priority_queue::empty (STL/CLR)

Tests whether no elements are present.

    bool empty();

Remarks

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

Example

// cliext_priority_queue_empty.cpp 
// compile with: /clr 
#include <cliext/queue> 
 
typedef cliext::priority_queue<wchar_t> Mypriority_queue; 
int main() 
    { 
    Mypriority_queue 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); 
    } 
 

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

Requirements

Header: <cliext/queue>

Namespace: cliext

See Also

Reference

priority_queue (STL/CLR)

priority_queue::size (STL/CLR)