156 lines
4.7 KiB
C++
156 lines
4.7 KiB
C++
#pragma once
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/*
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* Copyright (C) 2024 Brett Terpstra
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef BLT_GP_PROGRAM_H
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#define BLT_GP_PROGRAM_H
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#include <blt/gp/stack.h>
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#include <cstddef>
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#include <blt/gp/fwdecl.h>
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#include <functional>
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#include <blt/std/ranges.h>
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#include <blt/std/types.h>
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#include <blt/std/utility.h>
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#include <type_traits>
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#include <string_view>
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#include <string>
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#include <utility>
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#include <iostream>
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namespace blt::gp
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{
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class identifier
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{
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};
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class type
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{
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public:
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template<typename T>
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static type make_type(blt::size_t id)
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{
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return type(sizeof(T), id, blt::type_string<T>());
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}
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[[nodiscard]] blt::size_t size() const
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{
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return size_;
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}
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[[nodiscard]] blt::size_t id() const
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{
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return id_;
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}
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[[nodiscard]] std::string_view name() const
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{
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return name_;
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}
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private:
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type(size_t size, size_t id, std::string_view name): size_(size), id_(id), name_(name)
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{}
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blt::size_t size_;
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blt::size_t id_;
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std::string name_;
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};
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class type_system
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{
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public:
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type_system() = default;
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template<typename T>
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inline type register_type()
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{
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types.push_back(type::make_type<T>(types.size()));
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return types.back();
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}
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private:
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std::vector<type> types;
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};
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template<typename Return, typename... Args>
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class operation
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{
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public:
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using function_t = std::function<Return(Args...)>;
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operation(const operation& copy) = default;
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operation(operation&& move) = default;
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explicit operation(const function_t& functor): func(functor)
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{}
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explicit operation(function_t&& functor): func(std::move(functor))
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{}
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template<blt::u64 index>
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[[nodiscard]] inline constexpr blt::size_t getByteOffset() const
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{
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blt::size_t offset = 0;
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blt::size_t current_index = 0;
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((offset += (current_index++ > index ? stack_allocator::aligned_size<Args>() : 0)), ...);
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return offset;
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}
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template<typename CurrentArgument, blt::u64 index>
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inline CurrentArgument& getArgument(stack_allocator& allocator) const
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{
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return allocator.from<CurrentArgument>(getByteOffset<index>());
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}
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template<blt::u64... indices>
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inline Return sequence_to_indices(stack_allocator& allocator, std::integer_sequence<blt::u64, indices...>) const
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{
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return func(getArgument<Args, indices>(allocator)...);
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}
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[[nodiscard]] inline Return operator()(stack_allocator& allocator) const
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{
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auto seq = std::make_integer_sequence<blt::u64, sizeof...(Args)>();
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Return ret = sequence_to_indices(allocator, seq);
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constexpr auto total_bytes = (stack_allocator::aligned_size<Args>() + ...);
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allocator.pop_bytes(total_bytes);
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return ret;
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}
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private:
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// template<typename T, blt::size_t index>
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// static inline T& access_pack_index(blt::span<void*> args)
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// {
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// return *reinterpret_cast<T*>(args[index]);
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// }
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//
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// template<typename T, T... indexes>
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// Return function_evaluator(blt::span<void*> args, std::integer_sequence<T, indexes...>)
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// {
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// return func(access_pack_index<Args, indexes>(args)...);
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// }
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function_t func;
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};
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}
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#endif //BLT_GP_PROGRAM_H
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