refactoring: added hasOnlyErrorsFromPosition(ConstraintPosition)

to use it for errors from completer as well

compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/CallResolverUtil.java

@@ -28,6 +28,7 @@ import org.jetbrains.jet.lang.resolve.BindingContext;
 import org.jetbrains.jet.lang.resolve.TraceUtil;
 import org.jetbrains.jet.lang.resolve.calls.context.BasicCallResolutionContext;
 import org.jetbrains.jet.lang.resolve.calls.context.CallResolutionContext;
+import org.jetbrains.jet.lang.resolve.calls.inference.ConstraintPosition;
 import org.jetbrains.jet.lang.resolve.calls.inference.ConstraintSystem;
 import org.jetbrains.jet.lang.resolve.calls.model.ResolvedCallImpl;
 import org.jetbrains.jet.lang.resolve.calls.model.ResolvedCallWithTrace;
@@ -128,7 +129,7 @@ public class CallResolverUtil {
 
         // Expected type mismatch was reported before as 'TYPE_INFERENCE_EXPECTED_TYPE_MISMATCH'
         ConstraintSystem constraintSystem = callToComplete.getConstraintSystem();
-        if (constraintSystem != null && constraintSystem.getStatus().hasOnlyExpectedTypeMismatch()) return false;
+        if (constraintSystem != null && constraintSystem.getStatus().hasOnlyErrorsFromPosition(ConstraintPosition.EXPECTED_TYPE_POSITION)) return false;
         return true;
     }
 

compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/CandidateResolver.java

@@ -270,14 +270,13 @@ public class CandidateResolver {
                 BindingContext.CONSTRAINT_SYSTEM_COMPLETER, context.call.getCalleeExpression());
         if (constraintSystemCompleter == null) return;
 
-        ConstraintSystemImpl backup = (ConstraintSystemImpl) constraintSystem.copy();
+        ConstraintSystem copy = constraintSystem.copy();
+
+        constraintSystemCompleter.completeConstraintSystem(copy, resolvedCall);
 
         //todo improve error reporting with errors in constraints from completer
-        constraintSystemCompleter.completeConstraintSystem(constraintSystem, resolvedCall);
+        if (!copy.getStatus().hasOnlyErrorsFromPosition(ConstraintPosition.FROM_COMPLETER)) {
-        if (constraintSystem.getStatus().hasTypeConstructorMismatchAt(ConstraintPosition.FROM_COMPLETER) ||
+            resolvedCall.setConstraintSystem(copy);
-            (constraintSystem.getStatus().hasContradiction() && !backup.getStatus().hasContradiction())) {
-
-            resolvedCall.setConstraintSystem(backup);
         }
     }
 
@@ -295,8 +294,7 @@ public class CandidateResolver {
 
             copy.addSupertypeConstraint(KotlinBuiltIns.getInstance().getUnitType(), returnType, ConstraintPosition.EXPECTED_TYPE_POSITION);
             if (copy.getStatus().isSuccessful()) {
-                constraintSystem = copy;
+                resolvedCall.setConstraintSystem(copy);
-                resolvedCall.setConstraintSystem(constraintSystem);
             }
         }
     }

compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/tasks/TracingStrategyImpl.java

@@ -220,7 +220,7 @@ public class TracingStrategyImpl implements TracingStrategy {
             // (it's useful, when the arguments, e.g. lambdas or calls are incomplete)
             return;
         }
-        if (status.hasOnlyExpectedTypeMismatch()) {
+        if (status.hasOnlyErrorsFromPosition(ConstraintPosition.EXPECTED_TYPE_POSITION)) {
             JetType declaredReturnType = data.descriptor.getReturnType();
             if (declaredReturnType == null) return;
 

