32 lines
735 B
C++
32 lines
735 B
C++
#pragma once
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#include "utils/total_ordering.hpp"
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// Represents number of to be returned elements from iterator. Where acutal
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// number is probably somwhere in [min,max].
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class Count : public TotalOrdering<Count>
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{
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public:
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Count(size_t exact) : min(exact), max(exact) {}
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Count(size_t min, size_t max) : min(min), max(max) {}
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Count min_zero() const { return Count(0, max); }
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size_t avg() const { return ((max - min) >> 1) + min; }
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friend constexpr bool operator<(const Count &lhs, const Count &rhs)
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{
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return lhs.avg() < rhs.avg();
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}
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friend constexpr bool operator==(const Count &lhs, const Count &rhs)
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{
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return lhs.avg() == rhs.avg();
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}
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size_t min;
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size_t max;
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};
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