Developer Guide and Reference

Contents

extent_d template function

Syntax

template<int DimensionT, typename ObjT> auto extent_d(const ObjT &a_obj)
Description
The template function offers a consistent way to determine the extent of a dimension for a multi-dimensional object. It can avoid extracting an entire n_extent_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 extent 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_container<…>
n_extent_t<…>
n_extent_generator<…>
Returns
The correctly typed extent corresponding to the requested DimensionT of a_obj.
Example
template <typename VolumeT> void foo(const VolumeT & a_volume) { int extent_z = extent_d<0>(volume); int extent_y = extent_d<1>(volume); int extent_x = extent_d<2>(volume); /… }

Product and Performance Information

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Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.