base_layout.hpp

/*
 * glslstruct - a C++ library designed to easily represent GLSL's Uniform Buffer Objects (UBOs) and Shader Storage Buffer Objects (SSBOs) in C++.
 *
 * Licensed under the BSD 3-Clause License with Attribution Requirement.
 * See the LICENSE file for details: https://github.com/MAIPA01/glslstruct/blob/main/LICENSE
 *
 * Copyright (c) 2025, Patryk Antosik (MAIPA01)
 */
 
#pragma once
#ifndef _GLSL_STRUCT_BASE_LAYOUT_HPP_
    #define _GLSL_STRUCT_BASE_LAYOUT_HPP_
 
    #include <glslstruct/config.hpp>
 
    #if !_GLSL_STRUCT_HAS_CXX17
_GLSL_STRUCT_ERROR("This is only available for c++17 and greater!");
    #else
 
        #include <glslstruct/types.hpp>
 
        #include <glslstruct/layout/traits/layout_traits_concept.hpp>
        #if _GLSL_STRUCT_HAS_TYPES
            #include <glslstruct/type/containers/array_type.hpp>
            #include <glslstruct/type/containers/mat_type.hpp>
            #include <glslstruct/type/containers/scalar_type.hpp>
            #include <glslstruct/type/containers/struct_type.hpp>
            #include <glslstruct/type/containers/vec_type.hpp>
            #include <glslstruct/type/visitors/is_of_type_visitor.hpp>
        #endif
        #include <glslstruct/utils/assert.hpp>
        #include <glslstruct/utils/functions.hpp>
        #include <glslstruct/utils/ValueType.hpp>
        #include <glslstruct/var_data/var_data.hpp>
        #include <glslstruct/variable/glsl_variable.hpp>
 
namespace glslstruct {
    namespace utils {
        /**
         * @brief Context container for layout
         * @ingroup utils
         * @tparam Traits layout traits type
         */
        template<class Traits>
        struct layout_with_context {
            /// @brief context type
            using context_type = _GLSL_STRUCT_TYPENAME17 Traits::context_type;
 
        protected:
            /// @brief context value
            context_type _context;
 
        public:
                /// @brief default constructor
        #if !_GLSL_STRUCT_HAS_CXX20
            template<class C = context_type,
              std::enable_if_t<std::is_default_constructible_v<context_type> && std::is_same_v<C, context_type>, bool> = true>
        #endif
            _GLSL_STRUCT_CONSTEXPR17 layout_with_context() noexcept _GLSL_STRUCT_REQUIRES(
              std::is_default_constructible_v<context_type>
            )
                : _context() {
            }
 
            /// @brief constructor with context value
            _GLSL_STRUCT_CONSTEXPR17 explicit layout_with_context(const context_type& ctx) : _context(ctx) {}
        };
 
        /**
         * @brief empty container for layout
         * @ingroup utils
         */
        struct layout_without_context {};
    } // namespace utils
 
        /**
         * @brief base layout container
         * @ingroup glslstruct
         * @tparam Traits layout traits type
         */
        #if _GLSL_STRUCT_HAS_CXX20
    template<layout_traits Traits>
        #else
    template<class Traits, std::enable_if_t<is_layout_traits_v<Traits>, bool> >
        #endif
    class base_layout : public std::conditional_t<utils::has_layout_traits_context_v<Traits>, utils::layout_with_context<Traits>,
                          utils::layout_without_context> {
    public:
        /// @brief traits type
        using traits_type                                = Traits;
 
        /// @brief value indicating if traits has context defined
        static _GLSL_STRUCT_CONSTEXPR17 bool has_context = utils::has_layout_traits_context_v<traits_type>;
 
    private:
        friend struct std::hash<base_layout>;
 
        /// @brief base layout struct
        using base_struct =
          std::conditional_t<has_context, utils::layout_with_context<traits_type>, utils::layout_without_context>;
 
        /// @brief variables data
        mstd::ordered_map<std::string, var_data> _variables;
        /// @brief current offset
        size_t _currentOffset = 0;
 
        #pragma region VARIABLE_SET
 
        /// @brief sets variable data
        _GLSL_STRUCT_CONSTEXPR17 var_data& _set_variable(const std::string_view name, const size_t offset,
        #if _GLSL_STRUCT_HAS_TYPES
          const base_type_handle& type,
        #else
          const size_t size,
        #endif
          const bool isTopLevel, const size_t padding = 0) {
            return _variables.emplace_back(name.data(), var_data(offset,
        #if _GLSL_STRUCT_HAS_TYPES
                                                          type,
        #else
                                                          size,
        #endif
                                                          isTopLevel, padding));
        }
 
        #pragma endregion
 
        /// @brief calculates alignment offset
        [[nodiscard]] static _GLSL_STRUCT_CONSTEXPR17 size_t _calculate_alignment_offset(const size_t currentOffset,
          const size_t baseAlignment) noexcept {
            // CALCULATE ALIGNMENT
            const size_t alignmentOffset = ceil_to_nearest_multiple(currentOffset, baseAlignment);
 
                // CHECK IF NOT OVERFLOWED
                if (alignmentOffset < currentOffset) {
                    glsl_struct_assert(false, "Data overflow would happen!");
                    return bad_offset();
                }
 
            return alignmentOffset;
        }
 
        /// @brief returns padding value
        [[nodiscard]] static _GLSL_STRUCT_CONSTEXPR17 size_t _calculate_padding(const size_t currentOffset,
          const size_t baseAlignment) noexcept {
            return _calculate_alignment_offset(currentOffset, baseAlignment) - currentOffset;
        }
 
        /// @brief moves current offset to end of variable
        [[nodiscard]] static _GLSL_STRUCT_CONSTEXPR17 bool _move_current_offset(size_t& currentOffset,
          const size_t distance) noexcept {
                if (mstd::add_overflow(currentOffset, distance, currentOffset)) {
                    glsl_struct_assert(false, "Data overflow would happen!");
                    return false;
                }
            return true;
        }
 
        #pragma region COMMON_CHECKS
 
        /// @brief checks if vec length is between 2 and 4
        [[nodiscard]] static _GLSL_STRUCT_CONSTEXPR17 bool _is_vec_length_good(const size_t length) noexcept {
                if (length < 2 || length > 4) {
                    glsl_struct_assert(false, "value should be in range <2, 4>!");
                    return false;
                }
            return true;
        }
 
        /// @brief checks if array count is not zero
        [[nodiscard]] static _GLSL_STRUCT_CONSTEXPR17 bool _is_array_count_good(const size_t count) {
                if (count == 0) {
                    glsl_struct_assert(false, "array count cannot be zero!!");
                    return false;
                }
            return true;
        }
 
        /// @brief checks if struct is not empty
        [[nodiscard]] static _GLSL_STRUCT_CONSTEXPR17 bool _is_struct_not_empty(
          const mstd::ordered_map<std::string, var_data>& values
        ) noexcept {
                if (values.empty()) {
                    glsl_struct_assert(false, "struct cannot be empty!!");
                    return false;
                }
            return true;
        }
 
