forked from boostorg/beast
C++14 or later is required to support completion tokens that use per-operation return type deduction. For C++11, a completion token's async_result specialisation must still provide the nested typedef `return_type`.
C++14 or later is required to support completion tokens that use per-operation return type deduction. For C++11, a completion token's async_result specialisation must still provide the nested typedef `return_type`.