queue::empty (STL/CLR)

 

For the latest documentation on Visual Studio 2017 RC, see Visual Studio 2017 RC Documentation.

Tests whether no elements are present.

bool empty();  

The member function returns true for an empty controlled sequence. It is equivalent to queue::size (STL/CLR)() == 0. You use it to test whether the queue is empty.

// cliext_queue_empty.cpp   
// compile with: /clr   
#include <cliext/queue>   
  
typedef cliext::queue<wchar_t> Myqueue;   
int main()   
    {   
    Myqueue c1;   
    c1.push(L'a');   
    c1.push(L'b');   
    c1.push(L'c');   
  
// display initial contents " a b c"   
    for each (wchar_t elem in c1.get_container())   
        System::Console::Write(" {0}", elem);   
    System::Console::WriteLine();   
    System::Console::WriteLine("size() = {0}", c1.size());   
    System::Console::WriteLine("empty() = {0}", c1.empty());   
  
// clear the container and reinspect   
    c1.pop();   
    c1.pop();   
    c1.pop();   
    System::Console::WriteLine("size() = {0}", c1.size());   
    System::Console::WriteLine("empty() = {0}", c1.empty());   
    return (0);   
    }  
  

 a b c  
size() = 3  
empty() = False  
size() = 0  
empty() = True  

Header: <cliext/queue>

Namespace: cliext

queue (STL/CLR)
queue::size (STL/CLR)

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