Objective-Potter

ObjectivePotter.mm

HWWand *wand = [[HWWand alloc] init];
HWMagic *magic = [HWSpell genericSpell];

[wand setMagic:(__bridge HWSpell *)magic];

HWStudent *ron = [[HWStudent alloc] init];
[ron equipWand:wand];
[ron beginLearning:(__bridge HWWandSpell *)magic];

[ron castSpell:(__bridge HWWandSpell *)magic];

Shouldn't Ron simply setMagic:? The cast is implicit.

- (BOOL)equipWand:(HWWand *)wand; // The wand chooses the wizard.

UIWaveGestureRecognizer *waveRecognizer = 
    [[UIWaveGestureRecognizer alloc] initWithTarget:wizardWorld action:@selector:(vanquishEvil)];
[wand addGestureRecognizer:waveRecognizer];

HWWandSpell *harrySpell = [HWWandSpell expelliarmus];
HWWandSpell *voldemortSpell = [HWWandSpell avadaKedavra];

HWSpellComparisonResult spellResult = [harrySpell evaluateSpellVersusSpell:voldemortSpell withSpellComparator:(^HWSpellComparator)(id spell1, id spell2) ^{
if ([spell1.wizard.wand == nil])
    return HWSpellResultLose;
if ([spell1.wizard isKindOfClass:[[HWCreature houseElf] class]])
    return HWSpellResultWin;
if ([spell1.wizard containsSoulFragmentOfWizard:spell2.wizard]) 
    return HWSpellResultWin;
if ([spell2.wizard.power > spell1.wizard.power])
    return HWSpellResultLose;

return HWSpellResultDraw;
}];