| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | #pragma once | ||
| 2 | |||
| 3 | #include <cstdlib> | ||
| 4 | #include <optional> | ||
| 5 | |||
| 6 | #include "../Common.h" | ||
| 7 | #include "../util/TraitImpl.h" | ||
| 8 | |||
| 9 | namespace CXXIter { | ||
| 10 | |||
| 11 | // ################################################################################################ | ||
| 12 | // SKIP WHILE | ||
| 13 | // ################################################################################################ | ||
| 14 | namespace op { | ||
| 15 | /** @private */ | ||
| 16 | template<typename TChainInput, typename TSkipPredicate> | ||
| 17 | class [[nodiscard(CXXITER_CHAINER_NODISCARD_WARNING)]] SkipWhile : public IterApi<SkipWhile<TChainInput, TSkipPredicate>> { | ||
| 18 | friend struct trait::Iterator<SkipWhile<TChainInput, TSkipPredicate>>; | ||
| 19 | private: | ||
| 20 | TChainInput input; | ||
| 21 | TSkipPredicate skipPredicate; | ||
| 22 | bool skipEnded = false; | ||
| 23 | public: | ||
| 24 | 28 | constexpr SkipWhile(TChainInput&& input, TSkipPredicate skipPredicate) : input(std::move(input)), skipPredicate(skipPredicate) {} | |
| 25 | }; | ||
| 26 | } | ||
| 27 | // ------------------------------------------------------------------------------------------------ | ||
| 28 | /** @private */ | ||
| 29 | template<typename TChainInput, typename TSkipPredicate> | ||
| 30 | struct trait::Iterator<op::SkipWhile<TChainInput, TSkipPredicate>> { | ||
| 31 | using ChainInputIterator = trait::Iterator<TChainInput>; | ||
| 32 | using InputItem = typename TChainInput::Item; | ||
| 33 | // CXXIter Interface | ||
| 34 | using Self = op::SkipWhile<TChainInput, TSkipPredicate>; | ||
| 35 | using Item = InputItem; | ||
| 36 | |||
| 37 | 37 | static constexpr inline IterValue<Item> next(Self& self) { | |
| 38 | 22 | while(true) { | |
| 39 |
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37 | auto item = ChainInputIterator::next(self.input); |
| 40 |
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49 | if(!item.has_value()) [[unlikely]] { return {}; } |
| 41 |
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34 | if(self.skipEnded) { return item; } |
| 42 |
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33 | if(!self.skipPredicate(item.value())) { |
| 43 | 11 | self.skipEnded = true; | |
| 44 | 11 | return item; | |
| 45 | } | ||
| 46 | } | ||
| 47 | } | ||
| 48 | 2 | static constexpr inline SizeHint sizeHint(const Self& self) { | |
| 49 | 2 | SizeHint input = ChainInputIterator::sizeHint(self.input); | |
| 50 | 4 | return SizeHint(0, input.upperBound); | |
| 51 | } | ||
| 52 | static constexpr inline size_t advanceBy(Self& self, size_t n) { return util::advanceByPull(self, n); } | ||
| 53 | }; | ||
| 54 | |||
| 55 | } | ||
| 56 |