Function

objc_enumerationMutation

Inserted by the compiler when a mutation is detected during a foreach iteration.

Declaration

void objc_enumerationMutation(id obj);

Parameters

obj

The object being mutated.

Discussion

The compiler inserts this function when it detects that an object is mutated during a foreach iteration. The function is called when a mutation occurs, and the enumeration mutation handler is enacted if it is set up (via the objc_setEnumerationMutationHandler function). If the handler is not set up, a fatal error occurs.

See Also

Using Objective-C Language Features

objc_setEnumerationMutationHandler

Sets the current mutation handler.

imp_implementationWithBlock

Creates a pointer to a function that calls the specified block when the method is called.

imp_getBlock

Returns the block associated with an IMP that was created using imp_implementationWithBlock.

imp_removeBlock

Disassociates a block from an IMP that was created using imp_implementationWithBlock, and releases the copy of the block that was created.

objc_loadWeak

Loads the object referenced by a weak pointer and returns it.

objc_storeWeak

Stores a new value in a __weak variable.