        #pragma endregion
 
        #pragma region STANDARD_ADD
 
        /// @brief returns alignment offset of variable and moves current offset
        [[nodiscard]] static _GLSL_STRUCT_CONSTEXPR17 size_t _add(size_t& currentOffset, const size_t baseAlignment,
          const size_t baseOffset) noexcept {
            // GET ALIGNMENT OFFSET
            const size_t alignmentOffset = _calculate_alignment_offset(currentOffset, baseAlignment);
 
                if (alignmentOffset == bad_offset()) { return alignmentOffset; }
 
            // CHECK OFFSET BOUNDARIES
            size_t tempOffset = alignmentOffset;
                if (!_move_current_offset(tempOffset, baseOffset)) { return bad_offset(); }
 
            // MOVE CURRENT OFFSET
            currentOffset = tempOffset;
            return alignmentOffset;
        }
 
        /// @brief returns alignment offsets of array variables and moves current offset
        [[nodiscard]] static _GLSL_STRUCT_CONSTEXPR20 std::vector<size_t> _add_array(size_t& currentOffset,
          const size_t arrayBaseAlignment, const size_t elemBaseOffset, const size_t count) noexcept {
            // CALCULATE ARRAY ELEMENTS OFFSETS
            size_t tempOffset = currentOffset;
 
            std::vector<size_t> arrayOffsets;
            arrayOffsets.reserve(count);
                for (size_t i = 0, elemOffset; i < count; ++i) {
                    elemOffset = _add(tempOffset, arrayBaseAlignment, elemBaseOffset);
 
                        if (elemOffset == bad_offset()) { return std::vector<size_t>(); }
 
                    arrayOffsets.push_back(elemOffset);
                }
 
            // MOVE CURRENT OFFSET
            currentOffset = tempOffset;
            return arrayOffsets;
        }
 
        #pragma endregion
 
        #pragma region VARIABLE_ADD
 
        /// @brief sets variable data
        _GLSL_STRUCT_CONSTEXPR17 var_data& _add_variable(
          const std::string_view name, const size_t alignmentOffset, const bool isTopLevel,
        #if _GLSL_STRUCT_HAS_TYPES
          const base_type_handle& type
        #else
          const size_t typeSize
        #endif
        ) {
            // CHECK VARIABLE NAME
            glsl_struct_assert(!contains(name), "Layout already contains value with name {}", name);
 
            // SET VARIABLE
 
            return _set_variable(name, alignmentOffset,
        #if _GLSL_STRUCT_HAS_TYPES
              type,
        #else
              typeSize,
        #endif
              isTopLevel);
        }
 
        /// @brief sets array variables data
        _GLSL_STRUCT_CONSTEXPR17 var_data& _add_array_variable(
          const std::string_view name, const std::vector<size_t>& alignmentOffsets, const bool isTopLevel,
        #if _GLSL_STRUCT_HAS_TYPES
          const base_type_handle& elemType, const base_type_handle& arrayType
        #else
          const size_t elemBaseOffset, const size_t arrayBaseOffset
        #endif
        ) {
        #if _GLSL_STRUCT_HAS_TYPES
            size_t elemSize = elemType->get_size();
        #else
            size_t elemSize = elemBaseOffset;
        #endif
 
                for (size_t i = 0; i < alignmentOffsets.size(); ++i) {
                    // SET ELEMENT VARIABLE
                    var_data& varData = _add_variable(
                      get_array_elem_name(name, i), alignmentOffsets[i], false,
        #if _GLSL_STRUCT_HAS_TYPES
                      elemType
        #else
                      elemSize
        #endif
                    );
 
                        if (i < alignmentOffsets.size() - 1) {
                            varData.set_padding(alignmentOffsets[i + 1] - alignmentOffsets[i] - elemSize);
                        }
                }
 
            // ADD ARRAY VAR
            return _add_variable(
              name, alignmentOffsets.front(), isTopLevel,
        #if _GLSL_STRUCT_HAS_TYPES
              arrayType
        #else
              arrayBaseOffset
        #endif
            );
        }
 
        #if _GLSL_STRUCT_HAS_TYPES
        /// @brief sets standard array variable
        _GLSL_STRUCT_CONSTEXPR17 var_data& _add_array_variable(const std::string_view name,
          const std::vector<size_t>& alignmentOffsets, const bool isTopLevel, const size_t count,
          const base_type_handle& elemType, const size_t arrayBaseOffset) {
            return _add_array_variable(name, alignmentOffsets, isTopLevel, elemType,
              std::make_shared<array_type>(elemType, count, arrayBaseOffset));
        }
        #endif
 
        /// @brief sets mat variable
        _GLSL_STRUCT_CONSTEXPR17 var_data& _add_mat_variable(const std::string_view name,
          const std::vector<size_t>& alignmentOffsets, const bool isTopLevel,
        #if _GLSL_STRUCT_HAS_TYPES
          const ValueType valueType, const size_t columns, const size_t rows,
        #endif
          const size_t vecBaseOffset, const size_t matBaseOffset) {
            return _add_array_variable(
              name, alignmentOffsets, isTopLevel,
        #if _GLSL_STRUCT_HAS_TYPES
              std::make_shared<vec_type>(valueType, rows, vecBaseOffset),
              std::make_shared<mat_type>(valueType, columns, rows, matBaseOffset)
        #else
              vecBaseOffset, matBaseOffset
        #endif
            );
        }
 
        /// @brief sets array of mats variable
        var_data& _add_mat_array_variable(const std::string_view name, const std::vector<std::vector<size_t> >& alignmentOffsets,
          const bool isTopLevel, const size_t count,
        #if _GLSL_STRUCT_HAS_TYPES
          const ValueType valueType, const size_t columns, const size_t rows,
        #endif
          const size_t vecBaseOffset, const size_t matBaseOffset, const size_t arrayBaseOffset, const size_t matPadding) {
        #if _GLSL_STRUCT_HAS_TYPES
            const auto vecType = std::make_shared<vec_type>(valueType, rows, vecBaseOffset);
            const auto matType = std::make_shared<mat_type>(valueType, columns, rows, matBaseOffset);
        #endif
 
                for (size_t i = 0; i < alignmentOffsets.size(); ++i) {
                    const auto& matOffsets = alignmentOffsets[i];
 
                    // ADD SINGLE MAT VARIABLE DATA
                    var_data& varData      = _add_array_variable(
                      get_array_elem_name(name, i), matOffsets, false,
        #if _GLSL_STRUCT_HAS_TYPES
                      vecType, matType
        #else
                      vecBaseOffset, matBaseOffset
        #endif
                    );
 
