001/*
002 * Copyright 2010-2013 JetBrains s.r.o.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.jetbrains.jet.lang.types.checker;
018
019import org.jetbrains.annotations.NotNull;
020import org.jetbrains.jet.lang.types.JetType;
021import org.jetbrains.jet.lang.types.TypeConstructor;
022
023/**
024 * Methods of this class return true to continue type checking and false to fail
025 */
026public interface TypingConstraints {
027    boolean assertEqualTypes(@NotNull JetType a, @NotNull JetType b, @NotNull TypeCheckingProcedure typeCheckingProcedure);
028
029    boolean assertEqualTypeConstructors(@NotNull TypeConstructor a, @NotNull TypeConstructor b);
030
031    boolean assertSubtype(@NotNull JetType subtype, @NotNull JetType supertype, @NotNull TypeCheckingProcedure typeCheckingProcedure);
032
033    boolean noCorrespondingSupertype(@NotNull JetType subtype, @NotNull JetType supertype);
034}