/*
* 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 com.google.auto.value.AutoValue;
import com.google.common.collect.ImmutableList;
import com.sun.tools.javac.code.Type;
import com.sun.tools.javac.code.Type.ForAll;
import com.sun.tools.javac.code.Types;
import java.util.List;
/**
* {@link UType} version of {@link ForAll}.
*
* @author lowasser@google.com (Louis Wasserman)
*/
@AutoValue
public abstract class UForAll extends UType {
public static UForAll create(List<UTypeVar> typeVars, UType quantifiedType) {
return new AutoValue_UForAll(ImmutableList.copyOf(typeVars), quantifiedType);
}
public abstract List<UTypeVar> getTypeVars();
public abstract UType getQuantifiedType();
@Override
public Choice<Unifier> visitForAll(ForAll target, Unifier unifier) {
Types types = unifier.types();
try {
Type myType = inline(new Inliner(unifier.getContext(), Bindings.create()));
return Choice.condition(
types.overrideEquivalent(types.erasure(myType), types.erasure(target)),
unifier);
} catch (CouldNotResolveImportException e) {
return Choice.none();
}
}
@Override
public Type inline(Inliner inliner) throws CouldNotResolveImportException {
return new ForAll(
inliner.<Type>inlineList(getTypeVars()), getQuantifiedType().inline(inliner));
}
}