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Diffstat (limited to 'runtime/CSharp3/Sources/Antlr3.Runtime/Tree/TreeParser.cs')
| -rw-r--r-- | runtime/CSharp3/Sources/Antlr3.Runtime/Tree/TreeParser.cs | 209 |
1 files changed, 0 insertions, 209 deletions
diff --git a/runtime/CSharp3/Sources/Antlr3.Runtime/Tree/TreeParser.cs b/runtime/CSharp3/Sources/Antlr3.Runtime/Tree/TreeParser.cs deleted file mode 100644 index f5a1508..0000000 --- a/runtime/CSharp3/Sources/Antlr3.Runtime/Tree/TreeParser.cs +++ /dev/null @@ -1,209 +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.Tree -{ - using ConditionalAttribute = System.Diagnostics.ConditionalAttribute; - using Regex = System.Text.RegularExpressions.Regex; - using RegexOptions = System.Text.RegularExpressions.RegexOptions; - - /** <summary> - * A parser for a stream of tree nodes. "tree grammars" result in a subclass - * of this. All the error reporting and recovery is shared with Parser via - * the BaseRecognizer superclass. - * </summary> - */ - public class TreeParser : BaseRecognizer - { - public const int DOWN = TokenTypes.Down; - public const int UP = TokenTypes.Up; - - // precompiled regex used by inContext - static string dotdot = ".*[^.]\\.\\.[^.].*"; - static string doubleEtc = ".*\\.\\.\\.\\s+\\.\\.\\..*"; - static Regex dotdotPattern = new Regex( dotdot, RegexOptions.Compiled ); - static Regex doubleEtcPattern = new Regex( doubleEtc, RegexOptions.Compiled ); - - protected ITreeNodeStream input; - - public TreeParser( ITreeNodeStream input ) - : base() // highlight that we go to super to set state object - { - this.input = input; - } - - public TreeParser( ITreeNodeStream input, RecognizerSharedState state ) - : base( state ) // share the state object with another parser - { - this.input = input; - } - - public override void Reset() - { - base.Reset(); // reset all recognizer state variables - if ( input != null ) - { - input.Seek( 0 ); // rewind the input - } - } - - /** <summary>Set the input stream</summary> */ - public virtual void SetTreeNodeStream( ITreeNodeStream input ) - { - this.input = input; - } - - public virtual ITreeNodeStream GetTreeNodeStream() - { - return input; - } - - public override string SourceName - { - get - { - return input.SourceName; - } - } - - protected override object GetCurrentInputSymbol( IIntStream input ) - { - return ( (ITreeNodeStream)input ).LT( 1 ); - } - - protected override object GetMissingSymbol( IIntStream input, - RecognitionException e, - int expectedTokenType, - BitSet follow ) - { - string tokenText = - "<missing " + TokenNames[expectedTokenType] + ">"; - ITreeAdaptor adaptor = ((ITreeNodeStream)e.Input).TreeAdaptor; - return adaptor.Create(new CommonToken(expectedTokenType, tokenText)); - } - - /** <summary> - * Match '.' in tree parser has special meaning. Skip node or - * entire tree if node has children. If children, scan until - * corresponding UP node. - * </summary> - */ - public override void MatchAny( IIntStream ignore ) - { - state.errorRecovery = false; - state.failed = false; - // always consume the current node - input.Consume(); - // if the next node is DOWN, then the current node is a subtree: - // skip to corresponding UP. must count nesting level to get right UP - int look = input.LA( 1 ); - if ( look == DOWN ) - { - input.Consume(); - int level = 1; - while ( level > 0 ) - { - switch ( input.LA( 1 ) ) - { - case DOWN: - level++; - break; - case UP: - level--; - break; - case TokenTypes.EndOfFile: - return; - default: - break; - } - input.Consume(); - } - } - } - - /** <summary> - * We have DOWN/UP nodes in the stream that have no line info; override. - * plus we want to alter the exception type. Don't try to recover - * from tree parser errors inline... - * </summary> - */ - protected override object RecoverFromMismatchedToken( IIntStream input, int ttype, BitSet follow ) - { - throw new MismatchedTreeNodeException( ttype, (ITreeNodeStream)input ); - } - - /** <summary> - * Prefix error message with the grammar name because message is - * always intended for the programmer because the parser built - * the input tree not the user. - * </summary> - */ - public override string GetErrorHeader( RecognitionException e ) - { - return GrammarFileName + ": node from " + - ( e.ApproximateLineInfo ? "after " : "" ) + "line " + e.Line + ":" + e.CharPositionInLine; - } - - /** <summary> - * Tree parsers parse nodes they usually have a token object as - * payload. Set the exception token and do the default behavior. - * </summary> - */ - public override string GetErrorMessage( RecognitionException e, string[] tokenNames ) - { - if ( this is TreeParser ) - { - ITreeAdaptor adaptor = ( (ITreeNodeStream)e.Input ).TreeAdaptor; - e.Token = adaptor.GetToken( e.Node ); - if ( e.Token == null ) - { // could be an UP/DOWN node - e.Token = new CommonToken( adaptor.GetType( e.Node ), - adaptor.GetText( e.Node ) ); - } - } - return base.GetErrorMessage( e, tokenNames ); - } - - [Conditional("ANTLR_TRACE")] - public virtual void TraceIn( string ruleName, int ruleIndex ) - { - base.TraceIn( ruleName, ruleIndex, input.LT( 1 ) ); - } - - [Conditional("ANTLR_TRACE")] - public virtual void TraceOut( string ruleName, int ruleIndex ) - { - base.TraceOut( ruleName, ruleIndex, input.LT( 1 ) ); - } - - } -} |