KT-2633 Support multiple assignment in JVM Back-end

#KT-2633 Fixed

compiler/backend/src/org/jetbrains/jet/codegen/ExpressionCodegen.java

@@ -907,6 +907,13 @@ public class ExpressionCodegen extends JetVisitor<StackValue, StackValue> {
                 }
             }
 
+            if (statement instanceof JetMultiDeclaration) {
+                JetMultiDeclaration multiDeclaration = (JetMultiDeclaration) statement;
+                for (JetMultiDeclarationEntry entry : multiDeclaration.getEntries()) {
+                    generateLocalVariableDeclaration(entry, blockEnd, leaveTasks);
+                }
+            }
+
             if (statement instanceof JetVariableDeclaration) {
                 generateLocalVariableDeclaration((JetVariableDeclaration) statement, blockEnd, leaveTasks);
             }
@@ -2629,6 +2636,60 @@ public class ExpressionCodegen extends JetVisitor<StackValue, StackValue> {
         return StackValue.none();
     }
 
+    @Override
+    public StackValue visitMultiDeclaration(JetMultiDeclaration multiDeclaration, StackValue receiver) {
+        for (JetMultiDeclarationEntry variableDeclaration : multiDeclaration.getEntries()) {
+
+            VariableDescriptor variableDescriptor = bindingContext.get(BindingContext.VARIABLE, variableDeclaration);
+
+            if (JetPsiUtil.isScriptDeclaration(variableDeclaration)) {
+                return StackValue.none();
+            }
+            int index = lookupLocal(variableDescriptor);
+
+            if (index < 0) {
+                throw new IllegalStateException("Local variable not found for " + variableDescriptor);
+            }
+
+            Type sharedVarType = typeMapper.getSharedVarType(variableDescriptor);
+            assert variableDescriptor != null;
+
+            Type varType = asmType(variableDescriptor.getType());
+
+            JetExpression initializer = multiDeclaration.getInitializer();
+
+            ResolvedCall<FunctionDescriptor> resolvedCall = bindingContext.get(BindingContext.COMPONENT_RESOLVED_CALL, variableDeclaration);
+            if (initializer != null) {
+                JetType type = bindingContext.get(EXPRESSION_TYPE, initializer);
+                assert type != null;
+                Call call = CallMaker.makeCall(new ExpressionReceiver(initializer, type), (JetExpression) null);
+
+                if (JetPsiUtil.isScriptDeclaration(variableDeclaration)) {
+                    invokeFunction(call, resolvedCall.getResultingDescriptor(), StackValue.none(), resolvedCall);
+
+                    JetScript scriptPsi = JetPsiUtil.getScript(variableDeclaration);
+                    assert scriptPsi != null;
+                    JvmClassName scriptClassName = state.getInjector().getClosureAnnotator().classNameForScriptPsi(scriptPsi);
+                    v.putfield(scriptClassName.getInternalName(), variableDeclaration.getName(), varType.getDescriptor());
+                }
+                else if (sharedVarType == null) {
+                    invokeFunction(call, resolvedCall.getResultingDescriptor(), StackValue.none(), resolvedCall);
+
+                    v.store(index, varType);
+                }
+                else {
+                    v.load(index, TYPE_OBJECT);
+                    invokeFunction(call, resolvedCall.getResultingDescriptor(), StackValue.none(), resolvedCall);
+
+                    v.putfield(sharedVarType.getInternalName(), "ref",
+                               sharedVarType == TYPE_SHARED_VAR ? "Ljava/lang/Object;" : varType.getDescriptor());
+                }
+            }
+
+        }
+        return StackValue.none();
+    }
+
     private StackValue generateConstructorCall(
             JetCallExpression expression,
             JetSimpleNameExpression constructorReference,

compiler/frontend/src/org/jetbrains/jet/lang/resolve/BindingContext.java

@@ -82,6 +82,8 @@ public interface BindingContext {
     WritableSlice<JetExpression, CallableDescriptor> LOOP_RANGE_HAS_NEXT = Slices.createSimpleSlice();
     WritableSlice<JetExpression, FunctionDescriptor> LOOP_RANGE_NEXT = Slices.createSimpleSlice();
 
