Clang 4.0

Objective-C

Last updated at 2012-12-26Posted at 2012-11-26

Clang 4.0以降から変態的文法が増えてる気配なのでメモ

全ては追い切れないので、象徴的なものだけ抜粋

Literal

NSString以外にもリテラルが使えるようになる

NSNumber

NSNumber *number;
number = [NSNumber numberWithChar:'X'];
number = [NSNumber numberWithInt:12345];
number = [NSNumber numberWithUnsignedLong:12345ul];
number = [NSNumber numberWithLongLong:12345ll];
number = [NSNumber numberWithFloat:123.45f];
number = [NSNumber numberWithDouble:123.45];
number = [NSNumber numberWithBool:YES];

NSNumber *number;
number = @'X';
number = @12345;
number = @12345ul;
number = @12345ll;
number = @123.45f;
number = @123.45;
number = @YES;

NSArray

array = [NSArray arrayWithObjects:a, b, c, nil];

array = @[ a, b, c ];

NSDictionary

dict = [NSDictionary dictionaryWithObjects:@[o1, o2, o3]
                                   forKeys:@[k1, k2, k3]];

dict = @{ k1 : o1, k2 : o2, k3 : o3 };

取得側も変更有り

arr[@1]      === [arr objectAtIndex:1]
dict[@1]     === [dict objectAtIndex:1]
dict[@"key"] === [dict objectForKey:@"key"]

lambda

C++11 から Block のような文法をサポート

  NSArray *array = @[
	@"string 1", @"string 21", @"string 12", @"String 11",
	@"String 02"]; //"

  const NSStringCompareOptions comparisonOptions =
		NSCaseInsensitiveSearch | NSNumericSearch |
		NSWidthInsensitiveSearch | NSForcedOrderingSearch;
  NSLocale *currentLocale = [NSLocale currentLocale];
  NSArray *sorted =
	[array sortedArrayUsingComparator:[=](id s1, id s2) ->
		NSComparisonResult {
               NSRange string1Range = NSMakeRange(0, [s1 length]);
               return [s1 compare:s2 options:comparisonOptions 
                          range:string1Range locale:currentLocale];
       }];
  NSLog(@"sorted: %@", sorted);

参考

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