/*
* Copyright 2013 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.errorprone.refaster;
import static com.google.common.base.Preconditions.checkArgument;
import com.google.auto.value.AutoValue;
import com.google.common.collect.ImmutableBiMap;
import com.sun.source.tree.TreeVisitor;
import com.sun.source.tree.UnaryTree;
import com.sun.tools.javac.tree.JCTree;
import com.sun.tools.javac.tree.JCTree.JCExpression;
import javax.annotation.Nullable;
/**
* {@link UTree} version of {@link UnaryTree}.
*
* @author lowasser@google.com (Louis Wasserman)
*/
@AutoValue
abstract class UUnary extends UExpression implements UnaryTree {
private static final ImmutableBiMap<Kind, Integer> UNARY_OP_CODES =
new ImmutableBiMap.Builder<Kind, Integer>()
.put(Kind.PREFIX_INCREMENT, JCTree.PREINC)
.put(Kind.PREFIX_DECREMENT, JCTree.PREDEC)
.put(Kind.POSTFIX_INCREMENT, JCTree.POSTINC)
.put(Kind.POSTFIX_DECREMENT, JCTree.POSTDEC)
.put(Kind.UNARY_PLUS, JCTree.POS)
.put(Kind.UNARY_MINUS, JCTree.NEG)
.put(Kind.BITWISE_COMPLEMENT, JCTree.COMPL)
.put(Kind.LOGICAL_COMPLEMENT, JCTree.NOT)
.build();
public static UUnary create(Kind unaryOp, UExpression expression) {
checkArgument(UNARY_OP_CODES.containsKey(unaryOp),
"%s is not a recognized unary operation", unaryOp);
return new AutoValue_UUnary(unaryOp, expression);
}
@Override
public abstract Kind getKind();
@Override
public abstract UExpression getExpression();
@Override
@Nullable
public Unifier visitUnary(UnaryTree unary, @Nullable Unifier unifier) {
unifier = getKind().equals(unary.getKind()) ? unifier : null;
return getExpression().unify(UParens.skipParens(unary.getExpression()), unifier);
}
@Override
public <R, D> R accept(TreeVisitor<R, D> visitor, D data) {
return visitor.visitUnary(this, data);
}
@Override
public JCExpression inline(Inliner inliner) throws CouldNotResolveImportException {
return inliner.maker().Unary(UNARY_OP_CODES.get(getKind()), getExpression().inline(inliner));
}
@Override
public UExpression negate() {
return (getKind() == Kind.LOGICAL_COMPLEMENT) ? getExpression() : super.negate();
}
}