logical_not (STL/CLR)

The latest version of this topic can be found at logical_not (STL/CLR).

The template class describes a functor that, when called, returns true only if either its argument tests as false. You use it specify a function object in terms of its argument type.

Syntax

template<typename Arg>  
    ref class logical_not  
    { // wrap operator()  
public:  
    typedef Arg argument_type;  
    typedef bool result_type;  
    typedef Microsoft::VisualC::StlClr::UnaryDelegate<  
        argument_type, result_type>  
        delegate_type;  
  
    logical_not();  
    logical_not(logical_not<Arg> %right);  
  
    result_type operator()(argument_type left);  
    operator delegate_type^();  
    };  

Parameters

Arg
The type of the arguments.

Member Functions

Remarks

The template class describes a one-argument functor. It defines the member operator operator() so that, when the object is called as a function, it returns true only if its argument tests as false.

You can also pass the object as a function argument whose type is delegate_type^ and it will be converted appropriately.

Example

// cliext_logical_not.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::transform(c1.begin(), c1.begin() + 2,   
        c3.begin(), cliext::logical_not<int>());   
    for each (int elem in c3)   
        System::Console::Write(" {0}", elem);   
    System::Console::WriteLine();   
    return (0);   
    }  
  

4 0  
0 1  

Requirements

Header: <cliext/functional>

Namespace: cliext

See Also

negate (STL/CLR)