Constructor descriptors are visible through BindingContext API

idea/src/org/jetbrains/jet/lang/resolve/BindingContext.java

@@ -12,6 +12,7 @@ public interface BindingContext {
     ClassDescriptor getClassDescriptor(JetClass declaration);
     TypeParameterDescriptor getTypeParameterDescriptor(JetTypeParameter declaration);
     FunctionDescriptor getFunctionDescriptor(JetFunction declaration);
+    ConstructorDescriptor getConstructorDescriptor(JetElement declaration);
     VariableDescriptor getVariableDescriptor(JetProperty declaration);
     VariableDescriptor getParameterDescriptor(JetParameter declaration);
 

idea/src/org/jetbrains/jet/lang/resolve/BindingTraceContext.java

@@ -2,6 +2,7 @@ package org.jetbrains.jet.lang.resolve;
 
 import com.intellij.psi.PsiElement;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 import org.jetbrains.jet.lang.psi.*;
 import org.jetbrains.jet.lang.types.*;
 
@@ -137,6 +138,12 @@ public class BindingTraceContext implements BindingContext, BindingTrace {
         return expressionTypes.get(expression);
     }
 
+    @Nullable
+    @Override
+    public ConstructorDescriptor getConstructorDescriptor(@NotNull JetElement declaration) {
+        return constructorDeclarationsToDescriptors.get(declaration);
+    }
+
     @Override
     public DeclarationDescriptor resolveReferenceExpression(JetReferenceExpression referenceExpression) {
         return resolutionResults.get(referenceExpression);