[groovy] skip parenthesis (EA-58298)

plugins/groovy/groovy-psi/src/org/jetbrains/plugins/groovy/lang/psi/dataFlow/types/TypeInferenceHelper.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2015 JetBrains s.r.o.
+ * Copyright 2000-2016 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -52,6 +52,8 @@ import org.jetbrains.plugins.groovy.lang.psi.impl.statements.expressions.TypesUt
 import java.util.*;
 import java.util.concurrent.atomic.AtomicReference;
 
+import static org.jetbrains.plugins.groovy.lang.psi.util.PsiUtil.skipParentheses;
+
 /**
  * @author ven
  */
@@ -169,7 +171,7 @@ public class TypeInferenceHelper {
 
   @Nullable
   public static PsiType getInitializerTypeFor(PsiElement element) {
-    final PsiElement parent = element.getParent();
+    final PsiElement parent = skipParentheses(element.getParent(), true);
     if (parent instanceof GrAssignmentExpression) {
       if (element instanceof GrIndexProperty) {
         final GrExpression rvalue = ((GrAssignmentExpression)parent).getRValue();

plugins/groovy/groovy-psi/src/org/jetbrains/plugins/groovy/lang/resolve/processors/SubstitutorComputer.java

@@ -96,12 +96,12 @@ public class SubstitutorComputer {
       }
     }
     else if (parent instanceof GrAssignmentExpression && myPlaceToInferContext.equals(((GrAssignmentExpression)parent).getRValue())) {
-      GrExpression lValue = ((GrAssignmentExpression)parent).getLValue();
-      if (lValue instanceof GrIndexProperty) {
-        return null;
+      PsiElement lValue = PsiUtil.skipParentheses(((GrAssignmentExpression)parent).getLValue(), false);
+      if ((lValue instanceof GrExpression) && !(lValue instanceof GrIndexProperty)) {
+        return ((GrExpression)lValue).getType();
       }
       else {
-        return lValue.getType();
+        return null;
       }
     }
     else if (parent instanceof GrVariable) {

plugins/groovy/test/org/jetbrains/plugins/groovy/lang/highlighting/GroovyHighlightingTest.groovy

@@ -1987,6 +1987,21 @@ class Main {
         println "Works: $x = $t"
     }
 }
+'''
+    testHighlighting '''
+class Main {
+
+    static <T> T foo() {}
+
+    static void main(String[] args) {
+        def main = new Main()
+        (main[Main]) = foo()
+    }
+
+    def putAt(x, String t) {
+        println "Works: $x = $t"
+    }
+}
 '''
   }
 }