bbm::concepts::lossfunction Concept Reference

loss function concept More...

#include <lossfunction.h>

Concept definition

template<typename LOSSFUNC>
concept bbm::concepts::lossfunction =  requires(std::decay_t<LOSSFUNC>& func)
    {
      requires concepts::has_config<LOSSFUNC>;
      { func.update() };
      { std::as_const(func)() } -> std::same_as<Value_t<LOSSFUNC>>;
      { std::as_const(func)(std::declval<typename std::decay_t<Mask_t<LOSSFUNC>>>()) } -> std::same_as<Value_t<LOSSFUNC>>;
    }

Detailed Description

loss function concept

Each loss function requires:

• concepts::has_config
• update(void) method that initializes the loss. This method should be called at the beginning of each optimization step()
• Value_t operator()(Mask=true) const method that returns the loss.
• The returned loss should support addition.