001    /*
002     * Copyright 2010-2015 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.kotlin.resolve;
018    
019    import org.jetbrains.annotations.NotNull;
020    import org.jetbrains.kotlin.descriptors.ScriptDescriptor;
021    import org.jetbrains.kotlin.psi.KtScript;
022    import org.jetbrains.kotlin.resolve.calls.smartcasts.DataFlowInfo;
023    import org.jetbrains.kotlin.resolve.lazy.ForceResolveUtil;
024    import org.jetbrains.kotlin.types.ErrorUtils;
025    import org.jetbrains.kotlin.types.KotlinType;
026    import org.jetbrains.kotlin.types.expressions.CoercionStrategy;
027    import org.jetbrains.kotlin.types.expressions.ExpressionTypingContext;
028    import org.jetbrains.kotlin.types.expressions.ExpressionTypingServices;
029    import org.jetbrains.kotlin.types.expressions.PreliminaryDeclarationVisitor;
030    
031    import java.util.Map;
032    
033    import static org.jetbrains.kotlin.types.TypeUtils.NO_EXPECTED_TYPE;
034    
035    
036    // SCRIPT: resolve symbols in scripts
037    public class ScriptBodyResolver {
038    
039        @NotNull private final ExpressionTypingServices expressionTypingServices;
040    
041        public ScriptBodyResolver(
042                @NotNull ExpressionTypingServices expressionTypingServices
043        ) {
044            this.expressionTypingServices = expressionTypingServices;
045        }
046    
047        public void resolveScriptBodies(@NotNull BodiesResolveContext c) {
048            for (Map.Entry<KtScript, ScriptDescriptor> e : c.getScripts().entrySet()) {
049                ScriptDescriptor descriptor = e.getValue();
050                ForceResolveUtil.forceResolveAllContents(descriptor);
051            }
052        }
053    
054        @NotNull
055        public KotlinType resolveScriptReturnType(
056                @NotNull KtScript script,
057                @NotNull ScriptDescriptor scriptDescriptor,
058                @NotNull BindingTrace trace
059        ) {
060            // Resolve all contents of the script
061            ExpressionTypingContext context = ExpressionTypingContext.newContext(
062                    trace,
063                    scriptDescriptor.getScopeForBodyResolution(),
064                    DataFlowInfo.EMPTY,
065                    NO_EXPECTED_TYPE
066            );
067            PreliminaryDeclarationVisitor.Companion.createForDeclaration(script, trace);
068            KotlinType returnType = expressionTypingServices.getBlockReturnedType(script.getBlockExpression(), CoercionStrategy.NO_COERCION, context).getType();
069            if (returnType == null) {
070                returnType = ErrorUtils.createErrorType("getBlockReturnedType returned null");
071            }
072            return returnType;
073        }
074    }