is_debug_env.h

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#pragma once
 
#include "di/execution/query/forwarding_query.h"
#include "di/function/invoke.h"
#include "di/meta/constexpr.h"
 
namespace di::execution {
namespace is_debug_env_ns {
    struct Function : ForwardingQuery {
        template<typename Env>
        constexpr auto operator()(Env const& env) const {
            if constexpr (concepts::TagInvocable<Function, Env const&>) {
                static_assert(concepts::ConstexprOf<meta::TagInvokeResult<Function, Env const&>, bool>,
                              "is_debug_env() customizations must return a di::Constexpr<bool> instance.");
                return tag_invoke(*this, env);
            } else {
                return c_<false>;
            }
        }
    };
}

constexpr inline auto is_debug_env = is_debug_env_ns::Function {};
}
 
namespace di::concepts {
template<typename Env>
concept DebugEnv = meta::InvokeResult<decltype(execution::is_debug_env), Env const&>::value;
}