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ARC: implemented a simple cycle detector

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Araq 2019-11-28 09:32:14 +01:00 • committed by Andreas Rumpf
commit 2dea920379
4 changed files with 44 additions and 6 deletions
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10
compiler/lambdalifting.nim
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@ -366,13 +366,15 @@ proc createUpField(c: var DetectionPass; dest, dep: PSym; info: TLineInfo) =
if upField.typ.skipTypes({tyOwned, tyRef, tyPtr}) != fieldType.skipTypes({tyOwned, tyRef, tyPtr}):
localError(c.graph.config, dep.info, "internal error: up references do not agree")
if c.graph.config.selectedGC == gcDestructors and sfCursor notin upField.flags:
localError(c.graph.config, dep.info, "internal error: up reference is not a .cursor")
when false:
if c.graph.config.selectedGC == gcDestructors and sfCursor notin upField.flags:
localError(c.graph.config, dep.info, "internal error: up reference is not a .cursor")
else:
let result = newSym(skField, upIdent, obj.owner, obj.owner.info)
result.typ = fieldType
if c.graph.config.selectedGC == gcDestructors:
result.flags.incl sfCursor
when false:
if c.graph.config.selectedGC == gcDestructors:
result.flags.incl sfCursor
rawAddField(obj, result)
discard """