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.Tree 34324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver{ 35324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver using InvalidOperationException = System.InvalidOperationException; 36324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 37324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public class TreePatternParser 38324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 39324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver protected TreePatternLexer tokenizer; 40324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver protected int ttype; 41324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver protected TreeWizard wizard; 42324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver protected ITreeAdaptor adaptor; 43324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 44324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public TreePatternParser( TreePatternLexer tokenizer, TreeWizard wizard, ITreeAdaptor adaptor ) 45324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 46324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver this.tokenizer = tokenizer; 47324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver this.wizard = wizard; 48324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver this.adaptor = adaptor; 49324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ttype = tokenizer.NextToken(); // kickstart 50324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 51324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 52324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public virtual object Pattern() 53324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 54324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( ttype == TreePatternLexer.Begin ) 55324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 56324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return ParseTree(); 57324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 58324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver else if ( ttype == TreePatternLexer.Id ) 59324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 60324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver object node = ParseNode(); 61324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( ttype == CharStreamConstants.EndOfFile ) 62324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 63324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return node; 64324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 65324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return null; // extra junk on end 66324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 67324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return null; 68324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 69324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 70324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public virtual object ParseTree() 71324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 72324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( ttype != TreePatternLexer.Begin ) 73324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver throw new InvalidOperationException("No beginning."); 74324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 75324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ttype = tokenizer.NextToken(); 76324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver object root = ParseNode(); 77324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( root == null ) 78324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 79324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return null; 80324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 81324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver while ( ttype == TreePatternLexer.Begin || 82324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ttype == TreePatternLexer.Id || 83324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ttype == TreePatternLexer.Percent || 84324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ttype == TreePatternLexer.Dot ) 85324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 86324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( ttype == TreePatternLexer.Begin ) 87324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 88324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver object subtree = ParseTree(); 89324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver adaptor.AddChild( root, subtree ); 90324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 91324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver else 92324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 93324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver object child = ParseNode(); 94324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( child == null ) 95324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 96324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return null; 97324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 98324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver adaptor.AddChild( root, child ); 99324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 100324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 101324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 102324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( ttype != TreePatternLexer.End ) 103324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver throw new InvalidOperationException("No end."); 104324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 105324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ttype = tokenizer.NextToken(); 106324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return root; 107324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 108324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 109324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public virtual object ParseNode() 110324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 111324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // "%label:" prefix 112324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver string label = null; 113324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( ttype == TreePatternLexer.Percent ) 114324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 115324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ttype = tokenizer.NextToken(); 116324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( ttype != TreePatternLexer.Id ) 117324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 118324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return null; 119324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 120324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver label = tokenizer.sval.ToString(); 121324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ttype = tokenizer.NextToken(); 122324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( ttype != TreePatternLexer.Colon ) 123324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 124324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return null; 125324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 126324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ttype = tokenizer.NextToken(); // move to ID following colon 127324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 128324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 129324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // Wildcard? 130324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( ttype == TreePatternLexer.Dot ) 131324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 132324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ttype = tokenizer.NextToken(); 133324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver IToken wildcardPayload = new CommonToken( 0, "." ); 134324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver TreeWizard.TreePattern node = 135324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver new TreeWizard.WildcardTreePattern( wildcardPayload ); 136324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( label != null ) 137324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 138324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver node.label = label; 139324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 140324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return node; 141324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 142324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 143324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // "ID" or "ID[arg]" 144324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( ttype != TreePatternLexer.Id ) 145324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 146324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return null; 147324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 148324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver string tokenName = tokenizer.sval.ToString(); 149324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ttype = tokenizer.NextToken(); 150324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( tokenName.Equals( "nil" ) ) 151324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 152324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return adaptor.Nil(); 153324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 154324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver string text = tokenName; 155324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // check for arg 156324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver string arg = null; 157324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( ttype == TreePatternLexer.Arg ) 158324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 159324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver arg = tokenizer.sval.ToString(); 160324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver text = arg; 161324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ttype = tokenizer.NextToken(); 162324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 163324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 164324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // create node 165324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver int treeNodeType = wizard.GetTokenType( tokenName ); 166324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( treeNodeType == TokenTypes.Invalid ) 167324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 168324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return null; 169324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 170324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver object node2; 171324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver node2 = adaptor.Create( treeNodeType, text ); 172324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( label != null && node2.GetType() == typeof( TreeWizard.TreePattern ) ) 173324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 174324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ( (TreeWizard.TreePattern)node2 ).label = label; 175324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 176324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( arg != null && node2.GetType() == typeof( TreeWizard.TreePattern ) ) 177324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 178324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ( (TreeWizard.TreePattern)node2 ).hasTextArg = true; 179324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 180324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return node2; 181324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 182324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 183324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver} 184