thrust::maximum

template<typename T = void> struct maximum : public cuda::maximum<void>

maximum is a function object that takes two arguments and returns the greater of the two. Specifically, it is an Adaptable Binary Function. If f is an object of class maximum<T> and x and y are objects of class T f(x,y) returns x if x > y and y, otherwise.

The following code snippet demonstrates that maximum returns its greater argument.

#include <thrust/functional.h>
#include <assert.h>
...
int x =  137;
int y = -137;
thrust::maximum<int> mx;
assert(x == mx(x,y));