categories.hxx

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/*
 * Copyright (C) 2024-2026 David C. Manuelda (StormBytePP)
 *
 * This file is part of StormByte.
 *
 * StormByte is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * or later, as published by the Free Software Foundation.
 *
 * StormByte is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with StormByte. If not, see
 * <https://www.gnu.org/licenses/lgpl-3.0.html>.
 */
 
#pragma once
 
// NullablePointer uses ExplicitlyConvertibleTo: must come after conversions.hxx.
#include <StormByte/type_traits/conversions.hxx>
 
#include <type_traits>
 
namespace StormByte {
    namespace Type {
        template<typename T>
        concept Reference = std::is_reference_v<T>;
 
        template<typename T>
        concept LvalueReference = std::is_lvalue_reference_v<T>;
 
        template<typename T>
        concept RvalueReference = std::is_rvalue_reference_v<T>;
 
        template<typename T>
        concept Pointer = std::is_pointer_v<T>;
 
        template<typename T>
        concept SmartPointer =
            !Pointer<std::remove_cvref_t<T>> &&
            requires(std::remove_cvref_t<T> const& p) {
                { *p };
                { p.operator->() };
                { p.get() };
            };
 
        template<typename T>
        concept NullablePointer =
            SmartPointer<T> &&
            ExplicitlyConvertibleTo<std::remove_cvref_t<T>, bool>;
 
        template<typename T>
        concept Integral = std::is_integral_v<T>;
 
        template<typename T>
        concept FloatingPoint = std::is_floating_point_v<T>;
 
        template<typename T>
        concept Arithmetic = Integral<T> || FloatingPoint<T>;
 
        template<typename T>
        concept Signed = std::is_signed_v<T>;
 
        template<typename T>
        concept Unsigned = std::is_unsigned_v<T>;
 
        template<typename T>
        concept Const = std::is_const_v<T>;
 
        template<typename T>
        concept Class = std::is_class_v<T>;
    }
}