C++: Recognize C++11 nullptr

Change-Id: I5b7ac8f9b2137ffe9439ada4ec4aeb9cee8e249d
Reviewed-by: Roberto Raggi <roberto.raggi@nokia.com>

src/libs/cplusplus/FindUsages.cpp

@@ -1351,6 +1351,13 @@ bool FindUsages::visit(SizeofExpressionAST *ast)
     return false;
 }
 
+bool FindUsages::visit(PointerLiteralAST *ast)
+{
+    (void) ast;
+    // unsigned literal_token = ast->literal_token;
+    return false;
+}
+
 bool FindUsages::visit(NumericLiteralAST *ast)
 {
     (void) ast;

src/libs/cplusplus/FindUsages.h

@@ -202,6 +202,7 @@ protected:
     virtual bool visit(TypenameCallExpressionAST *ast);
     virtual bool visit(TypeConstructorCallAST *ast);
     virtual bool visit(SizeofExpressionAST *ast);
+    virtual bool visit(PointerLiteralAST *ast);
     virtual bool visit(NumericLiteralAST *ast);
     virtual bool visit(BoolLiteralAST *ast);
     virtual bool visit(ThisExpressionAST *ast);

src/libs/cplusplus/ResolveExpression.cpp

@@ -273,6 +273,13 @@ bool ResolveExpression::visit(SizeofExpressionAST *)
     return false;
 }
 
+bool ResolveExpression::visit(PointerLiteralAST *)
+{
+    FullySpecifiedType ty(control()->integerType(IntegerType::Int)); // Handling as Int.
+    addResult(ty, _scope);
+    return false;
+}
+
 bool ResolveExpression::visit(NumericLiteralAST *ast)
 {
     const Token &tk = tokenAt(ast->literal_token);

src/libs/cplusplus/ResolveExpression.h

@@ -91,6 +91,7 @@ protected:
     virtual bool visit(TypenameCallExpressionAST *ast);
     virtual bool visit(TypeConstructorCallAST *ast);
     virtual bool visit(SizeofExpressionAST *ast);
+    virtual bool visit(PointerLiteralAST *ast);
     virtual bool visit(NumericLiteralAST *ast);
     virtual bool visit(BoolLiteralAST *ast);
     virtual bool visit(ThisExpressionAST *ast);