Developer Guide and Reference

Contents

index_d template function

Syntax

template<int DimensionT, typename ObjT> auto index_d(const ObjT &a_obj)
Description
The template function offers a consistent way to determine the index of a dimension for a multi-dimensional object. It can avoid extracting an entire
n_index_t<…>
when only the extent of a single dimension is needed.
Template Argument
Description
int DimensionT
0 based index starting at the leftmost dimension indicating which n-dimensions to query the index of.
Requirements:
DimensionT >=0 and DimensionT < ObjT::rank
typename ObjT
The type of n-dimensional object from which to retrieve the extent.
Requirements:
ObtT is one of:
n_index_t<…>
n_index_generator<…>
Returns
The correctly typed index corresponding to the requested DimensionT of a_obj.
Example
template <typename IndicesT> void foo(const IndicesT & a_pos) { int z = index_d<0>(a_pos); int y = index_d<1>(a_pos); int x = index_d<2>(a_pos); /… }

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804