                        if (i < count - 1) { varData.set_padding(matPadding); }
                }
 
            // ADD ARRAY TYPE POINTER TO FIRST MAT
            var_data& arrayVarData = _add_variable(
              name, alignmentOffsets.front().front(), isTopLevel,
        #if _GLSL_STRUCT_HAS_TYPES
              std::make_shared<array_type>(matType, count, arrayBaseOffset)
        #else
              arrayBaseOffset
        #endif
            );
 
            arrayVarData.set_padding(matPadding);
 
            return arrayVarData;
        }
 
        #pragma endregion
 
        #pragma region BEFORE_ADD_EVENTS
 
        /// @brief calls before add event
        _GLSL_STRUCT_CONSTEXPR17 void _before_add() {
                if _GLSL_STRUCT_CONSTEXPR17 (utils::has_layout_traits_before_add_v<traits_type>) {
                        if _GLSL_STRUCT_CONSTEXPR17 (has_context) {
                            traits_type::before_add(_currentOffset, base_struct::_context);
                        }
                        else { traits_type::before_add(_currentOffset); }
                }
        }
 
        /// @brief calls before add array event
        _GLSL_STRUCT_CONSTEXPR17 void _before_add_array() {
                if _GLSL_STRUCT_CONSTEXPR17 (utils::has_layout_traits_before_add_array_v<traits_type>) {
                        if _GLSL_STRUCT_CONSTEXPR17 (has_context) {
                            traits_type::before_add_array(_currentOffset, base_struct::_context);
                        }
                        else { traits_type::before_add_array(_currentOffset); }
                }
                else { _before_add(); }
        }
 
        /// @brief calls before add scalar event
        _GLSL_STRUCT_CONSTEXPR17 void _before_add_scalar() {
                if _GLSL_STRUCT_CONSTEXPR17 (utils::has_layout_traits_before_add_scalar_v<traits_type>) {
                        if _GLSL_STRUCT_CONSTEXPR17 (has_context) {
                            traits_type::before_add_scalar(_currentOffset, base_struct::_context);
                        }
                        else { traits_type::before_add_scalar(_currentOffset); }
                }
                else { _before_add(); }
        }
 
        /// @brief calls before add vec event
        _GLSL_STRUCT_CONSTEXPR17 void _before_add_vec() {
                if _GLSL_STRUCT_CONSTEXPR17 (utils::has_layout_traits_before_add_vec_v<traits_type>) {
                        if _GLSL_STRUCT_CONSTEXPR17 (has_context) {
                            traits_type::before_add_vec(_currentOffset, base_struct::_context);
                        }
                        else { traits_type::before_add_vec(_currentOffset); }
                }
                else { _before_add(); }
        }
 
        /// @brief calls before add mat event
        _GLSL_STRUCT_CONSTEXPR17 void _before_add_mat() {
                if _GLSL_STRUCT_CONSTEXPR17 (utils::has_layout_traits_before_add_mat_v<traits_type>) {
                        if _GLSL_STRUCT_CONSTEXPR17 (has_context) {
                            traits_type::before_add_mat(_currentOffset, base_struct::_context);
                        }
                        else { traits_type::before_add_mat(_currentOffset); }
                }
                else { _before_add(); }
        }
 
        /// @brief calls before add struct event
        _GLSL_STRUCT_CONSTEXPR17 void _before_add_struct() {
                if _GLSL_STRUCT_CONSTEXPR17 (utils::has_layout_traits_before_add_struct_v<traits_type>) {
                        if _GLSL_STRUCT_CONSTEXPR17 (has_context) {
                            traits_type::before_add_struct(_currentOffset, base_struct::_context);
                        }
                        else { traits_type::before_add_struct(_currentOffset); }
                }
                else { _before_add(); }
        }
 
        #pragma endregion
 
        #pragma region AFTER_ADD_EVENTS
 
        /// @brief calls after add event
        _GLSL_STRUCT_CONSTEXPR17 void _after_add(const size_t baseOffset, const size_t baseAlignment) {
                if _GLSL_STRUCT_CONSTEXPR17 (utils::has_layout_traits_after_add_v<traits_type>) {
                        if _GLSL_STRUCT_CONSTEXPR17 (has_context) {
                            traits_type::after_add(_currentOffset, baseOffset, baseAlignment, base_struct::_context);
                        }
                        else { traits_type::after_add(_currentOffset, baseOffset, baseAlignment); }
                }
        }
 
        /// @brief calls after add array event
        _GLSL_STRUCT_CONSTEXPR17 void _after_add_array(const size_t baseOffset, const size_t baseAlignment) {
                if _GLSL_STRUCT_CONSTEXPR17 (utils::has_layout_traits_after_add_array_v<traits_type>) {
                        if _GLSL_STRUCT_CONSTEXPR17 (has_context) {
                            traits_type::after_add_array(_currentOffset, baseOffset, baseAlignment, base_struct::_context);
                        }
                        else { traits_type::after_add_array(_currentOffset, baseOffset, baseAlignment); }
                }
                else { _after_add(baseOffset, baseAlignment); }
        }
 
        /// @brief calls after add scalar event
        _GLSL_STRUCT_CONSTEXPR17 void _after_add_scalar(const size_t baseOffset, const size_t baseAlignment) {
                if _GLSL_STRUCT_CONSTEXPR17 (utils::has_layout_traits_after_add_scalar_v<traits_type>) {
                        if _GLSL_STRUCT_CONSTEXPR17 (has_context) {
                            traits_type::after_add_scalar(_currentOffset, baseOffset, baseAlignment, base_struct::_context);
                        }
                        else { traits_type::after_add_scalar(_currentOffset, baseOffset, baseAlignment); }
                }
                else { _after_add(baseOffset, baseAlignment); }
        }
 
        /// @brief calls after add vec event
        _GLSL_STRUCT_CONSTEXPR17 void _after_add_vec(const size_t baseOffset, const size_t baseAlignment) {
                if _GLSL_STRUCT_CONSTEXPR17 (utils::has_layout_traits_after_add_vec_v<traits_type>) {
                        if _GLSL_STRUCT_CONSTEXPR17 (has_context) {
                            traits_type::after_add_vec(_currentOffset, baseOffset, baseAlignment, base_struct::_context);
                        }
                        else { traits_type::after_add_vec(_currentOffset, baseOffset, baseAlignment); }
                }
                else { _after_add(baseOffset, baseAlignment); }
        }
 
        /// @brief calls after add mat event
        _GLSL_STRUCT_CONSTEXPR17 void _after_add_mat(const size_t baseOffset, const size_t baseAlignment) {
                if _GLSL_STRUCT_CONSTEXPR17 (utils::has_layout_traits_after_add_mat_v<traits_type>) {
                        if _GLSL_STRUCT_CONSTEXPR17 (has_context) {
                            traits_type::after_add_mat(_currentOffset, baseOffset, baseAlignment, base_struct::_context);
                        }
                        else { traits_type::after_add_mat(_currentOffset, baseOffset, baseAlignment); }
                }
                else if _GLSL_STRUCT_CONSTEXPR17 (utils::has_layout_traits_after_add_v<traits_type>) {
                    _after_add(baseOffset, baseAlignment);
                }
        }
 
