GPy/GPy/kern/sympy_helpers.cpp

#include <math.h>
double DiracDelta(double x){
    if((x<0.000001) & (x>-0.000001))//go on, laught at my c++ skills
        return 1.0;
    else
        return 0.0;
};
double DiracDelta(double x,int foo){
    return 0.0;
};