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1 | #pragma once | ||
2 | |||
3 | #include <cstdlib> | ||
4 | #include <utility> | ||
5 | #include <type_traits> | ||
6 | |||
7 | #include "../Common.h" | ||
8 | |||
9 | namespace CXXIter { | ||
10 | |||
11 | // ################################################################################################ | ||
12 | // CASTER | ||
13 | // ################################################################################################ | ||
14 | namespace op { | ||
15 | /** @private */ | ||
16 | template<typename TChainInput, typename TItem> | ||
17 | requires std::is_object_v<TItem> | ||
18 | class [[nodiscard(CXXITER_CHAINER_NODISCARD_WARNING)]] Caster : public IterApi<Caster<TChainInput, TItem>> { | ||
19 | friend struct trait::Iterator<Caster<TChainInput, TItem>>; | ||
20 | friend struct trait::DoubleEndedIterator<Caster<TChainInput, TItem>>; | ||
21 | friend struct trait::ExactSizeIterator<Caster<TChainInput, TItem>>; | ||
22 | private: | ||
23 | TChainInput input; | ||
24 | public: | ||
25 | 5 | constexpr Caster(TChainInput&& input) : input(std::move(input)) {} | |
26 | }; | ||
27 | } | ||
28 | // ------------------------------------------------------------------------------------------------ | ||
29 | /** @private */ | ||
30 | template<typename TChainInput, typename TItem> | ||
31 | requires std::is_object_v<TItem> | ||
32 | struct trait::Iterator<op::Caster<TChainInput, TItem>> { | ||
33 | using ChainInputIterator = trait::Iterator<TChainInput>; | ||
34 | // CXXIter Interface | ||
35 | using Self = op::Caster<TChainInput, TItem>; | ||
36 | using Item = TItem; | ||
37 | |||
38 | 10 | static constexpr inline IterValue<Item> next(Self& self) { | |
39 |
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10 | auto item = ChainInputIterator::next(self.input); |
40 |
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26 | return item.template map<Item>([](auto&& item) { return static_cast<Item>(item); }); |
41 | } | ||
42 | 2 | static constexpr inline SizeHint sizeHint(const Self& self) { return ChainInputIterator::sizeHint(self.input); } | |
43 | 1 | static constexpr inline size_t advanceBy(Self& self, size_t n) { return ChainInputIterator::advanceBy(self.input, n); } | |
44 | }; | ||
45 | /** @private */ | ||
46 | template<CXXIterDoubleEndedIterator TChainInput, typename TItem> | ||
47 | requires std::is_object_v<TItem> | ||
48 | struct trait::DoubleEndedIterator<op::Caster<TChainInput, TItem>> { | ||
49 | using ChainInputIterator = trait::DoubleEndedIterator<TChainInput>; | ||
50 | using Self = op::Caster<TChainInput, TItem>; | ||
51 | using Item = TItem; | ||
52 | |||
53 | 7 | static constexpr inline IterValue<TItem> nextBack(Self& self) { | |
54 |
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7 | auto item = ChainInputIterator::nextBack(self.input); |
55 |
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19 | return item.template map<Item>([](auto&& item) { return static_cast<Item>(item); }); |
56 | } | ||
57 | }; | ||
58 | /** @private */ | ||
59 | template<CXXIterExactSizeIterator TChainInput, typename TItem> | ||
60 | struct trait::ExactSizeIterator<op::Caster<TChainInput, TItem>> { | ||
61 | static constexpr inline size_t size(const op::Caster<TChainInput, TItem>& self) { return trait::ExactSizeIterator<TChainInput>::size(self.input); } | ||
62 | }; | ||
63 | |||
64 | } | ||
65 |