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hash_set::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 hash_set::size (STL/CLR)() == 0. You use it to test whether the hash_set is empty.

Example

// cliext_hash_set_empty.cpp 
// compile with: /clr 
#include <cliext/hash_set> 
 
typedef cliext::hash_set<wchar_t> Myhash_set; 
int main() 
    { 
    Myhash_set c1; 
    c1.insert(L'a'); 
    c1.insert(L'b'); 
    c1.insert(L'c'); 
 
// display initial contents " a b c" 
    for each (wchar_t elem in c1) 
        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.clear(); 
    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

Requirements

Header: <cliext/hash_set>

Namespace: cliext

See Also

Reference

hash_set (STL/CLR)

hash_set::size (STL/CLR)