        /// @brief calls after add struct event
        _GLSL_STRUCT_CONSTEXPR17 void _after_add_struct(const size_t baseOffset, const size_t baseAlignment) {
                if _GLSL_STRUCT_CONSTEXPR17 (utils::has_layout_traits_after_add_struct_v<traits_type>) {
                        if _GLSL_STRUCT_CONSTEXPR17 (has_context) {
                            traits_type::after_add_struct(_currentOffset, baseOffset, baseAlignment, base_struct::_context);
                        }
                        else { traits_type::after_add_struct(_currentOffset, baseOffset, baseAlignment); }
                }
                else { _after_add(baseOffset, baseAlignment); }
        }
 
        #pragma endregion
 
        #pragma region GET_ALIGNMENT
 
        /// @brief returns array of elements alignment
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR17 size_t _get_array_alignment(const size_t elemBaseAlignment) {
                if _GLSL_STRUCT_CONSTEXPR17 (has_context) {
                    return traits_type::get_array_alignment(elemBaseAlignment, base_struct::_context);
                }
                else { return traits_type::get_array_alignment(elemBaseAlignment); }
        }
 
        /// @brief returns scalar alignment
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR17 size_t _get_scalar_alignment(const ValueType valueType) {
                if _GLSL_STRUCT_CONSTEXPR17 (has_context) {
                    return traits_type::get_scalar_alignment(valueType, base_struct::_context);
                }
                else { return traits_type::get_scalar_alignment(valueType); }
        }
 
        /// @brief returns array of scalars alignment
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR17 size_t _get_scalar_array_alignment(const ValueType valueType) {
            return _get_array_alignment(_get_scalar_alignment(valueType));
        }
 
        /// @brief returns vec alignment
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR17 size_t _get_vec_alignment(const ValueType valueType, const size_t length) {
                if _GLSL_STRUCT_CONSTEXPR17 (has_context) {
                    return traits_type::get_vec_alignment(valueType, length, base_struct::_context);
                }
                else { return traits_type::get_vec_alignment(valueType, length); }
        }
 
        /// @brief returns array of vecs alignment
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR17 size_t _get_vec_array_alignment(const ValueType valueType, const size_t length) {
            return _get_array_alignment(_get_vec_alignment(valueType, length));
        }
 
        /// @brief returns mat alignment
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR17 size_t _get_mat_alignment(const ValueType valueType, const size_t rows) {
            return _get_vec_array_alignment(valueType, rows);
        }
 
        #pragma endregion
 
        #pragma region SPECIALIZED_ADD
 
        /// @brief adds scalar
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR17 size_t _add_scalar(const std::string_view name, const ValueType valueType) {
            // BEFORE ADD SCALAR
            _before_add_scalar();
 
            // GET BASE OFFSET
            const size_t baseOffset      = get_value_type_size(valueType);
 
            // GET BASE ALIGNMENT
            const size_t baseAlignment   = _get_scalar_alignment(valueType);
 
            // GET ALIGNMENT OFFSET
            const size_t alignmentOffset = _add(_currentOffset, baseAlignment, baseOffset);
 
                // CHECK ADD
                if (alignmentOffset == bad_offset()) { return alignmentOffset; }
 
            // ADD VARIABLE DATA
            _add_variable(
              name, alignmentOffset, true,
        #if _GLSL_STRUCT_HAS_TYPES
              std::make_shared<scalar_type>(valueType, baseOffset)
        #else
              baseOffset
        #endif
            );
 
            // AFTER ADD SCALAR
            _after_add_scalar(baseOffset, baseAlignment);
 
            return alignmentOffset;
        }
 
        /// @brief adds array of scalars
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR20 std::vector<size_t> _add_scalar_array(const std::string_view name,
          const ValueType valueType, const size_t count) {
            // CHECK COUNT
                if (!_is_array_count_good(count)) { return std::vector<size_t>(); }
 
            // BEFORE ADD SCALAR ARRAY
            _before_add_array();
 
            // GET BASE OFFSET
            const size_t baseOffset                    = get_value_type_size(valueType);
 
            // GET ARRAY ALIGNMENT
            const size_t arrayBaseAlignment            = _get_scalar_array_alignment(valueType);
 
            // GET ALIGNMENT OFFSETS
            size_t tempOffset                          = _currentOffset;
            const std::vector<size_t> alignmentOffsets = _add_array(tempOffset, arrayBaseAlignment, baseOffset, count);
 
            // CHECK ADD
                if (alignmentOffsets.empty()) { return alignmentOffsets; }
 
            // GET ARRAY SIZE
            const size_t arraySize    = tempOffset - alignmentOffsets.front();
 
            // GET ARRAY PADDING
            const size_t arrayPadding = _calculate_padding(tempOffset, arrayBaseAlignment);
 
                // APPLY PADDING TO CURRENT OFFSET
                if (!_move_current_offset(tempOffset, arrayPadding)) { return std::vector<size_t>(); }
            _currentOffset = tempOffset;
 
            // ADD VARIABLE DATA
            _add_array_variable(name, alignmentOffsets, true,
        #if _GLSL_STRUCT_HAS_TYPES
              count, std::make_shared<scalar_type>(valueType, baseOffset),
        #else
              baseOffset,
        #endif
              arraySize)
              .set_padding(arrayPadding);
 
            // AFTER ADD SCALAR ARRAY
            _after_add_array(arraySize, arrayBaseAlignment);
 
            return alignmentOffsets;
        }
 
        /// @brief adds vec
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR17 size_t _add_vec(const std::string_view name, const size_t length,
          const ValueType valueType) {
                // CHECK VEC LENGTH
                if (!_is_vec_length_good(length)) { return bad_offset(); }
 
            // BEFORE ADD VEC
            _before_add_vec();
 
            // GET BASE OFFSET
            const size_t baseOffset      = get_value_type_size(valueType) * length;
 
            // GET BASE ALIGNMENT
            const size_t baseAlignment   = _get_vec_alignment(valueType, length);
 
            // GET ALIGNMENT OFFSET
            const size_t alignmentOffset = _add(_currentOffset, baseAlignment, baseOffset);
 
                // CHECK ADD
                if (alignmentOffset == bad_offset()) { return alignmentOffset; }
 
            // ADD VARIABLE DATA
            _add_variable(
              name, alignmentOffset, true,
        #if _GLSL_STRUCT_HAS_TYPES
              std::make_shared<vec_type>(valueType, length, baseOffset)
        #else
              baseOffset
        #endif
            );
 
            // AFTER ADD VEC
            _after_add_vec(baseOffset, baseAlignment);
 
            return alignmentOffset;
        }
 
        /// @brief adds array of vecs
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR20 std::vector<size_t> _add_vec_array(const std::string_view name,
          const size_t length, const ValueType valueType, const size_t count) {
            // CHECK COUNT
                if (!_is_array_count_good(count)) { return std::vector<size_t>(); }
 
            // CHECK VEC LENGTH
                if (!_is_vec_length_good(length)) { return std::vector<size_t>(); }
 
            // BEFORE ADD VEC ARRAY
            _before_add_array();
 
            // GET BASE OFFSET
            const size_t baseOffset                    = get_value_type_size(valueType) * length;
 
