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util/DereferenceIterator: add `constexpr`

This commit is contained in:
Max Kellermann 2024-07-10 20:10:52 +02:00
parent 0cc9ef0aee
commit fe66cde616
1 changed files with 12 additions and 12 deletions
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24
src/util/DereferenceIterator.hxx
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@ -24,60 +24,60 @@ public:
using pointer = VT *;
using reference = VT &;
DereferenceIterator() = default;
constexpr DereferenceIterator() = default;
constexpr DereferenceIterator(const IT _original) noexcept
:original(_original) {}
reference operator*() const noexcept {
constexpr reference operator*() const noexcept {
return static_cast<reference>(**original);
}
pointer operator->() const noexcept {
constexpr pointer operator->() const noexcept {
return static_cast<pointer>(&**original);
}
auto &operator++() noexcept {
constexpr auto &operator++() noexcept {
++original;
return *this;
}
auto operator++(int) noexcept {
constexpr auto operator++(int) noexcept {
auto old = *this;
original++;
return old;
}
auto &operator+=(difference_type n) noexcept {
constexpr auto &operator+=(difference_type n) noexcept {
original += n;
return *this;
}
auto &operator+(difference_type n) const noexcept {
constexpr auto &operator+(difference_type n) const noexcept {
return original + n;
}
auto &operator--() noexcept {
constexpr auto &operator--() noexcept {
original = --original;
return *this;
}
auto operator--(int) noexcept {
constexpr auto operator--(int) noexcept {
auto old = *this;
original--;
return old;
}
auto &operator-=(difference_type n) noexcept {
constexpr auto &operator-=(difference_type n) noexcept {
original -= n;
return *this;
}
auto &operator-(difference_type n) const noexcept {
constexpr auto &operator-(difference_type n) const noexcept {
return original - n;
}
bool operator==(const DereferenceIterator<IT,VT> &other) const noexcept {
constexpr bool operator==(const DereferenceIterator<IT,VT> &other) const noexcept {
return original == other.original;
}
};