+    WritableSlice<JetMultiDeclarationEntry, ResolvedCall<FunctionDescriptor>> COMPONENT_RESOLVED_CALL = Slices.createSimpleSlice();
+
     WritableSlice<JetExpression, ResolvedCall<FunctionDescriptor>> INDEXED_LVALUE_GET = Slices.createSimpleSlice();
     WritableSlice<JetExpression, ResolvedCall<FunctionDescriptor>> INDEXED_LVALUE_SET = Slices.createSimpleSlice();
 

compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/ExpressionTypingVisitorForStatements.java

@@ -44,6 +44,7 @@ import java.util.Collection;
 
 import static org.jetbrains.jet.lang.diagnostics.Errors.*;
 import static org.jetbrains.jet.lang.resolve.BindingContext.AMBIGUOUS_REFERENCE_TARGET;
+import static org.jetbrains.jet.lang.resolve.BindingContext.COMPONENT_RESOLVED_CALL;
 import static org.jetbrains.jet.lang.resolve.BindingContext.VARIABLE_REASSIGNMENT;
 
 /**
@@ -151,8 +152,8 @@ public class ExpressionTypingVisitorForStatements extends ExpressionTypingVisito
 
             JetType componentType = null;
             if (results.isSuccess()) {
-                FunctionDescriptor resultingDescriptor = results.getResultingDescriptor();
+                context.trace.record(COMPONENT_RESOLVED_CALL, entry, results.getResultingCall());
-                componentType = resultingDescriptor.getReturnType();
+                componentType = results.getResultingDescriptor().getReturnType();
                 if (componentType != null && expectedType != TypeUtils.NO_EXPECTED_TYPE
                        && !JetTypeChecker.INSTANCE.isSubtypeOf(componentType, expectedType)) {
 

compiler/testData/codegen/multiDecl/ComplexInitializer.kt

@@ -0,0 +1,13 @@
+class A {
+    fun component1() = 1
+    fun component2() = 2
+
+}
+
+fun A.getA() = this
+
+fun box() : String {
+    val (a, b) = A().getA().getA()
+
+    return if (a == 1 && b == 2) "OK" else "fail"
+}

compiler/testData/codegen/multiDecl/SimpleVals.kt

@@ -0,0 +1,9 @@
+class A {
+    fun component1() = 1
+    fun component2() = 2
+}
+
+fun box() : String {
+    val (a, b) = A()
+    return if (a == 1 && b == 2) "OK" else "fail"
+}

compiler/testData/codegen/multiDecl/SimpleValsExtensions.kt

@@ -0,0 +1,10 @@
+class A {
+}
+
+fun A.component1() = 1
+fun A.component2() = 2
+
+fun box() : String {
+    val (a, b) = A()
+    return if (a == 1 && b == 2) "OK" else "fail"
+}

compiler/testData/codegen/multiDecl/SimpleVarsExtensions.kt

@@ -0,0 +1,10 @@
+class A {
+    fun component1() = 1
+    fun component2() = 2
+}
+
+fun box() : String {
+    var (a, b) = A()
+    a = b
+    return if (a == 2 && b == 2) "OK" else "fail"
+}

compiler/testData/codegen/multiDecl/ValCapturedInFunctionLiteral.kt

@@ -0,0 +1,13 @@
+class A {
+    fun component1() = 1
+    fun component2() = 2
+}
+
+fun box() : String {
+    val (a, b) = A()
+
+    val run = {
+        a
+    }
+    return if (run() == 1 && b == 2) "OK" else "fail"
+}

compiler/testData/codegen/multiDecl/ValCapturedInLocalFunction.kt

@@ -0,0 +1,13 @@
+class A {
+    fun component1() = 1
+    fun component2() = 2
+}
+
+fun box() : String {
+    val (a, b) = A()
+
+    fun run(): Int {
+        return a
+    }
+    return if (run() == 1 && b == 2) "OK" else "fail"
+}

