[Bug c++/80151] Add a warning to catch implicit string to bool conversion (-Wstring-conversion)

[egallager at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80151

Eric Gallager <egallager at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |diagnostic
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2017-08-23
                 CC|                            |egallager at gcc dot gnu.org
     Ever confirmed|0                           |1
           Severity|normal                      |enhancement

--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
Confirming as an enhancement. After adding a missing semicolon to get it to
compile, there's only a warning from -Wunused-but-set-variable:

$ /usr/local/bin/g++ -c -Wall -Wextra -pedantic -Wwrite-strings -Wconversion
-Wsign-conversion 80151.cc
80151.cc: In function ‘int main()’:
80151.cc:3:7: warning: variable ‘b’ set but not used
[-Wunused-but-set-variable]
  bool b;
       ^
$