hash_set::clear (STL/CLR)

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

Removes all elements.

Syntax

void clear();  

Remarks

The member function effectively calls hash_set::erase (STL/CLR)( hash_set::begin (STL/CLR)(), hash_set::end (STL/CLR)()). You use it to ensure that the controlled sequence is empty.

Example

// cliext_hash_set_clear.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();   
  
// clear the container and reinspect   
    c1.clear();   
    System::Console::WriteLine("size() = {0}", c1.size());   
  
// add elements and clear again   
    c1.insert(L'a');   
    c1.insert(L'b');   
  
    for each (wchar_t elem in c1)   
        System::Console::Write(" {0}", elem);   
    System::Console::WriteLine();   
    c1.clear();   
    System::Console::WriteLine("size() = {0}", c1.size());   
    return (0);   
    }  
  

 a b c  
size
() = 0  
 a b  
size
() = 0  

Requirements

Header: <cliext/hash_set>

Namespace: cliext

See Also

hash_set (STL/CLR)
hash_set::erase (STL/CLR)