yyc12345
9ce1608be0
- fix the include of stacktrace error. - fix env include issues. - fix wrong include for libcxx enumerate patch. - fix libcxx enumerate patch build issue. - re-add default move and copy ctor for tabulate class. - remove const decorator for clap manual member to resolve default ctor error.
113 lines
3.8 KiB
C++
113 lines
3.8 KiB
C++
#pragma once
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#include "../../macro/stl_detector.hpp"
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#if defined(YYCC_STL_CLANGSTL)
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/**
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* @private
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* @file This is the polyfill for LLVM libcxx std::enumerate.
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* This should be removed once libcxx provide it.
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* This polyfill is generated by AI.
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*/
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#include <ranges>
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#include <utility>
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#include <tuple>
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#include <cstddef>
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#include <iterator>
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namespace std::ranges::views {
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// 简化的enumerate实现
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namespace detail {
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template<typename R>
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class enumerate_view {
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private:
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R _range;
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size_t _start;
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template<bool Const>
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class iterator {
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using Base = conditional_t<Const, const R, R>;
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using Iter = decltype(std::ranges::begin(std::declval<Base&>()));
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Iter _iter;
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size_t _index;
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public:
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using iterator_category = typename std::iterator_traits<Iter>::iterator_category;
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using value_type = std::tuple<size_t, decltype(*_iter)>;
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using difference_type = typename std::iterator_traits<Iter>::difference_type;
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iterator(Iter iter, size_t index) : _iter(iter), _index(index) {}
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auto operator*() const { return std::tuple<size_t, decltype(*_iter)>(_index, *_iter); }
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iterator& operator++() {
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++_iter;
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++_index;
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return *this;
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}
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iterator operator++(int) {
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auto tmp = *this;
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++*this;
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return tmp;
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}
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bool operator==(const iterator& other) const { return _iter == other._iter; }
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bool operator!=(const iterator& other) const { return _iter != other._iter; }
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// 支持双向迭代
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iterator& operator--()
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requires std::bidirectional_iterator<Iter>
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{
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--_iter;
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--_index;
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return *this;
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}
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iterator operator--(int)
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requires std::bidirectional_iterator<Iter>
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{
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auto tmp = *this;
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--*this;
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return tmp;
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}
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};
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public:
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enumerate_view(R range, size_t start = 0) : _range(std::move(range)), _start(start) {}
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auto begin() { return iterator<false>(std::ranges::begin(_range), _start); }
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auto end() { return iterator<false>(std::ranges::end(_range), _start + std::ranges::distance(_range)); }
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auto begin() const { return iterator<true>(std::ranges::begin(_range), _start); }
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auto end() const { return iterator<true>(std::ranges::end(_range), _start + std::ranges::distance(_range)); }
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};
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// 适配器函数对象
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struct enumerate_fn {
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template<std::ranges::range R>
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auto operator()(R&& r, size_t start = 0) const {
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return enumerate_view<std::ranges::views::all_t<R>>(std::forward<R>(r), start);
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}
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// 用于管道操作符的版本
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auto operator()(size_t start = 0) const {
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return [start](auto&& r) {
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return enumerate_view<std::ranges::views::all_t<decltype(r)>>(std::forward<decltype(r)>(r), start);
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};
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}
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};
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} // namespace detail
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inline constexpr detail::enumerate_fn enumerate;
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} // namespace std::ranges::views
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#endif
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