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/*
* [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.tool;
import org.antlr.runtime.BitSet;
import org.antlr.v4.parse.ANTLRParser;
import org.antlr.v4.tool.ast.GrammarAST;
public class LabelElementPair {
public static final BitSet tokenTypeForTokens = new BitSet();
static {
tokenTypeForTokens.add(ANTLRParser.TOKEN_REF);
tokenTypeForTokens.add(ANTLRParser.STRING_LITERAL);
tokenTypeForTokens.add(ANTLRParser.WILDCARD);
}
public GrammarAST label;
public GrammarAST element;
public LabelType type;
public LabelElementPair(Grammar g, GrammarAST label, GrammarAST element, int labelOp) {
this.label = label;
this.element = element;
// compute general case for label type
if ( element.getFirstDescendantWithType(tokenTypeForTokens)!=null ) {
if ( labelOp==ANTLRParser.ASSIGN ) type = LabelType.TOKEN_LABEL;
else type = LabelType.TOKEN_LIST_LABEL;
}
else if ( element.getFirstDescendantWithType(ANTLRParser.RULE_REF)!=null ) {
if ( labelOp==ANTLRParser.ASSIGN ) type = LabelType.RULE_LABEL;
else type = LabelType.RULE_LIST_LABEL;
}
// now reset if lexer and string
if ( g.isLexer() ) {
if ( element.getFirstDescendantWithType(ANTLRParser.STRING_LITERAL)!=null ) {
if ( labelOp==ANTLRParser.ASSIGN ) type = LabelType.LEXER_STRING_LABEL;
}
}
}
@Override
public String toString() {
return label.getText()+" "+type+" "+element.toString();
}
}
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