/*
* [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.codegen.model;
import org.antlr.v4.codegen.ActionTranslator;
import org.antlr.v4.codegen.CodeGenerator;
import org.antlr.v4.codegen.OutputModelFactory;
import org.antlr.v4.codegen.model.chunk.ActionChunk;
import org.antlr.v4.runtime.atn.AbstractPredicateTransition;
import org.antlr.v4.runtime.misc.NotNull;
import org.antlr.v4.tool.ast.ActionAST;
import org.antlr.v4.tool.ast.GrammarAST;
import java.util.List;
/** */
public class SemPred extends Action {
/**
* The user-specified terminal option {@code fail}, if it was used and the
* value is a string literal. For example:
*
* <p>
* {@code {pred}?<fail='message'>}</p>
*/
public String msg;
/**
* The predicate string with <code>{</code> and <code>}?</code> stripped from the ends.
*/
public String predicate;
/**
* The translated chunks of the user-specified terminal option {@code fail},
* if it was used and the value is an action. For example:
*
* <p>
* {@code {pred}?<fail={"Java literal"}>}</p>
*/
@ModelElement public List<ActionChunk> failChunks;
public SemPred(OutputModelFactory factory, @NotNull ActionAST ast) {
super(factory,ast);
assert ast.atnState != null
&& ast.atnState.getNumberOfTransitions() == 1
&& ast.atnState.transition(0) instanceof AbstractPredicateTransition;
GrammarAST failNode = ast.getOptionAST("fail");
CodeGenerator gen = factory.getGenerator();
predicate = ast.getText();
if (predicate.startsWith("{") && predicate.endsWith("}?")) {
predicate = predicate.substring(1, predicate.length() - 2);
}
predicate = gen.getTarget().getTargetStringLiteralFromString(predicate);
if ( failNode==null ) return;
if ( failNode instanceof ActionAST ) {
ActionAST failActionNode = (ActionAST)failNode;
RuleFunction rf = factory.getCurrentRuleFunction();
failChunks = ActionTranslator.translateAction(factory, rf,
failActionNode.token,
failActionNode);
}
else {
msg = gen.getTarget().getTargetStringLiteralFromANTLRStringLiteral(gen,
failNode.getText(),
true);
}
}
}