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    
017    package org.jetbrains.jet.lang.types.checker;
018    
019    import org.jetbrains.annotations.NotNull;
020    import org.jetbrains.jet.lang.types.JetType;
021    import org.jetbrains.jet.lang.types.TypeConstructor;
022    
023    /**
024     * Methods of this class return true to continue type checking and false to fail
025     */
026    public 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    }