Mojo module
arc
Pointer-counted smart pointers.
Example usage:
from memory import ArcPointer
var p = ArcPointer(4)
var p2 = p
p2[]=3
print(3 == p[])
from memory import ArcPointer
var p = ArcPointer(4)
var p2 = p
p2[]=3
print(3 == p[])
Subscripting([]) is done by Pointer,
in order to ensure that the underlying ArcPointer outlive the operation.
It is highly DISCOURAGED to manipulate an ArcPointer through UnsafePointer.
Mojo's ASAP deletion policy ensure values are destroyed at last use.
Do not unsafely dereference the ArcPointer inner UnsafePointer field.
See Lifecycle.
# Illustration of what NOT to do, in order to understand:
print(ArcPointer(String("ok"))._inner[].payload)
#........................^ASAP ^already freed
# Illustration of what NOT to do, in order to understand:
print(ArcPointer(String("ok"))._inner[].payload)
#........................^ASAP ^already freed
Always use Pointer subscripting ([]):
print(ArcPointer(String("ok"))[])
print(ArcPointer(String("ok"))[])
Structs
-
ArcPointer: Atomic reference-counted pointer.
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