[#E9091180648EAE5063F70DE80AC5A887C78A4AD0]
Append params
iterator append(std::initializer_listinit);
This function appends the params in an initializer-list to the view.
The `end()` iterator is invalidated.
url u;
u.encoded_params().append({ {"first", "John"}, {"last", "Doe"} });
Linear in `this->url().encoded_query().size()`.
Strong guarantee. Calls to allocate may throw. Exceptions thrown on invalid input.