template< class T > class indirect_array;
std::indirect_array is a helper template used by the valarray subscript operator with std::valarray<std::size_t> argument. It has reference semantics to a subset of the array whose indices specified by the std::valarray<std::size_t> object.
value_type T [edit] Member functions [edit] Example
#include <iostream>
#include <valarray>
int main()
{
std::valarray<int> data{0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
std::valarray<std::size_t> idx{0, 2, 4, 6, 8};
std::cout << "Original valarray: ";
for (int n : data)
std::cout << n << ' ';
std::cout << '\n';
data[idx] += data[idx]; // double the values at indices 'idx'
// the type of data[idx] is std::indirect_array<int>
std::cout << "After indirect modification: ";
for (int n : data)
std::cout << n << ' ';
std::cout << '\n';
}
Output:
Original valarray: 0 1 2 3 4 5 6 7 8 9 After indirect modification: 0 1 4 3 8 5 12 7 16 9
RetroSearch is an open source project built by @garambo | Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.4