[LLVMbugs] [Bug 12350] New: problem with explicitely calling class destructor if full qualified class name is used

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=12350

             Bug #: 12350
           Summary: problem with explicitely calling class destructor if
                    full qualified class name is used
           Product: clang
           Version: trunk
          Platform: Macintosh
        OS/Version: MacOS X
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: dmarkman at mac.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Consider the following code:


#include <iostream>
#include <string>

int main(int argc, const char * argv[])
{
    char data[ sizeof(std::string) ];

    new (data) std::string("Hello World!");
    std::string *str = reinterpret_cast<std::string *>(data);
    std::cout << *str << std::endl;
    str->std::string::~string();//clang failure
    return 0;
}

with Xcode 4.3.2 on Lion 10.7.3

g++ ((GCC) 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.9.00))
does compile it, but clang++ (clang version 3.1 (trunk 153412))
from the trunk (just built it today)reports an error

main.cpp:11:24: error: expected the class name after '~' to name a destructor
    str->std::string::~string();//clang failure

Note:
workarounds are easy
1. using typedef
    typedef std::string my_string;
    str->~my_string();
    BTW: clang doesn't like
    str->my_string::~my_string();
    but g++ is OK.
2. using keyword "using"
      using std::string;
      str->~string();
3. using template function
template<typename T>
inline void destroy(T *t) {
    t->T::~T();
}
.....
destroy(str);

bottom line: it looks like if I use namespace in the class name clang isn't
happy

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