C++: Split designator AST

Change-Id: I9bfed2023624c818c0f35f24476693cffeaf2bbc
Reviewed-by: Wang Hoi <wanghoi@126.com>
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

src/libs/3rdparty/cplusplus/ASTPatternBuilder.h

@@ -1147,9 +1147,16 @@ public:
         return __ast;
     }
 
-    DesignatorAST *Designator()
+    DotDesignatorAST *DotDesignator()
     {
-        DesignatorAST *__ast = new (&pool) DesignatorAST;
+        DotDesignatorAST *__ast = new (&pool) DotDesignatorAST;
+        return __ast;
+    }
+
+    BracketDesignatorAST *BracketDesignator(ExpressionAST *expression = 0)
+    {
+        BracketDesignatorAST *__ast = new (&pool) BracketDesignatorAST;
+        __ast->expression = expression;
         return __ast;
     }