Modernize conversion to bool to the explicit bool conversion operator (library wide). This fixes http://llvm.org/bugs/show_bug.cgi?id=12058. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@151088 91177308-0d34-0410-b5e6-96231b3b80d8 
diff --git a/include/system_error b/include/system_error index 971be33..805c646 100644 --- a/include/system_error +++ b/include/system_error 
@@ -451,7 +451,7 @@  string message() const;    _LIBCPP_ALWAYS_INLINE - //explicit + _LIBCPP_EXPLICIT  operator bool() const _NOEXCEPT {return __val_ != 0;}  };   @@ -528,7 +528,7 @@  string message() const;    _LIBCPP_ALWAYS_INLINE - //explicit + _LIBCPP_EXPLICIT  operator bool() const _NOEXCEPT {return __val_ != 0;}  };