Functor for deleting objects

In a destructor for a class, I had a [std::vector](http://www.cplusplus.com/reference/stl/vector/) of pointers that I wanted to delete. I started to write the usual for(;;) loop and realized I do this often enough I should make it easy to use [std::for_each()](http://www.cplusplus.com/reference/algorithm/for_each/).

Here’s the functor (based on [std::unary_function](http://www.cplusplus.com/reference/std/functional/unary_function/)):

[cc lang="cpp"]
template
struct deleter: public std::unary_function
{
bool operator()(Type * ptr) const
{
delete ptr;
return true;
}
};
[/cc]

And here’s some sample code using it:

[cc lang="cpp"]
std::vector m_symbols;
// …
std::for_each (m_symbols.begin(), m_symbols.end(), deleter());
[/cc]

I added a return of true because some other template code wasn’t happy about “return void” — supposedly something fixed in recent compilers.