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Fix #4422: Reset queue element on pop. Prevent NimVM confusion. Help GC.

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Matthew Baulch 2016-07-11 15:10:54 +10:00
commit 90a5edfa6d
1 changed files with 2 additions and 0 deletions
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lib/pure/collections/queues.nim
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@ -152,11 +152,13 @@ proc add*[T](q: var Queue[T], item: T) =
q.data[q.wr] = item q.data[q.wr] = item
q.wr = (q.wr + 1) and q.mask q.wr = (q.wr + 1) and q.mask
proc default[T](t: typedesc[T]): T {.inline.} = discard
proc pop*[T](q: var Queue[T]): T {.inline, discardable.} = proc pop*[T](q: var Queue[T]): T {.inline, discardable.} =
## Remove and returns the first (oldest) element of the queue `q`. ## Remove and returns the first (oldest) element of the queue `q`.
emptyCheck(q) emptyCheck(q)
dec q.count dec q.count
result = q.data[q.rd] result = q.data[q.rd]
q.data[q.rd] = default(type(result))
q.rd = (q.rd + 1) and q.mask q.rd = (q.rd + 1) and q.mask
proc enqueue*[T](q: var Queue[T], item: T) = proc enqueue*[T](q: var Queue[T], item: T) =