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"""
pygments.lexers.parsers
~~~~~~~~~~~~~~~~~~~~~~~
Lexers for parser generators.
:copyright: Copyright 2006-2010 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.compiled import JavaLexer, CLexer, CppLexer, \
ObjectiveCLexer, DLexer
from pygments.lexers.dotnet import CSharpLexer
from pygments.lexers.agile import RubyLexer, PythonLexer, PerlLexer
from pygments.lexers.web import ActionScriptLexer
__all__ = ['RagelLexer', 'RagelEmbeddedLexer', 'RagelCLexer', 'RagelDLexer',
'RagelCppLexer', 'RagelObjectiveCLexer', 'RagelRubyLexer',
'RagelJavaLexer', 'AntlrLexer', 'AntlrPythonLexer',
'AntlrPerlLexer', 'AntlrRubyLexer', 'AntlrCppLexer',
#'AntlrCLexer',
'AntlrCSharpLexer', 'AntlrObjectiveCLexer',
'AntlrJavaLexer', "AntlrActionScriptLexer"]
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).
*New in Pygments 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_][a-zA-Z_0-9]*', 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.
*New in Pygments 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 or 0.1
class RagelRubyLexer(DelegatingLexer):
"""
A lexer for `Ragel`_ in a Ruby host file.
*New in Pygments 1.1.*
"""
name = 'Ragel in Ruby Host'
aliases = ['ragel-ruby', 'ragel-rb']
filenames = ['*.rl']
def __init__(self, **options):
super(RagelRubyLexer, self).__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.
*New in Pygments 1.1.*
"""
name = 'Ragel in C Host'
aliases = ['ragel-c']
filenames = ['*.rl']
def __init__(self, **options):
super(RagelCLexer, self).__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.
*New in Pygments 1.1.*
"""
name = 'Ragel in D Host'
aliases = ['ragel-d']
filenames = ['*.rl']
def __init__(self, **options):
super(RagelDLexer, self).__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.
*New in Pygments 1.1.*
"""
name = 'Ragel in CPP Host'
aliases = ['ragel-cpp']
filenames = ['*.rl']
def __init__(self, **options):
super(RagelCppLexer, self).__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.
*New in Pygments 1.1.*
"""
name = 'Ragel in Objective C Host'
aliases = ['ragel-objc']
filenames = ['*.rl']
def __init__(self, **options):
super(RagelObjectiveCLexer, self).__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.
*New in Pygments 1.1.*
"""
name = 'Ragel in Java Host'
aliases = ['ragel-java']
filenames = ['*.rl']
def __init__(self, **options):
super(RagelJavaLexer, self).__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.
*New in Pygments 1.1.*
.. _ANTLR: http://www.antlr.org/
"""
name = 'ANTLR'
aliases = ['antlr']
filenames = []
_id = r'[A-Za-z][A-Za-z_0-9]*'
_TOKEN_REF = r'[A-Z][A-Za-z_0-9]*'
_RULE_REF = r'[a-z][A-Za-z_0-9]*'
_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 + ')(\s*)({)',
bygroups(Keyword, Whitespace, Name.Variable, Whitespace,
Punctuation), 'action'),
# exception
(r'(catch|finally)\b', Keyword, 'exception'),
# action
(r'(@' + _id + ')(\s*)(::)?(\s*)(' + _id + ')(\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 + ')(\s*)(;)',
bygroups(Keyword, Whitespace, Name.Label, Whitespace, Punctuation)),
# ruleAction
(r'(@' + _id + ')(\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_][A-Za-z_0-9]*', Name.Constant),
# Rules start with small letter.
(r'\$?[a-z_][A-Za-z_0-9]*', 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
+ ')?(\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, '\*'))+ ')(\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
# TH: I'm not aware of any language features of C++ that will cause
# incorrect lexing of C files. Antlr doesn't appear to make a distinction,
# so just assume they're C++. No idea how to make Objective C work in the
# future.
#class AntlrCLexer(DelegatingLexer):
# """
# ANTLR with C Target
#
# *New in Pygments 1.1*
# """
#
# name = 'ANTLR With C Target'
# aliases = ['antlr-c']
# filenames = ['*.G', '*.g']
#
# def __init__(self, **options):
# super(AntlrCLexer, self).__init__(CLexer, AntlrLexer, **options)
#
# def analyse_text(text):
# return re.match(r'^\s*language\s*=\s*C\s*;', text)
class AntlrCppLexer(DelegatingLexer):
"""
`ANTLR`_ with CPP Target
*New in Pygments 1.1.*
"""
name = 'ANTLR With CPP Target'
aliases = ['antlr-cpp']
filenames = ['*.G', '*.g']
def __init__(self, **options):
super(AntlrCppLexer, self).__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
*New in Pygments 1.1.*
"""
name = 'ANTLR With ObjectiveC Target'
aliases = ['antlr-objc']
filenames = ['*.G', '*.g']
def __init__(self, **options):
super(AntlrObjectiveCLexer, self).__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
*New in Pygments 1.1.*
"""
name = 'ANTLR With C# Target'
aliases = ['antlr-csharp', 'antlr-c#']
filenames = ['*.G', '*.g']
def __init__(self, **options):
super(AntlrCSharpLexer, self).__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
*New in Pygments 1.1.*
"""
name = 'ANTLR With Python Target'
aliases = ['antlr-python']
filenames = ['*.G', '*.g']
def __init__(self, **options):
super(AntlrPythonLexer, self).__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
*New in Pygments 1.1*
"""
name = 'ANTLR With Java Target'
aliases = ['antlr-java']
filenames = ['*.G', '*.g']
def __init__(self, **options):
super(AntlrJavaLexer, self).__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
*New in Pygments 1.1.*
"""
name = 'ANTLR With Ruby Target'
aliases = ['antlr-ruby', 'antlr-rb']
filenames = ['*.G', '*.g']
def __init__(self, **options):
super(AntlrRubyLexer, self).__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
*New in Pygments 1.1.*
"""
name = 'ANTLR With Perl Target'
aliases = ['antlr-perl']
filenames = ['*.G', '*.g']
def __init__(self, **options):
super(AntlrPerlLexer, self).__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
*New in Pygments 1.1.*
"""
name = 'ANTLR With ActionScript Target'
aliases = ['antlr-as', 'antlr-actionscript']
filenames = ['*.G', '*.g']
def __init__(self, **options):
super(AntlrActionScriptLexer, self).__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)
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