[LLVMbugs] [Bug 11478] New: clang -std=c++0x should report use of (obsolete) typeof keyword

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=11478

             Bug #: 11478
           Summary: clang -std=c++0x should report use of (obsolete)
                    typeof keyword
           Product: clang
           Version: 2.9
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++0x
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: Dave at Yost.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified


clang -std=c++0x should report use of (obsolete) typeof keyword and suggest use
of decltype instead.

Instead clang gives inscrutable error messages.

0 280 Z% cat typeofbug.cpp
template<typename T>
class foo {
  typedef typeof(T() - T()) differenceType;
};
0 281 Z% clang -std=c++0x -c typeofbug.cpp
typeofbug.cpp:3:22: error: expected ')'
  typedef typeof(T() - T()) differenceType;
                     ^
typeofbug.cpp:3:17: note: to match this '('
  typedef typeof(T() - T()) differenceType;
                ^
typeofbug.cpp:3:11: error: C++ requires a type specifier for all declarations
  typedef typeof(T() - T()) differenceType;
  ~~~~~~~ ^
typeofbug.cpp:3:28: error: expected ';' at end of declaration list
  typedef typeof(T() - T()) differenceType;
                           ^
                           ;
3 errors generated.
1 282 Z%

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