+    def __init__(self, **options):
+        super().__init__(RubyLexer, AntlrLexer, **options)
+
+    def analyse_text(text):
+        return AntlrLexer.analyse_text(text) and \
+            re.search(r'^\s*language\s*=\s*Ruby\s*;', text, re.M)
+
+
+class AntlrPerlLexer(DelegatingLexer):
+    """
+    `ANTLR`_ with Perl Target
+
+    .. versionadded:: 1.1
+    """
+
+    name = 'ANTLR With Perl Target'
+    aliases = ['antlr-perl']
+    filenames = ['*.G', '*.g']
+
+    def __init__(self, **options):
+        super().__init__(PerlLexer, AntlrLexer, **options)
+
+    def analyse_text(text):
+        return AntlrLexer.analyse_text(text) and \
+            re.search(r'^\s*language\s*=\s*Perl5\s*;', text, re.M)
+
+
+class AntlrActionScriptLexer(DelegatingLexer):
+    """
+    `ANTLR`_ with ActionScript Target
+
+    .. versionadded:: 1.1
+    """
+
+    name = 'ANTLR With ActionScript Target'
+    aliases = ['antlr-as', 'antlr-actionscript']
+    filenames = ['*.G', '*.g']
+
+    def __init__(self, **options):
+        from pygments.lexers.actionscript import ActionScriptLexer
+        super().__init__(ActionScriptLexer, AntlrLexer, **options)
+
+    def analyse_text(text):
+        return AntlrLexer.analyse_text(text) and \
+            re.search(r'^\s*language\s*=\s*ActionScript\s*;', text, re.M)
+
+
+class TreetopBaseLexer(RegexLexer):
+    """
+    A base lexer for `Treetop <http://treetop.rubyforge.org/>`_ grammars.
+    Not for direct use; use TreetopLexer instead.
+
+    .. versionadded:: 1.6
+    """
+
+    tokens = {
+        'root': [
+            include('space'),
+            (r'require[ \t]+[^\n\r]+[\n\r]', Other),
+            (r'module\b', Keyword.Namespace, 'module'),
+            (r'grammar\b', Keyword, 'grammar'),
+        ],
+        'module': [
+            include('space'),
+            include('end'),
+            (r'module\b', Keyword, '#push'),
+            (r'grammar\b', Keyword, 'grammar'),
+            (r'[A-Z]\w*(?:::[A-Z]\w*)*', Name.Namespace),
+        ],
+        'grammar': [
+            include('space'),
+            include('end'),
+            (r'rule\b', Keyword, 'rule'),
+            (r'include\b', Keyword, 'include'),
+            (r'[A-Z]\w*', Name),
+        ],
+        'include': [
+            include('space'),
+            (r'[A-Z]\w*(?:::[A-Z]\w*)*', Name.Class, '#pop'),
+        ],
+        'rule': [
+            include('space'),
+            include('end'),
+            (r'"(\\\\|\\"|[^"])*"', String.Double),
+            (r"'(\\\\|\\'|[^'])*'", String.Single),
+            (r'([A-Za-z_]\w*)(:)', bygroups(Name.Label, Punctuation)),
+            (r'[A-Za-z_]\w*', Name),
+            (r'[()]', Punctuation),
+            (r'[?+*/&!~]', Operator),
+            (r'\[(?:\\.|\[:\^?[a-z]+:\]|[^\\\]])+\]', String.Regex),
+            (r'([0-9]*)(\.\.)([0-9]*)',
+             bygroups(Number.Integer, Operator, Number.Integer)),
+            (r'(<)([^>]+)(>)', bygroups(Punctuation, Name.Class, Punctuation)),
+            (r'\{', Punctuation, 'inline_module'),
+            (r'\.', String.Regex),
+        ],
+        'inline_module': [
+            (r'\{', Other, 'ruby'),
+            (r'\}', Punctuation, '#pop'),
+            (r'[^{}]+', Other),
+        ],
+        'ruby': [
+            (r'\{', Other, '#push'),
+            (r'\}', Other, '#pop'),
+            (r'[^{}]+', Other),
+        ],
+        'space': [
+            (r'[ \t\n\r]+', Whitespace),
+            (r'#[^\n]*', Comment.Single),
+        ],
+        'end': [
+            (r'end\b', Keyword, '#pop'),
+        ],
+    }
+
+
+class TreetopLexer(DelegatingLexer):
+    """
+    A lexer for `Treetop <http://treetop.rubyforge.org/>`_ grammars.
+
+    .. versionadded:: 1.6
+    """
+
+    name = 'Treetop'
+    aliases = ['treetop']
+    filenames = ['*.treetop', '*.tt']
+
+    def __init__(self, **options):
+        super().__init__(RubyLexer, TreetopBaseLexer, **options)
+
+
+class EbnfLexer(RegexLexer):
+    """
+    Lexer for `ISO/IEC 14977 EBNF
+    <http://en.wikipedia.org/wiki/Extended_Backus%E2%80%93Naur_Form>`_
+    grammars.
+
+    .. versionadded:: 2.0
+    """
+
+    name = 'EBNF'
+    aliases = ['ebnf']
+    filenames = ['*.ebnf']
+    mimetypes = ['text/x-ebnf']
+
+    tokens = {
+        'root': [
+            include('whitespace'),
+            include('comment_start'),
+            include('identifier'),
+            (r'=', Operator, 'production'),
+        ],
+        'production': [
+            include('whitespace'),
+            include('comment_start'),
+            include('identifier'),
+            (r'"[^"]*"', String.Double),
+            (r"'[^']*'", String.Single),
+            (r'(\?[^?]*\?)', Name.Entity),
+            (r'[\[\]{}(),|]', Punctuation),
+            (r'-', Operator),
+            (r';', Punctuation, '#pop'),
+            (r'\.', Punctuation, '#pop'),
+        ],
+        'whitespace': [
+            (r'\s+', Text),
+        ],
+        'comment_start': [
+            (r'\(\*', Comment.Multiline, 'comment'),
+        ],
+        'comment': [
+            (r'[^*)]', Comment.Multiline),
+            include('comment_start'),
+            (r'\*\)', Comment.Multiline, '#pop'),
+            (r'[*)]', Comment.Multiline),
+        ],
+        'identifier': [
+            (r'([a-zA-Z][\w \-]*)', Keyword),
+        ],
+    }