/*
* [The "BSD license"]
* Copyright (c) 2012 Terence Parr
* Copyright (c) 2012 Sam Harwell
* 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.
*/
package org.antlr.v4.parse;
import org.antlr.runtime.CommonToken;
import org.antlr.runtime.Token;
import org.antlr.runtime.tree.CommonTreeAdaptor;
import org.antlr.v4.tool.ast.GrammarAST;
import org.antlr.v4.tool.ast.GrammarASTErrorNode;
import org.antlr.v4.tool.ast.RuleAST;
import org.antlr.v4.tool.ast.TerminalAST;
public class GrammarASTAdaptor extends CommonTreeAdaptor {
org.antlr.runtime.CharStream input; // where we can find chars ref'd by tokens in tree
public GrammarASTAdaptor() { }
public GrammarASTAdaptor(org.antlr.runtime.CharStream input) { this.input = input; }
@Override
public Object create(Token token) {
return new GrammarAST(token);
}
@Override
/** Make sure even imaginary nodes know the input stream */
public Object create(int tokenType, String text) {
GrammarAST t;
if ( tokenType==ANTLRParser.RULE ) {
// needed by TreeWizard to make RULE tree
t = new RuleAST(new CommonToken(tokenType, text));
}
else if ( tokenType==ANTLRParser.STRING_LITERAL ) {
// implicit lexer construction done with wizard; needs this node type
// whereas grammar ANTLRParser.g can use token option to spec node type
t = new TerminalAST(new CommonToken(tokenType, text));
}
else {
t = (GrammarAST)super.create(tokenType, text);
}
t.token.setInputStream(input);
return t;
}
@Override
public Object dupNode(Object t) {
if ( t==null ) return null;
return ((GrammarAST)t).dupNode(); //create(((GrammarAST)t).token);
}
@Override
public Object errorNode(org.antlr.runtime.TokenStream input, org.antlr.runtime.Token start, org.antlr.runtime.Token stop,
org.antlr.runtime.RecognitionException e)
{
return new GrammarASTErrorNode(input, start, stop, e);
}
}