Added support spread operator in JS-Backend.

js/js.tests/test/org/jetbrains/k2js/test/semantics/FunctionTest.java

@@ -85,7 +85,7 @@ public class FunctionTest extends AbstractExpressionTest {
 
 
     public void testVararg() throws Exception {
-        fooBoxTest();
+        checkFooBoxIsOk();
     }
 
     public void testKT921() throws Exception {

js/js.tests/test/org/jetbrains/k2js/test/semantics/NativeInteropTest.java

@@ -50,7 +50,7 @@ public final class NativeInteropTest extends SingleFileTranslationTest {
     }
 
     public void testVararg() throws Exception {
-        fooBoxTest();
+        checkFooBoxIsOk();
     }
 
     public void testUndefined() throws Exception {

js/js.translator/src/org/jetbrains/k2js/translate/reference/CallExpressionTranslator.java

@@ -16,7 +16,8 @@
 
 package org.jetbrains.k2js.translate.reference;
 
-import com.google.dart.compiler.backend.js.ast.JsExpression;
+import com.google.dart.compiler.backend.js.ast.*;
+import com.intellij.util.SmartList;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.jet.lang.descriptors.CallableDescriptor;
@@ -24,10 +25,13 @@ import org.jetbrains.jet.lang.descriptors.ValueParameterDescriptor;
 import org.jetbrains.jet.lang.psi.JetCallExpression;
 import org.jetbrains.jet.lang.psi.JetExpression;
 import org.jetbrains.jet.lang.psi.JetSimpleNameExpression;
-import org.jetbrains.jet.lang.resolve.calls.util.ExpressionAsFunctionDescriptor;
+import org.jetbrains.jet.lang.psi.ValueArgument;
 import org.jetbrains.jet.lang.resolve.calls.model.ResolvedCall;
 import org.jetbrains.jet.lang.resolve.calls.model.ResolvedValueArgument;
+import org.jetbrains.jet.lang.resolve.calls.model.VarargValueArgument;
 import org.jetbrains.jet.lang.resolve.calls.model.VariableAsFunctionResolvedCall;
+import org.jetbrains.jet.lang.resolve.calls.util.ExpressionAsFunctionDescriptor;
+import org.jetbrains.k2js.translate.context.TemporaryVariable;
 import org.jetbrains.k2js.translate.context.TranslationContext;
 import org.jetbrains.k2js.translate.general.Translation;
 import org.jetbrains.k2js.translate.utils.AnnotationsUtils;
@@ -52,6 +56,11 @@ public final class CallExpressionTranslator extends AbstractCallExpressionTransl
     }
 
     private final boolean isNativeFunctionCall;
+    private boolean hasSpreadOperator = false;
+    private TemporaryVariable cachedReceiver = null;
+    private List<JsExpression> translatedArguments = null;
+    private JsExpression translatedReceiver = null;
+    private JsExpression translatedCallee = null;
 
     private CallExpressionTranslator(@NotNull JetCallExpression expression,
             @Nullable JsExpression receiver,
@@ -62,15 +71,23 @@ public final class CallExpressionTranslator extends AbstractCallExpressionTransl
 
     @NotNull
     private JsExpression translate() {
+        prepareToBuildCall();
+
         return CallBuilder.build(context())
-                .receiver(getReceiver())
-                .callee(getCalleeExpression())
-                .args(translateArguments())
+                .receiver(translatedReceiver)
+                .callee(translatedCallee)
+                .args(translatedArguments)
                 .resolvedCall(getResolvedCall())
                 .type(callType)
                 .translate();
     }
 
+    private void prepareToBuildCall() {
+        translatedArguments = translateArguments();
+        translatedReceiver = getReceiver();
+        translatedCallee = getCalleeExpression();
+    }
+
     @NotNull
     private ResolvedCall<?> getResolvedCall() {
         if (resolvedCall instanceof VariableAsFunctionResolvedCall) {
@@ -81,14 +98,23 @@ public final class CallExpressionTranslator extends AbstractCallExpressionTransl
 
     @Nullable
     private JsExpression getReceiver() {
-        if (receiver != null) {
-            return receiver;
+        assert translatedArguments != null : "the results of this function depends on the results of translateArguments()";
+        if (receiver == null) {
+            return null;
         }
-        return null;
+        if (cachedReceiver != null) {
+            return cachedReceiver.assignmentExpression();
+        }
+        return receiver;
     }
 