compiler/testData/codegen/multiDecl/ValCapturedInObjectLiteral.kt

@@ -0,0 +1,16 @@
+class A {
+    fun component1() = 1
+    fun component2() = 2
+}
+
+
+fun box() : String {
+    val (a, b) = A()
+
+    val local = object {
+        public fun run() : Int {
+            return a
+        }
+    }
+    return if (local.run() == 1 && b == 2) "OK" else "fail"
+}

compiler/testData/codegen/multiDecl/VarCapturedInFunctionLiteral.kt

@@ -0,0 +1,15 @@
+class A {
+    fun component1() = 1
+    fun component2() = 2
+}
+
+
+fun box() : String {
+    var (a, b) = A()
+
+    val local = {
+        a = 3
+    }
+    local()
+    return if (a == 3 && b == 2) "OK" else "fail"
+}

compiler/testData/codegen/multiDecl/VarCapturedInLocalFunction.kt

@@ -0,0 +1,15 @@
+class A {
+}
+
+fun A.component1() = 1
+fun A.component2() = 2
+
+fun box() : String {
+    var (a, b) = A()
+
+    fun local() {
+        a = 3
+    }
+    local()
+    return if (a == 3 && b == 2) "OK" else "fail"
+}

compiler/testData/codegen/multiDecl/VarCapturedInObjectLiteral.kt

@@ -0,0 +1,17 @@
+class A {
+    fun component1() = 1
+    fun component2() = 2
+}
+
+
+fun box() : String {
+    var (a, b) = A()
+
+    val local = object {
+        public fun run() {
+            a = 3
+        }
+    }
+    local.run()
+    return if (a == 3 && b == 2) "OK" else "fail"
+}

compiler/tests/org/jetbrains/jet/codegen/AbstractMultiDeclTestCase.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2010-2012 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.jet.codegen;
+
+import org.jetbrains.jet.test.generator.SimpleTestClassModel;
+import org.jetbrains.jet.test.generator.TestGenerator;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.Arrays;
+
+/**
+ * @author svtk
+ */
+public abstract class AbstractMultiDeclTestCase extends CodegenTestCase {
+    @Override
+    protected String getPrefix() {
+        return "multiDecl";
+    }
+
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+        createEnvironmentWithMockJdkAndIdeaAnnotations();
+    }
+
+    public static void main(String[] args) throws IOException {
+        Class<AbstractMultiDeclTestCase> thisClass = AbstractMultiDeclTestCase.class;
+        String aPackage = thisClass.getPackage().getName();
+        new TestGenerator(
+                "compiler/tests/",
+                aPackage,
+                "MultiDeclTestGenerated",
+                thisClass,
+                Arrays.asList(
+                        new SimpleTestClassModel(new File("compiler/testData/codegen/multiDecl"), true, "kt", "blackBoxFileByFullPath")
+                ),
+                thisClass
+        ).generateAndSave();
+
+    }
+}

compiler/tests/org/jetbrains/jet/codegen/CodegenTestCase.java

@@ -20,6 +20,7 @@ import com.google.common.base.Predicates;
 import com.google.common.collect.Lists;
 import com.intellij.openapi.util.Pair;
 import com.intellij.openapi.util.SystemInfo;
+import com.intellij.openapi.util.io.FileUtil;
 import com.intellij.psi.PsiFile;
 import com.intellij.testFramework.UsefulTestCase;
 import org.jetbrains.annotations.NotNull;
@@ -121,6 +122,17 @@ public abstract class CodegenTestCase extends UsefulTestCase {
         }
     }
 
+    protected String loadFileByFullPath(final String fullPath) {
+        try {
+            File file = new File(fullPath);
+            final String content = FileUtil.loadFile(file, true);
+            myFiles = CodegenTestFiles.create(file.getName(), content, myEnvironment.getProject());
+            return content;
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
     protected void loadFiles(final String... names) {
         myFiles = CodegenTestFiles.create(myEnvironment.getProject(), names);
     }
@@ -138,6 +150,11 @@ public abstract class CodegenTestCase extends UsefulTestCase {
         blackBox();
     }
 
