...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Conversion.
operator param() const;
This function performs a conversion from a reference-like query parameter to one retaining ownership of the strings by making a copy.
Linear in this->key.size() + this->value.size()
.
Calls to allocate may throw.