     @Nullable
     private JsExpression getCalleeExpression() {
+        assert translatedArguments != null : "the results of this function depends on the results of translateArguments()";
+        if (isNativeFunctionCall && hasSpreadOperator) {
+            String functionName = resolvedCall.getCandidateDescriptor().getOriginal().getName().getIdentifier();
+            return new JsNameRef("apply", functionName);
+        }
         CallableDescriptor candidateDescriptor = resolvedCall.getCandidateDescriptor();
         if (candidateDescriptor instanceof ExpressionAsFunctionDescriptor) {
             return translateExpressionAsFunction();
@@ -118,15 +144,47 @@ public final class CallExpressionTranslator extends AbstractCallExpressionTransl
     @NotNull
     private List<JsExpression> translateArguments() {
         List<JsExpression> result = new ArrayList<JsExpression>();
+        List<JsExpression> argsBeforeVararg = null;
         for (ValueParameterDescriptor parameterDescriptor : resolvedCall.getResultingDescriptor().getValueParameters()) {
             ResolvedValueArgument actualArgument = resolvedCall.getValueArgumentsByIndex().get(parameterDescriptor.getIndex());
+
+            if (actualArgument instanceof VarargValueArgument) {
+                assert !hasSpreadOperator;
+
+                List<ValueArgument> arguments = actualArgument.getArguments();
+                hasSpreadOperator = arguments.size() == 1 && arguments.get(0).getSpreadElement() != null;
+
+                if (isNativeFunctionCall && hasSpreadOperator) {
+                    assert argsBeforeVararg == null;
+                    argsBeforeVararg = result;
+                    result = new SmartList<JsExpression>();
+                }
+            }
+
             result.addAll(translateSingleArgument(actualArgument, parameterDescriptor));
         }
+
+        if (isNativeFunctionCall && hasSpreadOperator) {
+            assert argsBeforeVararg != null;
+            if (!argsBeforeVararg.isEmpty()) {
+                JsInvocation concatArguments = new JsInvocation(new JsNameRef("concat", new JsArrayLiteral(argsBeforeVararg)), result);
+                result = new SmartList<JsExpression>(concatArguments);
+            }
+
+            if (receiver != null) {
+                cachedReceiver = context().declareTemporary(receiver);
+                result.add(0, cachedReceiver.reference());
+            }
+            else {
+                result.add(0, JsLiteral.NULL);
+            }
+        }
+
         return result;
     }
 
     @Override
     public boolean shouldWrapVarargInArray() {
-        return !isNativeFunctionCall;
+        return !isNativeFunctionCall && !hasSpreadOperator;
     }
 }

js/js.translator/testFiles/expression/function/cases/vararg.kt

@@ -13,5 +13,57 @@ fun testSum(expectedSum : Int, vararg i : Int) : Boolean {
   return (expectedSum == sum)
 }
 
-fun box() = testSize(0) && testSum(0) && testSize(3, 1, 1, 1) && testSum(3, 1, 1, 1) && testSize(6, 1, 1, 1, 2, 3, 4)  &&
-    testSum(30, 10, 20, 0)
+fun testSpreadOperator(vararg args : Int): Boolean {
+  var sum = 0;
+  for (a in args) sum += a
+
+  return testSize(args.size, *args) && testSum(sum, *args)
+}
+
+class Bar(val size: Int, val sum: Int) {
+  fun test(vararg args : Int) = testSize(size, *args) && testSum(sum, *args)
+}
+
+object obj {
+  fun test(size: Int, sum: Int, vararg args: Int) = testSize(size, *args) && testSum(sum, *args)
+}
+
+fun spreadInMethodCall(size: Int, sum: Int, vararg args: Int) = Bar(size, sum).test(*args)
+
+fun spreadInObjectMethodCall(size: Int, sum: Int, vararg args: Int) = obj.test(size, sum, *args)
+
+fun testVarargWithFunLit(vararg args: Int, f: (a: IntArray) -> Boolean): Boolean = f(args)
+
+fun box(): String {
+  if (!testSize(0))
+    return "wrong vararg size when call function without args"
+
+  if (!testSum(0))
+    return "wrong vararg sum (arguments) when call function without args"
+
+  if (!testSize(6, 1, 1, 1, 2, 3, 4))
+    return "wrong vararg size when call function with some args (1)"
+
+  if (!testSum(30, 10, 20, 0))
+    return "wrong vararg sum (arguments) when call function with some args (1)"
+
+  if (!testSpreadOperator(30, 10, 20, 0))
+    return "failed when call function using spread operator"
+
+  if (!Bar(3, 30).test(10, 20, 0))
+    return "failed when call method"
+
+  if (!spreadInMethodCall(2, 3, 1, 2))
+    return "failed when call method using spread operator"
+
+  if (!obj.test(5, 15, 1, 2, 3, 4, 5))
+    return "failed when call method of object"
+
+  if (!spreadInObjectMethodCall(2, 3, 1, 2))
+    return "failed when call method of object using spread operator"
+
+  if (!testVarargWithFunLit(1, 2, 3) { args -> args.size == 3 })
+    return "failed when call function with vararg and fun literal"
+
+  return "OK"
+}

js/js.translator/testFiles/native/cases/vararg.kt

@@ -5,20 +5,85 @@ import js.*
 native
 fun paramCount(vararg a : Int) : Int = js.noImpl
 
