std::experimental::simd<T,Abi>::operator[]
来自cppreference.com
< cpp | experimental | simd | simd
| reference operator[]( std::size_t i ); |
(1) | (并行 TS v2) |
| value_type operator[]( std::size_t i ) const; |
(2) | (并行 TS v2) |
The subscript operators allow reading and writing single elements of a simd.
1) Returns a reference proxy to the i-th element. This proxy type should not be captured into an lvalue. Lvalues of
simd::reference can only convert to value_type. Rvalues of simd::reference overload assignment and all compound assignment operators as well as swap.2) 返回第 i 个元素的纯右值。In contrast to containers, which contain objects of type
value_type, a simd is not a container of individual objects and therefore cannot return an lvalue-reference.[编辑] 参数
| i | - | 元素索引。要求其小于 size() |
[编辑] 示例
运行此代码
#include <cstddef> #include <cstdint> #include <experimental/simd> #include <iostream> namespace stdx = std::experimental; int main() { const stdx::native_simd<std::int64_t> a = 3; for (std::size_t i = 0; i != a.size(); ++i) std::cout << a[i] << ' '; std::cout << '\n'; }
可能的输出：
3 3 3 3 3 3 3 3
