mirror of
https://github.com/triqs/dft_tools
synced 2024-10-31 19:23:45 +01:00
41 lines
1.3 KiB
ReStructuredText
41 lines
1.3 KiB
ReStructuredText
|
|
.. highlight:: python
|
|
|
|
.. _Debug:
|
|
|
|
Bound checking and debug macros
|
|
===================================
|
|
|
|
To be fast, by default, no check are made on the indices while accessing elements or slicing.
|
|
However, checks can be activated in two ways :
|
|
|
|
* Adding the `BOUND_CHECK` option
|
|
|
|
* Defining the debug macro TRIQS_ARRAYS_ENFORCE_BOUNDCHECK, which switches the default option to `BOUND_CHECK`
|
|
for all arrays, matrices and vectors.
|
|
|
|
In both cases, if the indices are not within the domain of defintion, an exception triqs::arrays::key_error
|
|
will be thrown. It's .what() returns the file and line where the exception occurs, with the stack of all in C++,
|
|
e.g. :
|
|
|
|
.. compileblock::
|
|
|
|
#define TRIQS_ARRAYS_ENFORCE_BOUNDCHECK
|
|
#include <triqs/arrays.hpp>
|
|
using triqs::arrays::array;
|
|
int main(){
|
|
try {
|
|
array<double,2> A(2,2); A() = 3;
|
|
std::cout << A(0,3) << std::endl;
|
|
}
|
|
//catch (triqs::arrays::key_error & e) { std::cout<< e.what()<< std::endl;}
|
|
catch (std::exception & e) { std::cout<< e.what()<< std::endl;} // or like this : triqs::arrays::key_error derives from std::exception
|
|
}
|
|
|
|
|
|
.. note:: Bound Checking is not necessarly used for debugging. You may used it for a given array, catching exception.
|
|
Beware however that bound checking comes with some performance penalty.
|
|
|
|
|
|
|