stir::detail::test_if_1d< Num_dimensions > Struct Template Reference

a templated class used to check if it's a 1D array or not This class only exists to allow a work-around for older compilers (such as VC 6.0) that do not implement partial ordering of function templates or partial template specialisation. More...

#include "stir/detail/test_if_1d.h"

Inheritance diagram for stir::detail::test_if_1d< Num_dimensions >:

Detailed Description

template<int Num_dimensions>
struct stir::detail::test_if_1d< Num_dimensions >

a templated class used to check if it's a 1D array or not This class only exists to allow a work-around for older compilers (such as VC 6.0) that do not implement partial ordering of function templates or partial template specialisation.

For modern compilers one can write

// generic case
template <int n, class T> void f(Array<n,T>&);
// 1D case
template <class T>        void f(Array<1,T>&);

The work-around is as follows

// generic case
template <int n, class T> void f_help(is_not_1d, Array<n,T>&);
// 1D case
template <class T>        void f_help(is_1d, Array<1,T>&);
// function that will dispatch
template <int n, class T> void f(Array<n,T>& a)
{ f_help(test_if_1d<n>(), a); }

So, the same effect is achieved by having one extra function. Of course, the name f_help is arbitrary, and could just as well be f. However, it's best to hide these away from the user, as they should never be used explicitly.

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The documentation for this struct was generated from the following file:

• /home/sirfuser/devel/STIRdistrib/STIR/src/include/stir/detail/test_if_1d.h