unary_negate (STL/CLR)

Article
06/05/2017

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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

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