unary_negate (STL/CLR)
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The latest version of this topic can be found at unary_negate (STL/CLR).
The template class describes a functor that, when called, returns the logical NOT of its stored one-argument functor. You use it specify a function object in terms of its stored functor.
Syntax
template<typename Fun>
ref class unary_negate
{ // wrap operator()
public:
typedef Fun stored_function_type;
typedef typename Fun::argument_type argument_type;
typedef bool result_type;
typedef Microsoft::VisualC::StlClr::UnaryDelegate<
argument_type, result_type>
delegate_type;
unary_negate(Fun% functor);
unary_negate(unary_negate<Fun>% right);
result_type operator()(argument_type left);
operator delegate_type^();
};
Parameters
Fun
The type of the stored functor.
Member Functions
| Type Definition | Description |
|---|---|
| argument_type | The type of the functor argument. |
| delegate_type | The type of the generic delegate. |
| result_type | The type of the functor result. |
| Member | Description |
|---|---|
| unary_negate | Constructs the functor. |
| Operator | Description |
|---|---|
| operator() | Computes the desired function. |
| delegate_type^ | Casts the functor to a delegate. |
Remarks
The template class describes a one-argument functor that stores another one-argument functor. It defines the member operator operator() so that, when the object is called as a function, it returns the logical NOT of the stored functor called with the argument.
You can also pass the object as a function argument whose type is delegate_type^ and it will be converted appropriately.
Example
// cliext_unary_negate.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(0);
Myvector c3(2, 0);
// display initial contents " 4 0"
for each (int elem in c1)
System::Console::Write(" {0}", elem);
System::Console::WriteLine();
// transform and display
cliext::logical_not<int> not_op;
cliext::transform(c1.begin(), c1.begin() + 2, c3.begin(),
cliext::unary_negate<cliext::logical_not<int> >(not_op));
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(),
cliext::not1(not_op));
for each (int elem in c3)
System::Console::Write(" {0}", elem);
System::Console::WriteLine();
return (0);
}
4 0
1 0
1 0
Requirements
Header: <cliext/functional>
Namespace: cliext