[Insight-users] Concept checking

[David Doria]

I am trying to ensure the type that my function is instantiated with has a
certainly property. I tried this:

#include <itkConceptChecking.h>
#include <itkImage.h>
#include <itkVectorImage.h>

template <typename T>
void MyFunction(const T& image)
{
  // MyFunction should only accept types that have an operator[]
  itkConceptMacro( nameOfCheck, ( itk::Concept::BracketOperator< T> ) ); //
here, 'nameOfCheck can be anything, right?

}

int main(int, char*[])
{
  itk::VariableLengthVector<float> a;
  a[0] = 1;
  MyFunction(a);

  int b;
//   MyFunction(b);

  return EXIT_SUCCESS;
}

-----------

VariableLengthVector definitely has operator[], as shown with the
assignment a[0] = 1. However, the call to MyFunction(a) produces compiler
errors that say "no match for operator[]". Can anyone explain what I'm
doing wrong here?

Thanks,

David
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