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#import "OFOutOfRangeException.h"
static struct {
Class isa;
} placeholder;
@interface OFMutableDataPlaceholder: OFMutableData
@interface OFPlaceholderMutableData: OFMutableData
@end
@implementation OFMutableDataPlaceholder
@implementation OFPlaceholderMutableData
- (instancetype)init
{
return (id)[[OFConcreteMutableData alloc] init];
}
- (instancetype)initWithItemSize: (size_t)itemSize
{
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@end
@implementation OFMutableData
+ (void)initialize
{
if (self == [OFMutableData class])
object_setClass((id)&placeholder,
[OFMutableDataPlaceholder class]);
[OFPlaceholderMutableData class]);
}
+ (instancetype)alloc
{
if (self == [OFMutableData class])
return (id)&placeholder;
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