JS backend: make MutableMap.set as function intrinsic.

Fixed test WebDemoExamples2Test#builder.

js/js.libraries/src/core/javautil.kt

@@ -2,6 +2,10 @@ package java.util
 
 import java.lang.*
 
+/** Provides [] access to maps */
+native
+public fun <K, V> MutableMap<K, V>.set(key: K, value: V): Unit = noImpl
+
 library("collectionsMax")
 public fun max<T>(col : Collection<T>, comp : Comparator<T>) : T = js.noImpl
 

js/js.libraries/src/stdlib/JUMapsCode.kt

@@ -2,11 +2,6 @@ package kotlin
 
 import java.util.HashMap
 
-/** Provides [] access to maps */
-public fun <K, V> MutableMap<K, V>.set(key : K, value : V): Unit {
-    this.put(key, value)
-}
-
 /**
  * Returns a new [[HashMap]] populated with the given pairs where the first value in each pair
  * is the key and the second value is the value

js/js.tests/test/org/jetbrains/k2js/test/semantics/WebDemoExamples2Test.java

@@ -33,9 +33,7 @@ public final class WebDemoExamples2Test extends SingleFileTranslationTest {
         performTestWithMain("life", "", "2");
     }
 
-    //TODO: fails because it need code from stdlib
-    @SuppressWarnings("UnusedDeclaration")
-    public void _testBuilder() throws Exception {
+    public void testBuilder() throws Exception {
         performTestWithMain("builder", "");
         performTestWithMain("builder", "1", "over9000");
     }

js/js.translator/src/org/jetbrains/k2js/translate/intrinsic/functions/factories/TopLevelFIF.java

@@ -17,6 +17,7 @@
 package org.jetbrains.k2js.translate.intrinsic.functions.factories;
 
 import com.google.dart.compiler.backend.js.ast.JsExpression;
+import com.google.dart.compiler.backend.js.ast.JsInvocation;
 import com.google.dart.compiler.backend.js.ast.JsNameRef;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -25,6 +26,7 @@ import org.jetbrains.k2js.translate.intrinsic.functions.basic.BuiltInFunctionInt
 import org.jetbrains.k2js.translate.intrinsic.functions.basic.CallStandardMethodIntrinsic;
 import org.jetbrains.k2js.translate.intrinsic.functions.basic.FunctionIntrinsic;
 import org.jetbrains.k2js.translate.intrinsic.functions.patterns.NamePredicate;
+import org.jetbrains.k2js.translate.intrinsic.functions.patterns.PatternBuilder;
 
 import java.util.List;
 
@@ -56,5 +58,15 @@ public final class TopLevelFIF extends CompositeFIF {
         add(pattern("String|Boolean|Char|Number.equals"), EQUALS);
         add(pattern("arrayOfNulls"), new CallStandardMethodIntrinsic(new JsNameRef("nullArray", "Kotlin"), false, 1));
         add(pattern("iterator"), RETURN_RECEIVER_INTRINSIC);
+
+        add(PatternBuilder.create("java", "util", "set").receiverParameterExists(true), new FunctionIntrinsic() {
+            @NotNull
+            @Override
+            public JsExpression apply(
+                    @Nullable JsExpression receiver, @NotNull List<JsExpression> arguments, @NotNull TranslationContext context
+            ) {
+                return new JsInvocation(new JsNameRef("put", receiver), arguments);
+            }
+        });
     }
 }

js/js.translator/src/org/jetbrains/k2js/translate/intrinsic/functions/patterns/PatternBuilder.java

@@ -123,32 +123,47 @@ public final class PatternBuilder {
     }
 
     @NotNull
-    public static DescriptorPredicate create(@NotNull final String... names) {
-        return new DescriptorPredicate() {
-            @Override
-            public boolean apply(@Nullable FunctionDescriptor functionDescriptor) {
-                if (functionDescriptor == null) {
-                    return false;
-                }
-
-                DeclarationDescriptor descriptor = functionDescriptor;
-                int nameIndex = names.length - 1;
-                do {
-                    if (!descriptor.getName().asString().equals(names[nameIndex--])) {
-                        return false;
-                    }
-                    descriptor = descriptor.getContainingDeclaration();
-                    if (nameIndex == -1) {
-                        return isRootNamespace(descriptor);
-                    }
-                }
-                while (descriptor != null && !isRootNamespace(descriptor));
-                return false;
-            }
-        };
+    public static DescriptorPredicateImpl create(@NotNull String... names) {
+        return new DescriptorPredicateImpl(names);
     }
 
     private static boolean isRootNamespace(DeclarationDescriptor declarationDescriptor) {
         return declarationDescriptor instanceof NamespaceDescriptor && DescriptorUtils.isRootNamespace((NamespaceDescriptor) declarationDescriptor);
     }
+
+    public static class DescriptorPredicateImpl implements DescriptorPredicate {
+        private final String[] names;
+
+        private boolean receiverParameterExists;
+
+        public DescriptorPredicateImpl(String... names) {
+            this.names = names;
+        }
+
+        public DescriptorPredicateImpl receiverParameterExists(boolean receiverParameterExists) {
+            this.receiverParameterExists = receiverParameterExists;
+            return this;
+        }
+
+        @Override
+        public boolean apply(@Nullable FunctionDescriptor functionDescriptor) {
+            if (functionDescriptor == null || (functionDescriptor.getReceiverParameter() == null) == receiverParameterExists) {
+                return false;
+            }
+
+            DeclarationDescriptor descriptor = functionDescriptor;
+            int nameIndex = names.length - 1;
+            do {
+                if (!descriptor.getName().asString().equals(names[nameIndex--])) {
+                    return false;
+                }
+                descriptor = descriptor.getContainingDeclaration();
+                if (nameIndex == -1) {
+                    return isRootNamespace(descriptor);
+                }
+            }
+            while (descriptor != null && !isRootNamespace(descriptor));
+            return false;
+        }
+    }
 }