[LLVMbugs] [Bug 15969] New: template base class members not accessible without this->

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=15969

            Bug ID: 15969
           Summary: template base class members not accessible without
                    this->
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: wschlanger at gmail.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

The following code compiles perfectly in Visual Studio. Amazingly, both
'clang++' and 'g++' complain about this line:
            a = 1;          // this does not work. why?
There's a chance Visual Studio is wrong and CLANG++/G++ are right.
Note that "this->a = 1;" does work.

--- code follows ---
    template <class ValueType>
    class base_t
    {
    public:
            int a;
    };

    template <class ValueType, class DerivedType = ValueType>
    class derived_t :
            public base_t<ValueType>
    {
    public:
            int foo()
            {
                    a = 1;          // this does not work. why?
                    this->a = 1;    // this works
                    return 0;
            }
    };

    int main(int argc, char *argv[])
    {
            derived_t<int> a;
            a.foo();
            return 0;
    }

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