scope(exit) considered FREAKING AWESOME

Sun Nov 8 04:40:38 PST 2009

auto var = hairilyAllocatedObject();
scope(exit) cleanupObject(var);

sock.send("<html><head></head><body>");
scope(exit) sock.send("</body></html>");

logln("Digraph D {");
scope(exit) logln("}");

SDL_LockSurface(display.surface);
scope(exit) SDL_UnlockSurface(display.surface);

auto dg = { performComplexExitCleanupDuty; };
scope(exit) dg();
....
dg = dg /apply/ (proc dg) { moreCleanup; dg(); };
....
/* Half a dozen different ways of leaving the function go here */

auto backup = var; var = newValue;
scope(exit) var = backup;