std::inplace_vector<T,N>::try_emplace_back

Since C++26

Conditionally appends an object of type T to the end of the container.

# Declarations

template< class... Args >
constexpr pointer try_emplace_back( Args&&... args );

(since C++26)

# Parameters

# Return value

std::addressof(back()) if size() < capacity(), nullptr otherwise.

# Notes

This section is incompleteReason: Explain the purpose of this API.

# Example

#include <cassert>
#include <complex>
#include <inplace_vector>
 
int main()
{
    using namespace std::complex_literals;
    using C = std::complex<double>;
    using I = std::inplace_vector<C, 3>;
    auto v = I{1.0 + 2.0i, 3.0 + 4.0i};
 
    C* c = v.try_emplace_back(5.0, 6.0);
    assert(*c == 5.0 + 6.0i);
    assert((v == I{1.0 + 2.0i, 3.0 + 4.0i, 5.0 + 6.0i}));
 
    c = v.try_emplace_back(7.0, 8.0); // no space => no insertion
    assert(c == nullptr);
    assert((v == I{1.0 + 2.0i, 3.0 + 4.0i, 5.0 + 6.0i}));
}

# See also