| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | #pragma once | ||
| 2 | |||
| 3 | #include "../Common.h" | ||
| 4 | #include "../util/TraitImpl.h" | ||
| 5 | |||
| 6 | namespace CXXIter { | ||
| 7 | |||
| 8 | // ################################################################################################ | ||
| 9 | // FILTERMAP | ||
| 10 | // ################################################################################################ | ||
| 11 | namespace op { | ||
| 12 | /** @private */ | ||
| 13 | template<typename TChainInput, typename TFilterMapFn, typename TItem> | ||
| 14 | class [[nodiscard(CXXITER_CHAINER_NODISCARD_WARNING)]] FilterMap : public IterApi<FilterMap<TChainInput, TFilterMapFn, TItem>> { | ||
| 15 | friend struct trait::Iterator<FilterMap<TChainInput, TFilterMapFn, TItem>>; | ||
| 16 | friend struct trait::DoubleEndedIterator<FilterMap<TChainInput, TFilterMapFn, TItem>>; | ||
| 17 | private: | ||
| 18 | TChainInput input; | ||
| 19 | TFilterMapFn filterMapFn; | ||
| 20 | public: | ||
| 21 | 22 | constexpr FilterMap(TChainInput&& input, TFilterMapFn filterMapFn) : input(std::move(input)), filterMapFn(filterMapFn) {} | |
| 22 | }; | ||
| 23 | } | ||
| 24 | // ------------------------------------------------------------------------------------------------ | ||
| 25 | /** @private */ | ||
| 26 | template<typename TChainInput, typename TFilterMapFn, typename TItem> | ||
| 27 | struct trait::Iterator<op::FilterMap<TChainInput, TFilterMapFn, TItem>> { | ||
| 28 | using ChainInputIterator = trait::Iterator<TChainInput>; | ||
| 29 | using InputItem = typename TChainInput::Item; | ||
| 30 | // CXXIter Interface | ||
| 31 | using Self = op::FilterMap<TChainInput, TFilterMapFn, TItem>; | ||
| 32 | using Item = TItem; | ||
| 33 | |||
| 34 | 79 | static constexpr inline IterValue<Item> next(Self& self) { | |
| 35 |
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42 | while(true) { |
| 36 |
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79 | auto item = ChainInputIterator::next(self.input); |
| 37 |
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109 | if(!item.has_value()) [[unlikely]] { return {}; } |
| 38 |
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60 | std::optional<Item> value(self.filterMapFn(std::forward<InputItem>( item.value() ))); |
| 39 |
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60 | if(!value) { continue; } |
| 40 |
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34 | return *value; |
| 41 | } | ||
| 42 | } | ||
| 43 | 8 | static constexpr inline SizeHint sizeHint(const Self& self) { | |
| 44 | 8 | SizeHint input = ChainInputIterator::sizeHint(self.input); | |
| 45 | 16 | return SizeHint(0, input.upperBound); | |
| 46 | } | ||
| 47 | 1 | static constexpr inline size_t advanceBy(Self& self, size_t n) { return util::advanceByPull(self, n); } | |
| 48 | }; | ||
| 49 | /** @private */ | ||
| 50 | template<CXXIterDoubleEndedIterator TChainInput, typename TFilterMapFn, typename TItem> | ||
| 51 | struct trait::DoubleEndedIterator<op::FilterMap<TChainInput, TFilterMapFn, TItem>> { | ||
| 52 | using ChainInputIterator = trait::DoubleEndedIterator<TChainInput>; | ||
| 53 | using InputItem = typename TChainInput::Item; | ||
| 54 | // CXXIter Interface | ||
| 55 | using Self = op::FilterMap<TChainInput, TFilterMapFn, TItem>; | ||
| 56 | using Item = TItem; | ||
| 57 | |||
| 58 | 10 | static constexpr inline IterValue<Item> nextBack(Self& self) { | |
| 59 | 3 | while(true) { | |
| 60 | 10 | auto item = ChainInputIterator::nextBack(self.input); | |
| 61 | 15 | if(!item.has_value()) [[unlikely]] { return {}; } | |
| 62 | 8 | std::optional<Item> value(self.filterMapFn(std::forward<InputItem>( item.value() ))); | |
| 63 | 8 | if(!value) { continue; } | |
| 64 | 5 | return *value; | |
| 65 | } | ||
| 66 | } | ||
| 67 | }; | ||
| 68 | |||
| 69 | } | ||
| 70 |