1324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver/* 2324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * [The "BSD licence"] 3324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * Copyright (c) 2005-2008 Terence Parr 4324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * All rights reserved. 5324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 6324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * Conversion to C#: 7324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * Copyright (c) 2008-2009 Sam Harwell, Pixel Mine, Inc. 8324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * All rights reserved. 9324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 10324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * Redistribution and use in source and binary forms, with or without 11324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * modification, are permitted provided that the following conditions 12324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * are met: 13324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 1. Redistributions of source code must retain the above copyright 14324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * notice, this list of conditions and the following disclaimer. 15324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 2. Redistributions in binary form must reproduce the above copyright 16324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * notice, this list of conditions and the following disclaimer in the 17324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * documentation and/or other materials provided with the distribution. 18324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 3. The name of the author may not be used to endorse or promote products 19324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * derived from this software without specific prior written permission. 20324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 21324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver */ 32324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 33324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruvernamespace Antlr.Runtime { 34324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver using ConditionalAttribute = System.Diagnostics.ConditionalAttribute; 35324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 36324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /** <summary> 37324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * A parser for TokenStreams. "parser grammars" result in a subclass 38324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * of this. 39324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * </summary> 40324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver */ 41324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public class Parser : BaseRecognizer { 42324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public ITokenStream input; 43324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 44324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public Parser(ITokenStream input) 45324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver : base() { 46324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver //super(); // highlight that we go to super to set state object 47324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver TokenStream = input; 48324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 49324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 50324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public Parser(ITokenStream input, RecognizerSharedState state) 51324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver : base(state) // share the state object with another parser 52324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 53324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver this.input = input; 54324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 55324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 56324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public override void Reset() { 57324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver base.Reset(); // reset all recognizer state variables 58324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if (input != null) { 59324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver input.Seek(0); // rewind the input 60324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 61324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 62324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 63324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver protected override object GetCurrentInputSymbol(IIntStream input) { 64324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return ((ITokenStream)input).LT(1); 65324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 66324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 67324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver protected override object GetMissingSymbol(IIntStream input, 68324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver RecognitionException e, 69324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver int expectedTokenType, 70324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver BitSet follow) { 71324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver string tokenText = null; 72324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if (expectedTokenType == TokenTypes.EndOfFile) 73324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver tokenText = "<missing EOF>"; 74324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver else 75324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver tokenText = "<missing " + TokenNames[expectedTokenType] + ">"; 76324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver CommonToken t = new CommonToken(expectedTokenType, tokenText); 77324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver IToken current = ((ITokenStream)input).LT(1); 78324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if (current.Type == TokenTypes.EndOfFile) { 79324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver current = ((ITokenStream)input).LT(-1); 80324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 81324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver t.Line = current.Line; 82324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver t.CharPositionInLine = current.CharPositionInLine; 83324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver t.Channel = DefaultTokenChannel; 84324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return t; 85324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 86324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 87324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /** <summary>Gets or sets the token stream; resets the parser upon a set.</summary> */ 88324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public virtual ITokenStream TokenStream { 89324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver get { 90324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return input; 91324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 92324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver set { 93324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver input = null; 94324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver Reset(); 95324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver input = value; 96324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 97324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 98324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 99324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public override string SourceName { 100324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver get { 101324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return input.SourceName; 102324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 103324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 104324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 105324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver [Conditional("ANTLR_TRACE")] 106324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public virtual void TraceIn(string ruleName, int ruleIndex) { 107324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver base.TraceIn(ruleName, ruleIndex, input.LT(1)); 108324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 109324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 110324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver [Conditional("ANTLR_TRACE")] 111324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public virtual void TraceOut(string ruleName, int ruleIndex) { 112324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver base.TraceOut(ruleName, ruleIndex, input.LT(1)); 113324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 114324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 115324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver} 116