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