Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Return a bool pointer if
this is a boolean, else return nullptr
bool* if_bool();
If this->kind() == kind::bool_,
returns a pointer to the underlying boolean. Otherwise, returns nullptr.
The return value is used in both a boolean context and to assign a variable:
if( auto p = jv.if_bool() ) return *p;
Constant.
No-throw guarantee.