Specificity by receiver fixed. Test updated

idea/src/org/jetbrains/jet/lang/resolve/calls/OverloadingConflictResolver.java

@@ -59,6 +59,12 @@ import java.util.Set;
         if (overrides(f, g)) return true;
         if (overrides(g, f)) return false;
 
+        JetType receiverTypeOfF = f.getReceiverType();
+        JetType receiverTypeOfG = g.getReceiverType();
+        if (receiverTypeOfF != null && receiverTypeOfG != null) {
+            if (!typeMoreSpecific(receiverTypeOfF, receiverTypeOfG)) return false;
+        }
+
         List<ValueParameterDescriptor> fParams = f.getValueParameters();
         List<ValueParameterDescriptor> gParams = g.getValueParameters();
 
@@ -68,9 +74,7 @@ import java.util.Set;
             JetType fParamType = fParams.get(i).getOutType();
             JetType gParamType = gParams.get(i).getOutType();
 
-            if (!semanticServices.getTypeChecker().isSubtypeOf(fParamType, gParamType)
-                    && !numericTypeMoreSpecific(fParamType, gParamType)
-                    ) {
+            if (!typeMoreSpecific(fParamType, gParamType)) {
                 return false;
             }
         }
@@ -92,6 +96,11 @@ import java.util.Set;
         return !f.getOriginal().getTypeParameters().isEmpty();
     }
 
+    private boolean typeMoreSpecific(@NotNull JetType specific, @NotNull JetType general) {
+        return semanticServices.getTypeChecker().isSubtypeOf(specific, general) ||
+                            numericTypeMoreSpecific(specific, general);
+    }
+
     private boolean numericTypeMoreSpecific(@NotNull JetType specific, @NotNull JetType general) {
         JetStandardLibrary standardLibrary = semanticServices.getStandardLibrary();
         JetType _double = standardLibrary.getDoubleType();

idea/testData/checker/ExtensionFunctions.jet

@@ -16,7 +16,7 @@ class A
 fun A.plus(a : Any) {
 
   1.foo()
-  true.foo<error>()</error>
+  true.<error>foo()</error>
 
   1
 }
@@ -57,8 +57,8 @@ namespace null_safety {
 
             command<error>.</error>foo
 
-            command<error>.</error>equals(null)
-            command?.equals(null)
+            command.equals(null)
+            command<warning>?.</warning>equals(null)
             command.equals1(null)
             command<warning>?.</warning>equals1(null)
 

idea/testData/checker/regression/SpecififcityByReceiver.jet

@@ -0,0 +1,9 @@
+fun Any.equals(other : Any?) : Boolean
+
+fun main(args: Array<String>) {
+
+    val command : Any = 1
+
+    command<warning>?.<?warning>equals(null)
+    command.equals(null)
+}