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Diffstat (limited to 'runtime/CSharp3/Sources/Antlr3.Runtime/RecognizerSharedState.cs')
| -rw-r--r-- | runtime/CSharp3/Sources/Antlr3.Runtime/RecognizerSharedState.cs | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/runtime/CSharp3/Sources/Antlr3.Runtime/RecognizerSharedState.cs b/runtime/CSharp3/Sources/Antlr3.Runtime/RecognizerSharedState.cs deleted file mode 100644 index 2b7c6cf..0000000 --- a/runtime/CSharp3/Sources/Antlr3.Runtime/RecognizerSharedState.cs +++ /dev/null @@ -1,186 +0,0 @@ -/* - * [The "BSD licence"] - * Copyright (c) 2005-2008 Terence Parr - * All rights reserved. - * - * Conversion to C#: - * Copyright (c) 2008-2009 Sam Harwell, Pixel Mine, Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -namespace Antlr.Runtime -{ - using System.Collections.Generic; - using CLSCompliant = System.CLSCompliantAttribute; - using ArgumentNullException = System.ArgumentNullException; - - /** <summary> - * The set of fields needed by an abstract recognizer to recognize input - * and recover from errors etc... As a separate state object, it can be - * shared among multiple grammars; e.g., when one grammar imports another. - * </summary> - * - * <remarks> - * These fields are publically visible but the actual state pointer per - * parser is protected. - * </remarks> - */ - public class RecognizerSharedState - { - /** <summary> - * Track the set of token types that can follow any rule invocation. - * Stack grows upwards. When it hits the max, it grows 2x in size - * and keeps going. - * </summary> - */ - //public List<BitSet> following; - public BitSet[] following; - [CLSCompliant( false )] - public int _fsp; - - /** <summary> - * This is true when we see an error and before having successfully - * matched a token. Prevents generation of more than one error message - * per error. - * </summary> - */ - public bool errorRecovery; - - /** <summary> - * The index into the input stream where the last error occurred. - * This is used to prevent infinite loops where an error is found - * but no token is consumed during recovery...another error is found, - * ad naseum. This is a failsafe mechanism to guarantee that at least - * one token/tree node is consumed for two errors. - * </summary> - */ - public int lastErrorIndex; - - /** <summary> - * In lieu of a return value, this indicates that a rule or token - * has failed to match. Reset to false upon valid token match. - * </summary> - */ - public bool failed; - - /** <summary>Did the recognizer encounter a syntax error? Track how many.</summary> */ - public int syntaxErrors; - - /** <summary> - * If 0, no backtracking is going on. Safe to exec actions etc... - * If >0 then it's the level of backtracking. - * </summary> - */ - public int backtracking; - - /** <summary> - * An array[size num rules] of Map<Integer,Integer> that tracks - * the stop token index for each rule. ruleMemo[ruleIndex] is - * the memoization table for ruleIndex. For key ruleStartIndex, you - * get back the stop token for associated rule or MEMO_RULE_FAILED. - * </summary> - * - * <remarks>This is only used if rule memoization is on (which it is by default).</remarks> - */ - public IDictionary<int, int>[] ruleMemo; - - - // LEXER FIELDS (must be in same state object to avoid casting - // constantly in generated code and Lexer object) :( - - - /** <summary> - * The goal of all lexer rules/methods is to create a token object. - * This is an instance variable as multiple rules may collaborate to - * create a single token. nextToken will return this object after - * matching lexer rule(s). If you subclass to allow multiple token - * emissions, then set this to the last token to be matched or - * something nonnull so that the auto token emit mechanism will not - * emit another token. - * </summary> - */ - public IToken token; - - /** <summary> - * What character index in the stream did the current token start at? - * Needed, for example, to get the text for current token. Set at - * the start of nextToken. - * </summary> - */ - public int tokenStartCharIndex; - - /** <summary>The line on which the first character of the token resides</summary> */ - public int tokenStartLine; - - /** <summary>The character position of first character within the line</summary> */ - public int tokenStartCharPositionInLine; - - /** <summary>The channel number for the current token</summary> */ - public int channel; - - /** <summary>The token type for the current token</summary> */ - public int type; - - /** <summary> - * You can set the text for the current token to override what is in - * the input char buffer. Use setText() or can set this instance var. - * </summary> - */ - public string text; - - public RecognizerSharedState() - { - //following = new List<BitSet>( BaseRecognizer.InitialFollowStackSize ); - following = new BitSet[BaseRecognizer.InitialFollowStackSize]; - _fsp = -1; - lastErrorIndex = -1; - tokenStartCharIndex = -1; - } - - public RecognizerSharedState( RecognizerSharedState state ) - { - if (state == null) - throw new ArgumentNullException("state"); - - following = (BitSet[])state.following.Clone(); - _fsp = state._fsp; - errorRecovery = state.errorRecovery; - lastErrorIndex = state.lastErrorIndex; - failed = state.failed; - syntaxErrors = state.syntaxErrors; - backtracking = state.backtracking; - - if ( state.ruleMemo != null ) - ruleMemo = (IDictionary<int, int>[])state.ruleMemo.Clone(); - - token = state.token; - tokenStartCharIndex = state.tokenStartCharIndex; - tokenStartCharPositionInLine = state.tokenStartCharPositionInLine; - channel = state.channel; - type = state.type; - text = state.text; - } - } -} |