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

@@ -32,6 +32,7 @@ import org.jetbrains.jet.lang.resolve.BindingContextUtils;
 import org.jetbrains.jet.lang.resolve.BindingTrace;
 import org.jetbrains.jet.lang.resolve.calls.CallResolver;
 import org.jetbrains.jet.lang.resolve.calls.autocasts.DataFlowInfo;
+import org.jetbrains.jet.lang.resolve.calls.inference.ConstraintPosition;
 import org.jetbrains.jet.lang.resolve.calls.inference.ConstraintSystem;
 import org.jetbrains.jet.lang.resolve.calls.inference.ConstraintSystemStatus;
 import org.jetbrains.jet.lang.resolve.calls.inference.InferenceErrorData;
@@ -344,7 +345,7 @@ public class ControlStructureTypingUtils {
                 if (status.hasErrorInConstrainingTypes()) {
                     return;
                 }
-                if (status.hasOnlyExpectedTypeMismatch() || status.hasConflictingConstraints()) {
+                if (status.hasOnlyErrorsFromPosition(ConstraintPosition.EXPECTED_TYPE_POSITION) || status.hasConflictingConstraints()) {
                     JetExpression expression = call.getCalleeExpression();
                     if (expression != null) {
                         expression.accept(checkTypeVisitor, new CheckTypeContext(trace, data.expectedType));

compiler/testData/diagnostics/tests/delegatedProperty/inference/extensionProperty.kt

@@ -4,6 +4,8 @@ open class A {
     val B.w: Int by <!TYPE_INFERENCE_UPPER_BOUND_VIOLATED!>MyProperty<!>()
 }
 
+val B.r: Int by <!TYPE_INFERENCE_UPPER_BOUND_VIOLATED!>MyProperty<!>()
+
 val A.e: Int by MyProperty()
 
 class B {

core/descriptors/src/org/jetbrains/jet/lang/resolve/calls/inference/ConstraintSystemImpl.java

@@ -106,15 +106,14 @@ public class ConstraintSystemImpl implements ConstraintSystem {
         }
 
         @Override
-        public boolean hasOnlyExpectedTypeMismatch() {
+        public boolean hasOnlyErrorsFromPosition(ConstraintPosition constraintPosition) {
             if (isSuccessful()) return false;
-            ConstraintSystem systemWithoutExpectedTypeConstraint = filterConstraintsOut(EXPECTED_TYPE_POSITION);
+            ConstraintSystem systemWithoutConstraintsFromPosition = filterConstraintsOut(constraintPosition);
-            if (systemWithoutExpectedTypeConstraint.getStatus().isSuccessful()) {
+            if (systemWithoutConstraintsFromPosition.getStatus().isSuccessful()) {
                 return true;
             }
-            if (errorConstraintPositions.size() == 1 && errorConstraintPositions.contains(EXPECTED_TYPE_POSITION)) {
+            if (errorConstraintPositions.size() == 1 && errorConstraintPositions.contains(constraintPosition)) {
-                // if systemWithoutExpectedTypeConstraint has unknown type parameters, it's not successful,
+                // e.g. if systemWithoutConstraintsFromPosition has unknown type parameters, it's not successful
-                // but there can be expected type mismatch after expected type is added
                 return true;
             }
             return false;

core/descriptors/src/org/jetbrains/jet/lang/resolve/calls/inference/ConstraintSystemStatus.java

@@ -79,9 +79,10 @@ public interface ConstraintSystemStatus {
     boolean hasTypeConstructorMismatchAt(@NotNull ConstraintPosition constraintPosition);
 
     /**
-     * Returns <tt>true</tt> if there is type constructor mismatch only in {@link ConstraintPosition.EXPECTED_TYPE_POSITION}.
+     * Returns <tt>true</tt> if there is type constructor mismatch only in constraintPosition or
+     * constraint system is successful without constraints from this position.
      */
-    boolean hasOnlyExpectedTypeMismatch();
+    boolean hasOnlyErrorsFromPosition(ConstraintPosition constraintPosition);
 
     /**
      * Returns <tt>true</tt> if there is an error in constraining types. <p/>