binder1st (STL/CLR)
The template class describes a one-argument functor that, when called, returns its stored two-argument functor called with its stored first argument and the supplied second argument. You use it specify a function object in terms of its stored functor.
template<typename Fun>
ref class binder1st
{ // wrap operator()
public:
typedef Fun stored_function_type;
typedef typename Fun::first_argument_type first_argument_type;
typedef typename Fun::second_argument_type second_argument_type;
typedef typename Fun:result_type result_type;
typedef Microsoft::VisualC::StlClr::UnaryDelegate<
second_argument_type, result_type>
delegate_type;
binder1st(Fun% functor, first_argument_type left);
binder1st(binder1st<Arg>% right);
result_type operator()(second_argument_type right);
operator delegate_type^();
};
Parameters
- Fun
The type of the stored functor.
Member Functions
Type Definition |
Description |
|---|---|
delegate_type |
The type of the generic delegate. |
first_argument_type |
The type of the functor first argument. |
result_type |
The type of the functor result. |
second_argument_type |
The type of the functor second argument. |
stored_function_type |
The type of the functor. |
Member |
Description |
|---|---|
binder1st |
Constructs the functor. |
Operator |
Description |
|---|---|
operator() |
Computes the desired function. |
operator delegate_type^() |
Casts the functor to a delegate. |
Remarks
The template class describes a one-argument functor that stores a two-argument functor and a first argument. It defines the member operator operator() so that, when the object is called as a function, it returns the result of calling the stored functor with the stored first argument and the supplied second argument.
You can also pass the object as a function argument whose type is delegate_type^ and it will be converted appropriately.
Example
// cliext_binder1st.cpp
// compile with: /clr
#include <cliext/algorithm>
#include <cliext/functional>
#include <cliext/vector>
typedef cliext::vector<int> Myvector;
int main()
{
Myvector c1;
c1.push_back(4);
c1.push_back(3);
Myvector c3(2, 0);
// display initial contents " 4 3"
for each (int elem in c1)
System::Console::Write(" {0}", elem);
System::Console::WriteLine();
// transform and display
cliext::minus<int> sub_op;
cliext::binder1st<cliext::minus<int> > subfrom3(sub_op, 3);
cliext::transform(c1.begin(), c1.begin() + 2, c3.begin(),
subfrom3);
for each (int elem in c3)
System::Console::Write(" {0}", elem);
System::Console::WriteLine();
// transform and display with function
cliext::transform(c1.begin(), c1.begin() + 2, c3.begin(),
bind1st(sub_op, 3));
for each (int elem in c3)
System::Console::Write(" {0}", elem);
System::Console::WriteLine();
return (0);
}
4 3 -1 0 -1 0
Requirements
Header: <cliext/functional>
Namespace: cliext