Disposable
A disposing mechanism like IDisposable in C#, and using guard like using statement in C#.
Examples
class DisposableInt : Disposable
{
private int v;
private bool disposed;
this(int t) { this.v = t; }
/// Destructor must call `dispose` with `disposing = false` in its body
~this() { this.dispose(false); }
override nothrow void dispose() { this.dispose(true); }
nothrow void dispose(bool disposing)
{
assert(this.disposed != disposing);
this.disposed = true;
}
}
mixin(using!q{ auto p = new DisposableInt(2) });
static assert(is(typeof(p) == DisposableInt));
mixin(using!q{ DisposableInt di = new DisposableInt(2) });
mixin(using!q{ d2 = new DisposableInt(2) });
static assert(is(typeof(di) == DisposableInt));
static assert(is(typeof(d2) == DisposableInt));Provided classes/methods
-
interface Disposable- A
Disposableinterface that can be disposed by callingdisposemethod -
nothrow void dispose()- Disposes unmanaged objects(OpenGL Objects, Win32 Objects...) in the object.
- A
-
string using(string)() {...}- The
usingstatement emulation. - Passes a variable declaration statement as string(using
q{...}is preferred) to declare a variable and to insert a code such asscope(exit) {varname}.dispose(); - If you want a type which is inferred, you can omit
auto.
- The
