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