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fix #12200, cannot 'inc' CountTable by a negative value (#12208)

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* fix #12200, cannot 'inc' CountTable by a negative value

* use Positive
This commit is contained in:
Miran 2019-09-17 21:29:25 +02:00 • committed by Andreas Rumpf
commit 618316beb9
1 changed files with 5 additions and 2 deletions
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7
lib/pure/collections/tables.nim
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@ -2181,7 +2181,7 @@ template ctget(t, key, default: untyped): untyped =
var index = rawGet(t, key)
result = if index >= 0: t.data[index].val else: default
proc inc*[A](t: var CountTable[A], key: A, val = 1)
proc inc*[A](t: var CountTable[A], key: A, val: Positive = 1)
# ----------------------------------------------------------------------
@ -2246,8 +2246,11 @@ proc `[]=`*[A](t: var CountTable[A], key: A, val: int) =
else:
insertImpl()
proc inc*[A](t: var CountTable[A], key: A, val = 1) =
proc inc*[A](t: var CountTable[A], key: A, val: Positive = 1) =
## Increments ``t[key]`` by ``val`` (default: 1).
##
## ``val`` must be a positive number. If you need to decrement a value,
## use a regular ``Table`` instead.
runnableExamples:
var a = toCountTable("aab")
a.inc('a')