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deepCopy is instantiated when its corresponding type is instantiated

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This commit is contained in:
Araq 2014-09-26 09:36:09 +02:00
commit 1088814e56
10 changed files with 87 additions and 15 deletions
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18
lib/system/deepcopy.nim
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@ -82,17 +82,16 @@ proc genericDeepCopyAux(dest, src: pointer, mt: PNimType) =
genericDeepCopyAux(cast[pointer](d +% i*% mt.base.size),
cast[pointer](s +% i*% mt.base.size), mt.base)
of tyRef:
if mt.base.deepcopy != nil:
let z = mt.base.deepcopy(cast[PPointer](src)[])
let s2 = cast[PPointer](src)[]
if s2 == nil:
unsureAsgnRef(cast[PPointer](dest), s2)
elif mt.base.deepcopy != nil:
let z = mt.base.deepcopy(s2)
unsureAsgnRef(cast[PPointer](dest), z)
else:
# we modify the header of the cell temporarily; instead of the type
# field we store a forwarding pointer. XXX This is bad when the cloning
# fails due to OOM etc.
let s2 = cast[PPointer](src)[]
if s2 == nil:
unsureAsgnRef(cast[PPointer](dest), s2)
return
when declared(usrToCell):
# unfortunately we only have cycle detection for our native GCs.
let x = usrToCell(s2)
@ -116,10 +115,11 @@ proc genericDeepCopyAux(dest, src: pointer, mt: PNimType) =
genericDeepCopyAux(z, s2, realType.base)
of tyPtr:
# no cycle check here, but also not really required
if mt.base.deepcopy != nil:
cast[PPointer](dest)[] = mt.base.deepcopy(cast[PPointer](s)[])
let s2 = cast[PPointer](src)[]
if s2 != nil and mt.base.deepcopy != nil:
cast[PPointer](dest)[] = mt.base.deepcopy(s2)
else:
cast[PPointer](dest)[] = cast[PPointer](s)[]
cast[PPointer](dest)[] = s2
else:
copyMem(dest, src, mt.size)