1""" @package antlr3 2@brief ANTLR3 runtime package 3 4This module contains all support classes, which are needed to use recognizers 5generated by ANTLR3. 6 7@mainpage 8 9\note Please be warned that the line numbers in the API documentation do not 10match the real locations in the source code of the package. This is an 11unintended artifact of doxygen, which I could only convince to use the 12correct module names by concatenating all files from the package into a single 13module file... 14 15Here is a little overview over the most commonly used classes provided by 16this runtime: 17 18@section recognizers Recognizers 19 20These recognizers are baseclasses for the code which is generated by ANTLR3. 21 22- BaseRecognizer: Base class with common recognizer functionality. 23- Lexer: Base class for lexers. 24- Parser: Base class for parsers. 25- tree.TreeParser: Base class for %tree parser. 26 27@section streams Streams 28 29Each recognizer pulls its input from one of the stream classes below. Streams 30handle stuff like buffering, look-ahead and seeking. 31 32A character stream is usually the first element in the pipeline of a typical 33ANTLR3 application. It is used as the input for a Lexer. 34 35- ANTLRStringStream: Reads from a string objects. The input should be a unicode 36 object, or ANTLR3 will have trouble decoding non-ascii data. 37- ANTLRFileStream: Opens a file and read the contents, with optional character 38 decoding. 39- ANTLRInputStream: Reads the date from a file-like object, with optional 40 character decoding. 41 42A Parser needs a TokenStream as input (which in turn is usually fed by a 43Lexer): 44 45- CommonTokenStream: A basic and most commonly used TokenStream 46 implementation. 47- TokenRewriteStream: A modification of CommonTokenStream that allows the 48 stream to be altered (by the Parser). See the 'tweak' example for a usecase. 49 50And tree.TreeParser finally fetches its input from a tree.TreeNodeStream: 51 52- tree.CommonTreeNodeStream: A basic and most commonly used tree.TreeNodeStream 53 implementation. 54 55 56@section tokenstrees Tokens and Trees 57 58A Lexer emits Token objects which are usually buffered by a TokenStream. A 59Parser can build a Tree, if the output=AST option has been set in the grammar. 60 61The runtime provides these Token implementations: 62 63- CommonToken: A basic and most commonly used Token implementation. 64- ClassicToken: A Token object as used in ANTLR 2.x, used to %tree 65 construction. 66 67Tree objects are wrapper for Token objects. 68 69- tree.CommonTree: A basic and most commonly used Tree implementation. 70 71A tree.TreeAdaptor is used by the parser to create tree.Tree objects for the 72input Token objects. 73 74- tree.CommonTreeAdaptor: A basic and most commonly used tree.TreeAdaptor 75implementation. 76 77 78@section Exceptions 79 80RecognitionException are generated, when a recognizer encounters incorrect 81or unexpected input. 82 83- RecognitionException 84 - MismatchedRangeException 85 - MismatchedSetException 86 - MismatchedNotSetException 87 . 88 - MismatchedTokenException 89 - MismatchedTreeNodeException 90 - NoViableAltException 91 - EarlyExitException 92 - FailedPredicateException 93 . 94. 95 96A tree.RewriteCardinalityException is raised, when the parsers hits a 97cardinality mismatch during AST construction. Although this is basically a 98bug in your grammar, it can only be detected at runtime. 99 100- tree.RewriteCardinalityException 101 - tree.RewriteEarlyExitException 102 - tree.RewriteEmptyStreamException 103 . 104. 105 106""" 107 108# tree.RewriteRuleElementStream 109# tree.RewriteRuleSubtreeStream 110# tree.RewriteRuleTokenStream 111# CharStream 112# DFA 113# TokenSource 114 115# [The "BSD licence"] 116# Copyright (c) 2005-2008 Terence Parr 117# All rights reserved. 118# 119# Redistribution and use in source and binary forms, with or without 120# modification, are permitted provided that the following conditions 121# are met: 122# 1. Redistributions of source code must retain the above copyright 123# notice, this list of conditions and the following disclaimer. 124# 2. Redistributions in binary form must reproduce the above copyright 125# notice, this list of conditions and the following disclaimer in the 126# documentation and/or other materials provided with the distribution. 127# 3. The name of the author may not be used to endorse or promote products 128# derived from this software without specific prior written permission. 129# 130# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 131# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 132# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 133# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 134# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 135# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 136# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 137# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 138# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 139# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 140 141__version__ = '3.4' 142 143# This runtime is compatible with generated parsers using the following 144# API versions. 'HEAD' is only used by unittests. 145compatible_api_versions = ['HEAD', 1] 146 147from constants import * 148from dfa import * 149from exceptions import * 150from recognizers import * 151from streams import * 152from tokens import * 153