            // GET ARRAY ALIGNMENT
            const size_t arrayBaseAlignment            = _get_vec_array_alignment(valueType, length);
 
            // GET ALIGNMENT OFFSETS
            size_t tempOffset                          = _currentOffset;
            const std::vector<size_t> alignmentOffsets = _add_array(tempOffset, arrayBaseAlignment, baseOffset, count);
 
                // CHECK ADD
                if (alignmentOffsets.empty()) { return alignmentOffsets; }
 
            // GET ARRAY SIZE
            const size_t arraySize    = tempOffset - alignmentOffsets.front();
 
            // GET ARRAY PADDING
            const size_t arrayPadding = _calculate_padding(tempOffset, arrayBaseAlignment);
 
                // APPLY PADDING TO CURRENT OFFSET
                if (!_move_current_offset(tempOffset, arrayPadding)) { return std::vector<size_t>(); }
            _currentOffset = tempOffset;
 
            // ADD VARIABLE DATA
            _add_array_variable(name, alignmentOffsets, true,
        #if _GLSL_STRUCT_HAS_TYPES
              count, std::make_shared<vec_type>(valueType, length, baseOffset),
        #else
              baseOffset,
        #endif
              arraySize)
              .set_padding(arrayPadding);
 
            // AFTER ADD VEC ARRAY
            _after_add_array(arraySize, arrayBaseAlignment);
 
            return alignmentOffsets;
        }
 
        /// @brief adds mat
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR20 std::vector<size_t> _add_mat(const std::string_view name, const size_t columns,
          const size_t rows, const ValueType valueType) {
            // CHECK MAT COLUMNS
                if (!_is_vec_length_good(columns)) { return std::vector<size_t>(); }
 
            // CHECK MAT ROWS
                if (!_is_vec_length_good(rows)) { return std::vector<size_t>(); }
 
            // BEFORE ADD MAT
            _before_add_mat();
 
            // GET BASE OFFSET
            const size_t vecBaseOffset                 = get_value_type_size(valueType) * rows;
 
            // GET MAT ALIGNMENT
            const size_t matBaseAlignment              = _get_mat_alignment(valueType, rows);
 
            // GET ALIGNMENT OFFSETS
            size_t tempOffset                          = _currentOffset;
            const std::vector<size_t> alignmentOffsets = _add_array(tempOffset, matBaseAlignment, vecBaseOffset, columns);
 
                // CHECK ADD
                if (alignmentOffsets.empty()) { return alignmentOffsets; }
 
            // GET MAT SIZE
            const size_t matSize    = tempOffset - alignmentOffsets.front();
 
            // GET ARRAY PADDING
            const size_t matPadding = _calculate_padding(tempOffset, matBaseAlignment);
 
                // APPLY PADDING TO CURRENT OFFSET
                if (!_move_current_offset(tempOffset, matPadding)) { return std::vector<size_t>(); }
            _currentOffset = tempOffset;
 
            // ADD VARIABLE DATA
            _add_mat_variable(name, alignmentOffsets, true,
        #if _GLSL_STRUCT_HAS_TYPES
              valueType, columns, rows,
        #endif
              vecBaseOffset, matSize)
              .set_padding(matPadding);
 
            // AFTER ADD MAT
            _after_add_mat(matSize, matBaseAlignment);
 
            return alignmentOffsets;
        }
 
        /// @brief adds array of mats
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR20 std::vector<std::vector<size_t> > _add_mat_array(const std::string_view name,
          const size_t columns, const size_t rows, const ValueType valueType, const size_t count) {
            // CHECK COUNT
                if (!_is_array_count_good(count)) { return std::vector<std::vector<size_t> >(); }
 
            // CHECK MAT COLUMNS
                if (!_is_vec_length_good(columns)) { return std::vector<std::vector<size_t> >(); }
 
                // CHECK MAT ROWS
                if (!_is_vec_length_good(rows)) { return std::vector<std::vector<size_t> >(); }
 
            // BEFORE ADD MAT ARRAY
            _before_add_array();
 
            // GET BASE OFFSET
            const size_t vecBaseOffset    = get_value_type_size(valueType) * rows;
 
            // GET ARRAY ALIGNMENT
            const size_t matBaseAlignment = _get_mat_alignment(valueType, rows);
 
            // GET MATS ALIGNMENT OFFSETS
            size_t tempOffset             = _currentOffset;
 
            size_t matSize                = 0;
            size_t matPadding             = 0;
 
            std::vector<std::vector<size_t> > alignmentOffsetsPerMat;
            alignmentOffsetsPerMat.reserve(count);
                for (size_t i = 0; i < count; ++i) {
                    // GET VEC ALIGNMENT OFFSETS
                    const std::vector<size_t> alignmentOffsets = _add_array(tempOffset, matBaseAlignment, vecBaseOffset, columns);
 
                        // CHECK ADD
                        if (alignmentOffsets.empty()) { return std::vector<std::vector<size_t> >(); }
 
                        // CALCULATE SIZE AND PADDING ONCE
                        if (matSize == 0) {
                            // CALCULATE SIZE
                            matSize    = tempOffset - alignmentOffsets.front();
 
                            // CALCULATE PADDING
                            matPadding = _calculate_padding(tempOffset, matBaseAlignment);
                        }
 
                    // APPLY PADDING TO CURRENT OFFSET
                        if (i != count - 1) {
                                if (!_move_current_offset(tempOffset, matPadding)) { return std::vector<std::vector<size_t> >(); }
                        }
 
                    alignmentOffsetsPerMat.push_back(alignmentOffsets);
                }
 
            // GET ARRAY SIZE
            const size_t arraySize = tempOffset - alignmentOffsetsPerMat.front().front();
 
                // APPLY PADDING TO CURRENT OFFSET
                if (!_move_current_offset(tempOffset, matPadding)) { return std::vector<std::vector<size_t> >(); }
            _currentOffset = tempOffset;
 
            // ADD VARIABLE DATA
            _add_mat_array_variable(name, alignmentOffsetsPerMat, true, count,
        #if _GLSL_STRUCT_HAS_TYPES
              valueType, columns, rows,
        #endif
              vecBaseOffset, matSize, arraySize, matPadding);
 
            // AFTER ADD SCALAR ARRAY
            _after_add_array(arraySize, matBaseAlignment);
 
            return alignmentOffsetsPerMat;
        }
 
        /// @brief adds struct
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR20 size_t _add_struct(const std::string_view name, const size_t baseAlignment,
          const size_t baseOffset, const mstd::ordered_map<std::string, var_data>& values) {
                // CHECK VALUES
                if (!_is_struct_not_empty(values)) { return bad_offset(); }
 
            // BEFORE ADD STRUCT
            _before_add_struct();
 
            // GET ALIGNMENT OFFSET
            const size_t alignmentOffset = _add(_currentOffset, baseAlignment, baseOffset);
 
                // CHECK ADD
                if (alignmentOffset == bad_offset()) { return alignmentOffset; }
 
