[LLVMbugs] [Bug 7113] New: Clang should warn on absurd implicit conversions to NULL

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=7113

           Summary: Clang should warn on absurd implicit conversions to
                    NULL
           Product: clang
           Version: unspecified
          Platform: PC
        OS/Version: All
            Status: NEW
          Keywords: quality-of-implementation
          Severity: normal
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: chandlerc at gmail.com
                CC: llvmbugs at cs.uiuc.edu, dgregor at apple.com


Because the programmer never in a million years wanted this to happen:

% cat t6.cc
#include <string>
std::string f() { return false; }

% ./bin/clang++ -fsyntax-only t6.cc
%

It seems reasonable to print a warning for false -> (char *)0, at least in C++
where converting implicitly to NULL can have such surprising side-effects.

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