org.jetbrains.kotlin.types.checker.JetTypeChecker Maven / Gradle / Ivy
/*
* Copyright 2010-2015 JetBrains s.r.o.
*
* 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 org.jetbrains.kotlin.types.checker;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.kotlin.types.JetType;
import org.jetbrains.kotlin.types.TypeConstructor;
public class JetTypeChecker {
public interface TypeConstructorEquality {
boolean equals(@NotNull TypeConstructor a, @NotNull TypeConstructor b);
}
public static final JetTypeChecker DEFAULT = new JetTypeChecker(new TypeCheckingProcedure(new TypeCheckerProcedureCallbacksImpl()));
public static final JetTypeChecker ERROR_TYPES_ARE_EQUAL_TO_ANYTHING = new JetTypeChecker(new TypeCheckingProcedure(new TypeCheckerProcedureCallbacksImpl() {
@Override
public boolean assertEqualTypes(@NotNull JetType a, @NotNull JetType b, @NotNull TypeCheckingProcedure typeCheckingProcedure) {
return a.isError() || b.isError() || super.assertEqualTypes(a, b, typeCheckingProcedure);
}
}));
public static final JetTypeChecker FLEXIBLE_UNEQUAL_TO_INFLEXIBLE = new JetTypeChecker(new TypeCheckingProcedure(new TypeCheckerProcedureCallbacksImpl()) {
@Override
protected boolean heterogeneousEquivalence(JetType inflexibleType, JetType flexibleType) {
return false;
}
});
@NotNull
public static JetTypeChecker withAxioms(@NotNull final TypeConstructorEquality equalityAxioms) {
return new JetTypeChecker(new TypeCheckingProcedure(new TypeCheckerProcedureCallbacksImpl() {
@Override
public boolean assertEqualTypeConstructors(@NotNull TypeConstructor constructor1, @NotNull TypeConstructor constructor2) {
return constructor1.equals(constructor2) || equalityAxioms.equals(constructor1, constructor2);
}
}));
}
private final TypeCheckingProcedure procedure;
private JetTypeChecker(@NotNull TypeCheckingProcedure procedure) {
this.procedure = procedure;
}
public boolean isSubtypeOf(@NotNull JetType subtype, @NotNull JetType supertype) {
return procedure.isSubtypeOf(subtype, supertype);
}
public boolean equalTypes(@NotNull JetType a, @NotNull JetType b) {
return procedure.equalTypes(a, b);
}
}