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

This is the documentation for a snapshot of the develop branch, built from commit 0863267446.

Returns the number of parameters that should be provided when executing the statement.

unsigned
num_params() const noexcept;

this->valid() == true

No-throw guarantee.