...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Return the number of characters that can be held without a reallocation.
std::size_t
capacity() const noexcept;
This number represents the largest number of characters the currently allocated
storage can contain. This number may be larger than the value returned
by size()
.
Constant.