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util::span interface improvements

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This commit is contained in:
Nikita Lisitsa 2023-01-10 03:35:21 +03:00
parent 148efb02cc
commit 7376109e96
1 changed files with 27 additions and 1 deletions
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28
libs/util/include/psemek/util/span.hpp
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@ -35,6 +35,11 @@ namespace psemek::util
, p_end{end} , p_end{end}
{} {}
span(T * begin, std::size_t size)
: p_begin{begin}
, p_end{begin + size}
{}
template <std::size_t N> template <std::size_t N>
span(T (&a)[N]) span(T (&a)[N])
: p_begin{a} : p_begin{a}
@ -64,7 +69,7 @@ namespace psemek::util
T * begin() const { return p_begin; } T * begin() const { return p_begin; }
T * end() const { return p_end; } T * end() const { return p_end; }
difference_type size() const { return p_end - p_begin; } size_type size() const { return p_end - p_begin; }
bool empty() const { return p_begin == p_end; } bool empty() const { return p_begin == p_end; }
@ -74,6 +79,27 @@ namespace psemek::util
T & front() const { return *p_begin; } T & front() const { return *p_begin; }
T & back() const { return *(p_end - 1); } T & back() const { return *(p_end - 1); }
span subspan(std::size_t start, std::size_t end) const
{
return span{p_begin + start, p_begin + end};
}
span prefix(std::size_t size) const
{
return subspan(0, size);
}
span suffix(std::size_t size) const
{
return span{p_end - size, p_end};
}
span & consume(std::size_t count)
{
p_begin += count;
return *this;
}
void reset() void reset()
{ {
p_begin = nullptr; p_begin = nullptr;