Template Struct project1st

• Defined in File functional.h

Struct Documentation

template<typename T1, typename T2>
struct project1st

project1st is a function object that takes two arguments and returns its first argument; the second argument is unused. It is essentially a generalization of identity to the case of a Binary Function.

#include <thrust/functional.h>
#include <assert.h>
...
int x =  137;
int y = -137;
thrust::project1st<int> pj1;
assert(x == pj1(x,y));

See

identity

See

project2nd

See

binary_function

Public Types

typedef first_argument_type

The type of the function object’s first argument.

typedef second_argument_type

The type of the function object’s second argument.

typedef result_type

The type of the function object’s result;.

Public Functions

__host__ __device__ const T1& thrust::project1st::operator()(const T1 & lhs, const T2 &) const

Function call operator. The return value is lhs.