#include <Oasis/MatchCast.hpp>

Concept definition

template<typename CheckF, typename TransformerF, typename ArgumentT>
concept Oasis::TransformerAcceptsCheckArg =  requires(TransformerF f, const lambda_argument_type<CheckF>& t) {
    { f(t, nullptr) } -> std::same_as<std::expected<gsl::not_null<std::unique_ptr<ArgumentT>>, std::string_view>>;
} && std::predicate<CheckF, const lambda_argument_type<CheckF>&>