            // ADD VARIABLE DATA
            _add_variable(
              name, alignmentOffset, true,
        #if _GLSL_STRUCT_HAS_TYPES
              std::make_shared<struct_type>(values, baseOffset)
        #else
              baseOffset
        #endif
            );
 
            // ADD STRUCTURE VARIABLES DATA
                for (const auto& [value_name, data] : values) {
                    _add_variable(
                      get_struct_elem_name(name, value_name), alignmentOffset + data.get_offset(), false,
        #if _GLSL_STRUCT_HAS_TYPES
                      data.get_type()
        #else
                      data.get_size()
        #endif
                    )
                      .set_padding(data.get_padding());
                }
 
            // AFTER ADD STRUCT
            _after_add_struct(baseOffset, baseAlignment);
 
            return alignmentOffset;
        }
 
        /// @brief adds array of structs
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR20 std::vector<size_t> _add_struct_array(const std::string_view name,
          const size_t baseAlignment, const size_t baseOffset, const mstd::ordered_map<std::string, var_data>& values,
          const size_t count) {
            // CHECK COUNT
                if (!_is_array_count_good(count)) { return std::vector<size_t>(); }
 
            // CHECK VALUES
                if (!_is_struct_not_empty(values)) { return std::vector<size_t>(); }
 
            // BEFORE ADD STRUCTS ARRAY
            _before_add_array();
 
            // GET ARRAY ALIGNMENT
            const size_t arrayBaseAlignment            = _get_array_alignment(baseAlignment);
 
            // GET ALIGNMENT OFFSETS
            size_t tempOffset                          = _currentOffset;
            const std::vector<size_t> alignmentOffsets = _add_array(tempOffset, arrayBaseAlignment, baseOffset, count);
 
                // CHECK ADD
                if (alignmentOffsets.empty()) { return alignmentOffsets; }
 
            // GET ARRAY SIZE
            const size_t arraySize    = tempOffset - alignmentOffsets.front();
 
            // GET ARRAY PADDING
            const size_t arrayPadding = _calculate_padding(tempOffset, arrayBaseAlignment);
 
                // APPLY PADDING TO CURRENT OFFSET
                if (!_move_current_offset(tempOffset, arrayPadding)) { return std::vector<size_t>(); }
            _currentOffset = tempOffset;
 
            // Add variables
                for (size_t i = 0; i < count; ++i) {
                    const std::string arrayElemName = get_array_elem_name(name, i);
                    const size_t alignmentOffset    = alignmentOffsets[i];
 
                        // ADD STRUCTURE VARIABLES DATA
                        for (const auto& [value_name, data] : values) {
                            _add_variable(
                              get_struct_elem_name(arrayElemName, value_name), alignmentOffset + data.get_offset(), false,
        #if _GLSL_STRUCT_HAS_TYPES
                              data.get_type()
        #else
                              data.get_size()
        #endif
                            )
                              .set_padding(data.get_padding());
                        }
                }
 
            // ADD VARIABLE DATA
            _add_array_variable(name, alignmentOffsets, true,
        #if _GLSL_STRUCT_HAS_TYPES
              count, std::make_shared<struct_type>(values, baseOffset),
        #else
              baseOffset,
        #endif
              arraySize)
              .set_padding(arrayPadding);
 
            // AFTER ADD SCALAR ARRAY
            _after_add_array(arraySize, arrayBaseAlignment);
 
            return alignmentOffsets;
        }
 
        /// @brief adds multiple variables
        template<class T, class... Ts, size_t Num, size_t... Nums>
        _GLSL_STRUCT_CONSTEXPR17 void _add_variables(const glsl_variable<T, Num>& var,
          const glsl_variable<Ts, Nums>&... vars) noexcept {
            using VarType = glsl_variable<T, Num>;
 
                if _GLSL_STRUCT_CONSTEXPR17 (VarType::is_layout) {
                        if _GLSL_STRUCT_CONSTEXPR17 (VarType::is_array) { add(var.varName, var.layout, Num); }
                        else { add(var.varName, var.layout); }
                }
                else {
                        if _GLSL_STRUCT_CONSTEXPR17 (VarType::is_array) { add<T>(var.varName, Num); }
                        else { add<T>(var.varName); }
                }
                if _GLSL_STRUCT_CONSTEXPR17 (sizeof...(Ts) > 0 && sizeof...(Nums) > 0) { _add_variables(vars...); }
        }
 
        #pragma endregion
 
    public:
        #pragma region CONSTRUCTORS_WITHOUT_CONTEXT
        /// @brief default constructor without providing context
        #if !_GLSL_STRUCT_HAS_CXX20
        template<class T = traits_type,
          std::enable_if_t<(!has_context || (has_context && std::is_default_constructible_v<base_struct>)) &&
                             std::is_same_v<T, traits_type>,
            bool>        = true>
        #endif
        _GLSL_STRUCT_CONSTEXPR17 base_layout() noexcept _GLSL_STRUCT_REQUIRES(!has_context ||
                                                                              (has_context &&
                                                                                std::is_default_constructible_v<base_struct>))
            : base_struct() {
        }
 
        /// @brief constructor for multiple variables
        #if _GLSL_STRUCT_HAS_CXX20
        template<class... Ts, size_t... Nums>
        #else
        template<class... Ts, size_t... Nums,
          std::enable_if_t<!has_context || (has_context && std::is_default_constructible_v<base_struct>), bool> = true>
        #endif
        _GLSL_STRUCT_CONSTEXPR17 explicit base_layout(
          const glsl_variable<Ts, Nums>&... vars
        ) noexcept _GLSL_STRUCT_REQUIRES(!has_context || (has_context && std::is_default_constructible_v<base_struct>))
            : base_struct() {
            _add_variables(vars...);
        }
 
        #pragma endregion
 
        #pragma region CONSTRUCTORS_WITH_CONTEXT
        /// @brief constructor with provided context
        #if !_GLSL_STRUCT_HAS_CXX20
        template<class T = traits_type, std::enable_if_t<has_context && std::is_same_v<T, traits_type>, bool> = true>
        #endif
        _GLSL_STRUCT_CONSTEXPR17 explicit base_layout(
          const _GLSL_STRUCT_TYPENAME17 base_struct::context_type& ctx
        ) noexcept _GLSL_STRUCT_REQUIRES(has_context)
            : base_struct(ctx) {
        }
 
        /// @brief constructor for multiple variables and with provided context
        #if _GLSL_STRUCT_HAS_CXX20
        template<class... Ts, size_t... Nums>
        #else
        template<class... Ts, size_t... Nums, std::enable_if_t<has_context, bool> = true>
        #endif
        _GLSL_STRUCT_CONSTEXPR17 explicit base_layout(const glsl_variable<Ts, Nums>&... vars,
          const _GLSL_STRUCT_TYPENAME17 base_struct::context_type& ctx) noexcept _GLSL_STRUCT_REQUIRES(has_context)
            : base_struct(ctx) {
            _add_variables(vars...);
        }
 
        #pragma endregion
 
        /// @brief default copy constructor
        _GLSL_STRUCT_CONSTEXPR17 base_layout(const base_layout& other) noexcept            = default;
 
