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.JetScript;
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.JetType;
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    
030    import java.util.Map;
031    
032    import static org.jetbrains.kotlin.types.TypeUtils.NO_EXPECTED_TYPE;
033    
034    
035    // SCRIPT: resolve symbols in scripts
036    public class ScriptBodyResolver {
037    
038        @NotNull private final ExpressionTypingServices expressionTypingServices;
039    
040        public ScriptBodyResolver(
041                @NotNull ExpressionTypingServices expressionTypingServices
042        ) {
043            this.expressionTypingServices = expressionTypingServices;
044        }
045    
046        public void resolveScriptBodies(@NotNull BodiesResolveContext c) {
047            for (Map.Entry<JetScript, ScriptDescriptor> e : c.getScripts().entrySet()) {
048                ScriptDescriptor descriptor = e.getValue();
049                ForceResolveUtil.forceResolveAllContents(descriptor);
050            }
051        }
052    
053        @NotNull
054        public JetType resolveScriptReturnType(
055                @NotNull JetScript script,
056                @NotNull ScriptDescriptor scriptDescriptor,
057                @NotNull BindingTrace trace
058        ) {
059            // Resolve all contents of the script
060            ExpressionTypingContext context = ExpressionTypingContext.newContext(
061                    trace,
062                    scriptDescriptor.getScopeForBodyResolution(),
063                    DataFlowInfo.EMPTY,
064                    NO_EXPECTED_TYPE
065            );
066            JetType returnType = expressionTypingServices.getBlockReturnedType(script.getBlockExpression(), CoercionStrategy.NO_COERCION, context).getType();
067            if (returnType == null) {
068                returnType = ErrorUtils.createErrorType("getBlockReturnedType returned null");
069            }
070            return returnType;
071        }
072    }