+    protected void blackBoxFileByFullPath(String filename) {
+        loadFileByFullPath(filename);
+        blackBox();
+    }
+
     protected void blackBoxMultiFile(String... filenames) {
         loadFiles(filenames);
         blackBox();

compiler/tests/org/jetbrains/jet/codegen/MultiDeclTestGenerated.java

@@ -0,0 +1,85 @@
+/*
+ * Copyright 2010-2012 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.jet.codegen;
+
+import junit.framework.Assert;
+import junit.framework.Test;
+import junit.framework.TestSuite;
+
+import java.io.File;
+import org.jetbrains.jet.JetTestUtils;
+import org.jetbrains.jet.test.TestMetadata;
+
+import org.jetbrains.jet.codegen.AbstractMultiDeclTestCase;
+
+/** This class is generated by {@link org.jetbrains.jet.codegen.AbstractMultiDeclTestCase}. DO NOT MODIFY MANUALLY */
+@TestMetadata("compiler/testData/codegen/multiDecl")
+public class MultiDeclTestGenerated extends AbstractMultiDeclTestCase {
+    public void testAllFilesPresentInMultiDecl() throws Exception {
+        JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), "org.jetbrains.jet.codegen.AbstractMultiDeclTestCase", new File("compiler/testData/codegen/multiDecl"), "kt", false);
+    }
+    
+    @TestMetadata("ComplexInitializer.kt")
+    public void testComplexInitializer() throws Exception {
+        blackBoxFileByFullPath("compiler/testData/codegen/multiDecl/ComplexInitializer.kt");
+    }
+    
+    @TestMetadata("SimpleVals.kt")
+    public void testSimpleVals() throws Exception {
+        blackBoxFileByFullPath("compiler/testData/codegen/multiDecl/SimpleVals.kt");
+    }
+    
+    @TestMetadata("SimpleValsExtensions.kt")
+    public void testSimpleValsExtensions() throws Exception {
+        blackBoxFileByFullPath("compiler/testData/codegen/multiDecl/SimpleValsExtensions.kt");
+    }
+    
+    @TestMetadata("SimpleVarsExtensions.kt")
+    public void testSimpleVarsExtensions() throws Exception {
+        blackBoxFileByFullPath("compiler/testData/codegen/multiDecl/SimpleVarsExtensions.kt");
+    }
+    
+    @TestMetadata("ValCapturedInFunctionLiteral.kt")
+    public void testValCapturedInFunctionLiteral() throws Exception {
+        blackBoxFileByFullPath("compiler/testData/codegen/multiDecl/ValCapturedInFunctionLiteral.kt");
+    }
+    
+    @TestMetadata("ValCapturedInLocalFunction.kt")
+    public void testValCapturedInLocalFunction() throws Exception {
+        blackBoxFileByFullPath("compiler/testData/codegen/multiDecl/ValCapturedInLocalFunction.kt");
+    }
+    
+    @TestMetadata("ValCapturedInObjectLiteral.kt")
+    public void testValCapturedInObjectLiteral() throws Exception {
+        blackBoxFileByFullPath("compiler/testData/codegen/multiDecl/ValCapturedInObjectLiteral.kt");
+    }
+    
+    @TestMetadata("VarCapturedInFunctionLiteral.kt")
+    public void testVarCapturedInFunctionLiteral() throws Exception {
+        blackBoxFileByFullPath("compiler/testData/codegen/multiDecl/VarCapturedInFunctionLiteral.kt");
+    }
+    
+    @TestMetadata("VarCapturedInLocalFunction.kt")
+    public void testVarCapturedInLocalFunction() throws Exception {
+        blackBoxFileByFullPath("compiler/testData/codegen/multiDecl/VarCapturedInLocalFunction.kt");
+    }
+    
+    @TestMetadata("VarCapturedInObjectLiteral.kt")
+    public void testVarCapturedInObjectLiteral() throws Exception {
+        blackBoxFileByFullPath("compiler/testData/codegen/multiDecl/VarCapturedInObjectLiteral.kt");
+    }
+    
+}