        /// @brief default move constructor
        _GLSL_STRUCT_CONSTEXPR17 base_layout(base_layout&& other) noexcept                 = default;
 
        /// @brief default destructor
        _GLSL_STRUCT_CONSTEXPR20 ~base_layout() noexcept                                   = default;
 
        /// @brief default copy assign operator
        _GLSL_STRUCT_CONSTEXPR17 base_layout& operator=(const base_layout& other) noexcept = default;
 
        /// @brief default move assign operator
        _GLSL_STRUCT_CONSTEXPR17 base_layout& operator=(base_layout&& other) noexcept      = default;
 
        /// @brief value indicating error while returning offset
        [[nodiscard]] static _GLSL_STRUCT_CONSTEXPR17 size_t bad_offset() noexcept { return std::numeric_limits<size_t>::max(); }
 
        /// @brief returns true if layout contains variable with given name
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR17 bool contains(const std::string_view name) const noexcept {
            return _variables.contains(name.data());
        }
 
        /// @brief returns variable data
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR17 const var_data& get(const std::string_view name) const noexcept {
            glsl_struct_assert(contains(name), "The variable name doesn't exists!");
            return _variables.at(name.data());
        }
 
        /// @brief returns array count (if single value then returns 1 else if value doesn't exist returns 0 else array count)
        [[nodiscard]]
        #if _GLSL_STRUCT_HAS_TYPES || _GLSL_STRUCT_HAS_CXX20
        _GLSL_STRUCT_CONSTEXPR17
        #endif
          size_t get_array_count(const std::string_view name) const noexcept {
                if (!contains(name)) { return 0; }
 
        #if _GLSL_STRUCT_HAS_TYPES
            const base_type_handle& varType = get_type(name);
 
                if (is_of_type<mat_type>(varType)) { return static_type_cast<mat_type>(varType)->get_array_count(); }
                if (is_of_type<array_type>(varType)) { return static_type_cast<array_type>(varType)->get_count(); }
        #else
            size_t i = 0;
                while (true) {
                    const std::string valueName = get_array_elem_name(name, i);
 
                        if (!contains(valueName)) { break; }
                    ++i;
                }
 
                if (i != 0) { return i; }
        #endif
            return 1;
        }
 
        /// @brief returns elem size of array
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR17 size_t get_array_elem_size(const std::string_view name) const noexcept {
            const size_t arrayCount = get_array_count(name);
 
                if (arrayCount == 0) { return 0; }
 
                if (arrayCount == 1) { return _variables.at(name.data()).get_size(); }
 
            return _variables.at(get_array_elem_name(name, 0)).get_size();
        }
 
        /// @brief returns offset of variable with given name
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR17 size_t get_offset(const std::string_view name) const noexcept {
            return get(name).get_offset();
        }
 
        /// @brief returns offsets of array elements
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR20 std::vector<size_t> get_array_offsets(const std::string_view name) const noexcept {
            const size_t arrayCount = get_array_count(name);
 
                if (arrayCount == 0) { return {}; }
 
                if (arrayCount == 1) { return { _variables.at(name.data()).get_offset() }; }
 
            std::vector<size_t> values;
            values.reserve(arrayCount);
                for (size_t i = 0; i != arrayCount; ++i) {
                    values.push_back(_variables.at(get_array_elem_name(name, i)).get_offset());
                }
            return values;
        }
 
        #if _GLSL_STRUCT_HAS_TYPES
        /// @brief returns type of variable
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR17 const base_type_handle& get_type(const std::string_view name) const noexcept {
            return get(name).get_type();
        }
 
                /// @brief returns type of variable with casting to given type (dynamic casting occurs)
            #if _GLSL_STRUCT_HAS_CXX20
        template<utils::glsl_type Type>
            #else
        template<class Type, std::enable_if_t<utils::is_glsl_type_v<Type>, bool> = true>
            #endif
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR17 std::shared_ptr<Type> get_type(const std::string_view name) const noexcept {
            return dynamic_type_cast<Type>(get_type(name));
        }
        #endif
 
        /// @brief returns total size of variable (size + padding)
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR17 size_t get_total_size(const std::string_view name) const noexcept {
            return get(name).get_total_size();
        }
 
        /// @brief returns size of variable
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR17 size_t get_size(const std::string_view name) const noexcept {
            return get(name).get_size();
        }
 
        /// @brief returns padding of variable
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR17 size_t get_padding(const std::string_view name) const noexcept {
            return get(name).get_padding();
        }
 
        /// @brief returns all variables names
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR20 std::vector<std::string> get_names() const noexcept {
            std::vector<std::string> names;
            names.reserve(_variables.size());
 
        #if _GLSL_STRUCT_HAS_CXX20
                for (const auto& name : _variables | std::views::keys) { names.push_back(name); }
        #else
                for (const auto& [name, data] : _variables) { names.push_back(name); }
        #endif
 
            return names;
        }
 
        /// @brief returns all variables and their data
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR20 const mstd::ordered_map<std::string, var_data>& get_variables() const noexcept {
            return _variables;
        }
 
        /// @brief returns all top level variables and their data
        [[nodiscard]] mstd::ordered_map<std::string, var_data> get_top_level_variables() const noexcept {
            mstd::ordered_map<std::string, var_data> variables;
                for (const auto& [name, data] : _variables) {
                        if (!data.is_top_level()) { continue; }
                    variables.emplace_back(name, data);
                }
            return variables;
        }
 
        /// @brief returns base alignment of layout
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR17 size_t base_alignment() const noexcept {
                if _GLSL_STRUCT_CONSTEXPR17 (has_context) { return traits_type::get_struct_alignment(base_struct::_context); }
                else { return traits_type::get_struct_alignment(); }
        }
 
        /// @brief returns size of layout
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR17 size_t size() const noexcept { return _currentOffset; }
 
        /// @brief clears layout and all variables
        _GLSL_STRUCT_CONSTEXPR17 void clear() noexcept {
            _currentOffset = 0;
            _variables.clear();
        }
 
        #pragma region ADD_SCALAR
        /// @brief adds scalar
        #if _GLSL_STRUCT_HAS_CXX20
        template<utils::glsl_scalar S>
        #else
        template<class S, std::enable_if_t<utils::is_glsl_scalar_v<S>, bool> = true>
        #endif
        _GLSL_STRUCT_CONSTEXPR17 size_t add(const std::string_view name) {
            return _add_scalar(name, get_scalar_value_type<S>());
        }
 
        #pragma endregion
 
        #pragma region ADD_SCALARS_ARRAY
 
        /// @brief adds array of scalars
        #if _GLSL_STRUCT_HAS_CXX20
        template<utils::glsl_scalar S>
        #else
        template<class S, std::enable_if_t<utils::is_glsl_scalar_v<S>, bool> = true>
        #endif
        _GLSL_STRUCT_CONSTEXPR20 std::vector<size_t> add(const std::string_view name, const size_t count) {
            return _add_scalar_array(name, get_scalar_value_type<S>(), count);
        }
 
