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[ox/std] Add Span type

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This commit is contained in:
Gary Talent
2023-09-16 18:32:06 -05:00
parent b6f86551e9
commit 206b2825c8
4 changed files with 252 additions and 207 deletions
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103
deps/ox/src/ox/std/vector.hpp vendored
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@@ -131,108 +131,7 @@ class Vector: detail::VectorAllocator<T, Allocator, SmallVectorSize> {
using size_type = std::size_t;
template<typename RefType = T&, typename PtrType = T*, bool reverse = false>
struct iterator: public Iterator<std::bidirectional_iterator_tag, T> {
private:
PtrType m_t = nullptr;
size_type m_offset = 0;
size_type m_max = 0;
public:
constexpr iterator() noexcept = default;
constexpr iterator(PtrType t, size_type offset, size_type max) noexcept {
m_t = t;
m_offset = offset;
m_max = max;
}
constexpr auto offset() const noexcept {
return m_offset;
}
constexpr iterator operator+(size_type s) const noexcept {
if constexpr(reverse) {
return iterator(m_t, max<size_type>(m_offset - s, 0), m_max);
} else {
return iterator(m_t, min<size_type>(m_offset + s, m_max), m_max);
}
}
constexpr auto operator-(const iterator &other) const noexcept {
if constexpr(reverse) {
return m_offset + other.m_offset;
} else {
return m_offset - other.m_offset;
}
}
constexpr iterator operator-(size_type s) const noexcept {
if constexpr(reverse) {
return iterator(m_t, min<size_type>(m_offset + s, m_max), m_max);
} else {
return iterator(m_t, max<size_type>(m_offset - s, 0), m_max);
}
}
constexpr iterator &operator+=(size_type s) noexcept {
if constexpr(reverse) {
m_offset = max<size_type>(m_offset - s, 0);
} else {
m_offset = min(m_offset + s, m_max);
}
return *this;
}
constexpr iterator &operator-=(size_type s) noexcept {
if constexpr(reverse) {
m_offset = min(m_offset + s, m_max);
} else {
m_offset = max<size_type>(m_offset - s, 0);
}
return *this;
}
constexpr iterator &operator++() noexcept {
return operator+=(1);
}
constexpr iterator &operator--() noexcept {
return operator-=(1);
}
constexpr RefType operator*() const noexcept {
return m_t[m_offset];
}
constexpr RefType operator[](size_type s) const noexcept {
return m_t[s];
}
constexpr bool operator<(const iterator &other) const noexcept {
return m_offset < other.m_offset;
}
constexpr bool operator>(const iterator &other) const noexcept {
return m_offset > other.m_offset;
}
constexpr bool operator<=(const iterator &other) const noexcept {
return m_offset <= other.m_offset;
}
constexpr bool operator>=(const iterator &other) const noexcept {
return m_offset >= other.m_offset;
}
constexpr bool operator==(const iterator &other) const noexcept {
return m_t == other.m_t && m_offset == other.m_offset && m_max == other.m_max;
}
constexpr bool operator!=(const iterator &other) const noexcept {
return m_t != other.m_t || m_offset != other.m_offset || m_max != other.m_max;
}
};
using iterator = SpanIterator<T, RefType, PtrType, reverse>;
private:
static constexpr auto initialCap = SmallVectorSize > 0 ? SmallVectorSize : 50;