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add nth(), index_of() container member functions

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bolero-MURAKAMI 2015-03-19 23:43:13 +09:00
parent ee008e8a77
commit 6a9cda9d4c
3 changed files with 99 additions and 0 deletions
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40
sprout/array/array.hpp
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@ -216,6 +216,46 @@ namespace sprout {
throw std::out_of_range("array<>: index out of range");
}
}
#if SPROUT_USE_INDEX_ITERATOR_IMPLEMENTATION
SPROUT_CXX14_CONSTEXPR iterator nth(size_type i) {
return i < size()
? iterator(*this, i)
: (throw std::out_of_range("array<>: index out of range"), iterator())
;
}
SPROUT_CONSTEXPR const_iterator nth(size_type i) const {
return i < size()
? const_iterator(*this, i)
: (throw std::out_of_range("array<>: index out of range"), const_iterator())
;
}
SPROUT_CONSTEXPR size_type index_of(iterator p) const SPROUT_NOEXCEPT {
return p.index();
}
SPROUT_CONSTEXPR size_type index_of(const_iterator p) const SPROUT_NOEXCEPT {
return p.index();
}
#else
SPROUT_CXX14_CONSTEXPR iterator nth(size_type i) {
return i < size()
? iterator(elems) + i
: (throw std::out_of_range("array<>: index out of range"), iterator())
;
}
SPROUT_CONSTEXPR const_iterator nth(size_type i) const {
return i < size()
? const_iterator(elems) + i
: (throw std::out_of_range("array<>: index out of range"), const_iterator())
;
}
SPROUT_CONSTEXPR size_type index_of(iterator p) const SPROUT_NOEXCEPT {
return sprout::distance(begin(), p);
}
SPROUT_CONSTEXPR size_type index_of(const_iterator p) const SPROUT_NOEXCEPT {
return sprout::distance(begin(), p);
}
#endif
};
template<typename T, std::size_t N>
SPROUT_CONSTEXPR_OR_CONST typename sprout::array<T, N>::size_type sprout::array<T, N>::static_size;