Create a new non-modifiable buffer that represents the given string.

template<
    typename Elem,
    typename Traits>
const_buffer buffer(
    basic_string_view< Elem, Traits > data,
    std::size_t max_size_in_bytes);

Return Value

A mutable_buffer value equivalent to:

mutable_buffer(
   data.size() ? &data[0] : 0,
   min(data.size() * sizeof(Elem), max_size_in_bytes));