Common mathematical functions | |||||||||||||||||||||||||||||||
Mathematical special functions(C++17) | |||||||||||||||||||||||||||||||
Mathematical constants(C++20) | |||||||||||||||||||||||||||||||
Basic linear algebra algorithms(C++26) | |||||||||||||||||||||||||||||||
Data-parallel types (SIMD)(C++26) | |||||||||||||||||||||||||||||||
Floating-point environment(C++11) | |||||||||||||||||||||||||||||||
Complex numbers | |||||||||||||||||||||||||||||||
Numeric array (valarray ) | |||||||||||||||||||||||||||||||
Pseudo-random number generation | |||||||||||||||||||||||||||||||
Bit manipulation(C++20) | |||||||||||||||||||||||||||||||
Saturation arithmetic(C++26) | |||||||||||||||||||||||||||||||
Factor operations | |||||||||||||||||||||||||||||||
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Interpolations | |||||||||||||||||||||||||||||||
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Generic numeric operations | |||||||||||||||||||||||||||||||
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C-style checked integer arithmetic | |||||||||||||||||||||||||||||||
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Member functions | ||||
Defined in header <valarray> | ||
template<class T>class mask_array; | ||
std::mask_array
is a helper template used by thevalarray subscript operator withstd::valarray<bool> argument. It has reference semantics and provides access to the subset of the valarray consisting of the elements whose indices correspond totrue values in thestd::valarray<bool> mask.
Contents |
Type | Definition |
value_type | T |
constructs amask_array (public member function)[edit] | |
destroys amask_array (public member function)[edit] | |
assigns contents (public member function)[edit] | |
performs arithmetic operation on the array referred by mask. (public member function)[edit] |
#include <iostream>#include <valarray> void println(auto rem,constauto& data){for(std::cout<< rem;int n: data)std::cout<< n<<' ';std::cout<<'\n';} int main(){std::valarray<int> data{0,1,2,3,4,5,6,7,8,9}; println("Initial valarray: ", data); data[data>5]=-1;// the type of data>5 is std::valarray<bool>// the type of data[data>5] is std::mask_array<int> println("After v[v>5]=-1: ", data);}
Output:
Initial valarray: 0 1 2 3 4 5 6 7 8 9After v[v>5]=-1: 0 1 2 3 4 5 -1 -1 -1 -1
(C++26) | convenience alias template forbasic_simd_mask that can specify its width(alias template)[edit] |
(parallelism TS v2) | data-parallel type with the element type bool (class template)[edit] |