-fun count(vararg a : Int) = a.size
+// test spread operator
+fun count(vararg a : Int) = paramCount(*a)
 
-fun box() : Boolean {
-    if (paramCount(1, 2 ,3) != 3) {
-        return false;
-    }
-    if (paramCount() != 0) {
-        return false;
-    }
-    if (count() != 0) {
-        return false;
-    }
-    if (count(1, 1, 1, 1) != 4) {
-        return false;
-    }
-    return true;
+native
+class Bar(val size: Int, order: Int = 0) {
+  fun test(order: Int, dummy: Int, vararg args: Int): Boolean = js.noImpl
+  class object {
+    fun startNewTest(): Boolean = js.noImpl
+    var hasOrderProblem: Boolean = false
+  }
+}
+
+native
+object obj {
+  fun test(size: Int, vararg args: Int): Boolean = js.noImpl
+}
+
+fun spreadInMethodCall(size: Int, vararg args: Int) = Bar(size).test(0, 1, *args)
+
+fun spreadInObjectMethodCall(size: Int, vararg args: Int) = obj.test(size, *args)
+
+native
+fun testNativeVarargWithFunLit(vararg args: Int, f: (a: IntArray) -> Boolean): Boolean = js.noImpl
+
+fun testSpreadOperatorWithSafeCall(a: Bar?, expected: Boolean?, vararg args: Int): Boolean {
+  return a?.test(0, 1, *args) == expected
+}
+
+fun testSpreadOperatorWithSureCall(a: Bar?, vararg args: Int): Boolean {
+  return a!!.test(0, 1, *args)
+}
+
+fun testCallOrder(vararg args: Int) =
+    Bar.startNewTest() &&
+    Bar(args.size, 0).test(1, 1, *args) && Bar(args.size, 2).test(3, 1, *args) &&
+    !Bar.hasOrderProblem
+
+fun box(): String {
+  if (paramCount() != 0)
+    return "failed when call native function without args"
+
+  if (paramCount(1, 2 ,3) != 3)
+    return "failed when call native function with some args"
+
+  if (count() != 0)
+    return "failed when call native function without args using spread operator"
+
+  if (count(1, 1, 1, 1) != 4)
+    return "failed when call native function with some args using spread operator"
+
+  if (!Bar(5).test(0, 1, 1, 2, 3, 4, 5))
+    return "failed when call method with some args"
+
+  if (!spreadInMethodCall(2, 1, 2))
+    return "failed when call method using spread operator"
+
+  if (!(obj.test(5, 1, 2, 3, 4, 5)))
+    return "failed when call method of object"
+
+  if (!(spreadInObjectMethodCall(2, 1, 2)))
+    return "failed when call method of object using spread operator"
+
+  if (!(testNativeVarargWithFunLit(1, 2, 3) { args -> args.size == 3 }))
+    return "failed when call native function with vararg and fun literal"
+
+  if (!(testSpreadOperatorWithSafeCall(null, null)))
+    return "failed when test spread operator with SafeCall (?.) using null receiver"
+
+  if (!(testSpreadOperatorWithSafeCall(Bar(3), true, 1, 2, 3)))
+    return "failed when test spread operator with SafeCall (?.)"
+
+  if (!(testSpreadOperatorWithSureCall(Bar(3), 1, 2, 3)))
+    return "failed when test spread operator with SureCall (!!)"
+
+  if (!(testCallOrder()))
+    return "failed when test calling order when using spread operator without args"
+
+  if (!(testCallOrder(1, 2, 3, 4)))
+    return "failed when test calling order when using spread operator without args"
+
+  return "OK"
 }

js/js.translator/testFiles/native/native/vararg.js

@@ -16,4 +16,40 @@
 
 function paramCount() {
     return arguments.length
+}
+
+function Bar(size, order) {
+    this.size = size;
+    Bar.checkOrder(order);
+}
+
+Bar.order = 0;
+Bar.hasOrderProblem = false;
+Bar.checkOrder = function (expectedOrder) {
+    var curOrder = Bar.order++;
+    Bar.hasOrderProblem = Bar.hasOrderProblem || curOrder !== expectedOrder;
+};
+
+Bar.startNewTest = function () {
+    Bar.hasOrderProblem = false;
+    Bar.order = 0;
+    return true;
+};
+
+
+Bar.prototype.test = function (order, dummy /*, args */) {
+    Bar.checkOrder(order);
+    return dummy === 1 && (arguments.length - 2) === this.size;
+};
+
+var obj = {
+    test : function (size /*, args */) {
+        return (arguments.length - 1) === size;
+    }
+};
+
+function testNativeVarargWithFunLit(/* args, f */) {
+    var args = Array.prototype.slice.call(arguments, 0, arguments.length - 1);
+    var f = arguments[arguments.length - 1];
+    return typeof f === "function" && f(args);
 }