std::experimental::const_where_expression

C++

Language

Headers

Freestanding and hosted implementations

Named requirements

Language support library

Concepts library (C++20)

Diagnostics library

Utilities library

Strings library

Containers library

Algorithms library

Iterators library

Numerics library

Input/output library

Localizations library

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

Filesystem library (C++17)

Technical Specifications

Extensions for parallelism v2

Parallel exceptions
exception_list
Additional execution policies
execution::vector_policy	execution::unsequenced_policy
Algorithms
induction reductionreduction_plusreduction_minusreduction_multiplies	reduction_bit_andreduction_bit_orreduction_bit_xorreduction_minreduction_max	for_loopfor_loop_stridedfor_loop_nfor_loop_n_strided
execution::no_vec
execution::ordered_update_t
Task blocks
task_block
task_cancelled_exception
define_task_blockdefine_task_block_restore_thread
Data-parallel vectors

Data-parallel vector library

Main classes
simd	simd_mask
ABI tags
simd_abi::scalar simd_abi::fixed_size	simd_abi::native simd_abi::compatible	simd_abi::max_fixed_size
Alignment tags
element_aligned_tagelement_aligned	vector_aligned_tagvector_aligned	overaligned_tagoveraligned
Where expression
where	where_expression	const_where_expression
Casts
simd_caststatic_simd_cast	to_fixed_sizeto_compatibleto_native	split concat
Algorithms
min max	minmax clamp
Reduction
hmin hmax	reduce
Mask reduction
all_ofany_ofnone_ofsome_of	popcount find_first_setfind_last_set
Traits
is_simdis_simd_v is_simd_maskis_simd_mask_v is_simd_flag_typeis_simd_flag_type_v	simd_sizesimd_size_v memory_alignmentmemory_alignment_v	is_abi_tagis_abi_tag_v abi_for_sizeabi_for_size_t
Math functions

std::experimental::const_where_expression

Template:cpp/experimental/simd/const where expression/navbar content

Defined in header <experimental/simd>
template < class M, class V > class const_where_expression;

The class template const_where_expression abstracts the notion of selected elements of a given const object of arithmetic or data-parallel type. Selected elements signifies the elements data[i] for all i {j 0 | j < M::size() mask[j]}.

Template parameters

M	-	The mask type
V	-	The value type M applies on

Valid combinations of (M, V) are: (simd_mask<T, Abi>, const simd<T, Abi>), (simd_mask<T, Abi>, const simd_mask<T, Abi>), (bool, const T).

Member functions

operator-	negates selected elements (public member function)
copy_to	stores selected elements to address (public member function)