Issue 13241. Report StaticWarningCode.CONFLICTING_INSTANCE_METHOD_SETTER.

editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/verifier/ErrorVerifier.java

Index: editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/verifier/ErrorVerifier.java
diff --git a/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/verifier/ErrorVerifier.java b/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/verifier/ErrorVerifier.java
index 2610ff3a79837bb12abc1341896fcc5712a5ffcc..7d3ba329684240b43a16c73b72e76fd8c8e63316 100644
--- a/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/verifier/ErrorVerifier.java
+++ b/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/verifier/ErrorVerifier.java
@@ -814,6 +814,8 @@ public class ErrorVerifier extends RecursiveASTVisitor<Void> {
         checkForOptionalParameterInOperator(node);
         checkForWrongNumberOfParametersForOperator(node);
         checkForNonVoidReturnTypeForOperator(node);
+      } else {
+        checkForConflictingInstanceMethodSetter(node);
       }
       checkForConcreteClassWithAbstractMember(node);
       checkForAllInvalidOverrideErrorCodes(node);
@@ -2262,6 +2264,43 @@ public class ErrorVerifier extends RecursiveASTVisitor<Void> {
   }
 
   /**
+   * This verifies that the enclosing class does not have a setter with the same name as the passed
+   * instance method declaration.
+   * 
+   * @param node the method declaration to evaluate
+   * @return {@code true} if and only if an error code is generated on the passed node
+   * @see StaticWarningCode#CONFLICTING_INSTANCE_METHOD_SETTER
+   */
+  private boolean checkForConflictingInstanceMethodSetter(MethodDeclaration node) {
+    if (node.isStatic()) {
+      return false;
+    }
+    // prepare name
+    SimpleIdentifier nameNode = node.getName();
+    if (nameNode == null) {
+      return false;
+    }
+    String name = nameNode.getName();
+    // ensure that we have enclosing class
+    if (enclosingClass == null) {
+      return false;
+    }
+    // try to find setter
+    ExecutableElement setter = inheritanceManager.lookupMember(enclosingClass, name + "=");
+    if (setter == null) {
+      return false;
+    }
+    // report problem
+    errorReporter.reportError(
+        StaticWarningCode.CONFLICTING_INSTANCE_METHOD_SETTER,
+        nameNode,
+        enclosingClass.getDisplayName(),
+        name,
+        setter.getEnclosingElement().getDisplayName());
+    return true;
+  }
+
+  /**
    * This verifies that the enclosing class does not have an instance member with the same name as
    * the passed static getter method declaration.
    *