        /// @brief adds array of scalars
        #if _GLSL_STRUCT_HAS_CXX20
        template<utils::glsl_scalars_array SA>
        #else
        template<class SA, std::enable_if_t<utils::is_glsl_scalars_array_v<SA>, bool> = true>
        #endif
        _GLSL_STRUCT_CONSTEXPR20 std::vector<size_t> add(const std::string_view name, const size_t count) {
            using S = utils::array_value_type_t<SA>;
            return add<S>(name, count);
        }
 
        /// @brief adds array of scalars
        #if _GLSL_STRUCT_HAS_CXX20
        template<utils::glsl_scalars_static_size_array SA>
        #else
        template<class SA, std::enable_if_t<utils::is_glsl_scalars_static_size_array_v<SA>, bool> = true>
        #endif
        _GLSL_STRUCT_CONSTEXPR20 std::vector<size_t> add(const std::string_view name) {
            return add<SA>(name, utils::array_static_size_v<SA>);
        }
 
        #pragma endregion
 
        #pragma region ADD_VEC
        /// @brief adds vec
        #if _GLSL_STRUCT_HAS_CXX20
        template<utils::glsl_vec V>
        #else
        template<class V, std::enable_if_t<utils::is_glsl_vec_v<V>, bool> = true>
        #endif
        _GLSL_STRUCT_CONSTEXPR17 size_t add(const std::string_view name) {
            return _add_vec(name, get_vec_length<V>(), get_vec_value_type<V>());
        }
 
        #pragma endregion
 
        #pragma region ADD_VECS_ARRAY
 
        /// @brief adds array of vecs
        #if _GLSL_STRUCT_HAS_CXX20
        template<utils::glsl_vec V>
        #else
        template<class V, std::enable_if_t<utils::is_glsl_vec_v<V>, bool> = true>
        #endif
        _GLSL_STRUCT_CONSTEXPR20 std::vector<size_t> add(const std::string_view name, const size_t count) {
            return _add_vec_array(name, get_vec_length<V>(), get_vec_value_type<V>(), count);
        }
 
        /// @brief adds array of vecs
        #if _GLSL_STRUCT_HAS_CXX20
        template<utils::glsl_vecs_array VA>
        #else
        template<class VA, std::enable_if_t<utils::is_glsl_vecs_array_v<VA>, bool> = true>
        #endif
        _GLSL_STRUCT_CONSTEXPR20 std::vector<size_t> add(const std::string_view name, const size_t count) {
            using V = utils::array_value_type_t<VA>;
            return add<V>(name, count);
        }
 
        /// @brief adds array of vecs
        #if _GLSL_STRUCT_HAS_CXX20
        template<utils::glsl_vecs_static_size_array VA>
        #else
        template<class VA, std::enable_if_t<utils::is_glsl_vecs_static_size_array_v<VA>, bool> = true>
        #endif
        _GLSL_STRUCT_CONSTEXPR20 std::vector<size_t> add(const std::string_view name) {
            return add<VA>(name, utils::array_static_size_v<VA>);
        }
 
        #pragma endregion
 
        #pragma region ADD_MAT
        /// @brief adds mat
        #if _GLSL_STRUCT_HAS_CXX20
        template<utils::glsl_mat M>
        #else
        template<class M, std::enable_if_t<utils::is_glsl_mat_v<M>, bool> = true>
        #endif
        _GLSL_STRUCT_CONSTEXPR20 std::vector<size_t> add(const std::string_view name) {
            return _add_mat(name, get_mat_columns<M>(), get_mat_rows<M>(), get_mat_value_type<M>());
        }
 
        #pragma endregion
 
        #pragma region ADD_MATS_ARRAY
 
        /// @brief adds array of mats
        #if _GLSL_STRUCT_HAS_CXX20
        template<utils::glsl_mat M>
        #else
        template<class M, std::enable_if_t<utils::is_glsl_mat_v<M>, bool> = true>
        #endif
        _GLSL_STRUCT_CONSTEXPR20 std::vector<std::vector<size_t> > add(const std::string_view name, const size_t count) {
            return _add_mat_array(name, get_mat_columns<M>(), get_mat_rows<M>(), get_mat_value_type<M>(), count);
        }
 
        /// @brief adds array of mats
        #if _GLSL_STRUCT_HAS_CXX20
        template<utils::glsl_mats_array MA>
        #else
        template<class MA, std::enable_if_t<utils::is_glsl_mats_array_v<MA>, bool> = true>
        #endif
        _GLSL_STRUCT_CONSTEXPR20 std::vector<std::vector<size_t> > add(const std::string_view name, const size_t count) {
            using M = utils::array_value_type_t<MA>;
            return add<M>(name, count);
        }
 
        /// @brief adds array of mats
        #if _GLSL_STRUCT_HAS_CXX20
        template<utils::glsl_mats_static_size_array MA>
        #else
        template<class MA, std::enable_if_t<utils::is_glsl_mats_static_size_array_v<MA>, bool> = true>
        #endif
        _GLSL_STRUCT_CONSTEXPR20 std::vector<std::vector<size_t> > add(const std::string_view name) {
            return add<MA>(name, utils::array_static_size_v<MA>);
        }
 
        #pragma endregion
 
        #pragma region ADD_STRUCT
 
        /// @brief adds struct with given layout
        _GLSL_STRUCT_CONSTEXPR17 size_t add(const std::string_view name, const base_layout& layout) {
            return _add_struct(name, layout.base_alignment(), layout._currentOffset, layout._variables);
        }
 
        #pragma endregion
 
        #pragma region ADD_STRUCTS_ARRAY
 
        /// @brief adds array of structs with given layout
        _GLSL_STRUCT_CONSTEXPR20 std::vector<size_t> add(const std::string_view name, const base_layout& layout,
          const size_t count) {
            return _add_struct_array(name, layout.base_alignment(), layout._currentOffset, layout._variables, count);
        }
 
        #pragma endregion
 
        /// @brief checks equality of layouts
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR17 bool operator==(const base_layout& other) const noexcept {
            return _currentOffset == other._currentOffset && _variables == other._variables;
        }
 
        /// @brief default not equal operator
        [[nodiscard]] _GLSL_STRUCT_CONSTEXPR17 bool operator!=(const base_layout& other) const noexcept
        #if _GLSL_STRUCT_HAS_CXX20
          = default;
        #else
        {
            return !(*this == other);
        }
        #endif
    };
} // namespace glslstruct
 
/**
 * @brief std::hash overload for base_layout
 * @ingroup glslstruct
 * @tparam Traits layout traits type
 */
template<class Traits>
struct std::hash<glslstruct::base_layout<Traits> > {
    [[nodiscard]] _GLSL_STRUCT_CONSTEXPR17 size_t operator()(const glslstruct::base_layout<Traits>& layout) const noexcept {
        size_t seed = mstd::hash_combine(layout._currentOffset, layout._maxAlignment);
            for (const auto& [name, data] : layout._variables) { mstd::hash_append(seed, name, data); }
        return seed;
    }
};
    #endif
#endif