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
Returns whether the collection contains any resultset.
bool empty() const;
This function is provided for compatibility with standard collections,
and always returns false, since any valid results
contains at least one resultset.
this->has_value()
== true
No-throw guarantee.
Constant.