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Add missing difference and to sets module

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def 2014-07-14 15:03:09 +02:00
commit 5bfea58ffb
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lib/pure/collections/sets.nim
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@ -167,6 +167,12 @@ proc intersection*[A](s1, s2: TSet[A]): TSet[A] =
for item in s1:
if item in s2: incl(result, item)
proc difference*[A](s1, s2: TSet[A]): TSet[A] =
## returns a new set of all items that are contained in `s1`, but not in `s2`
result = s1
for item in s2:
if contains(result, item): excl(result, item)
proc symmetricDifference*[A](s1, s2: TSet[A]): TSet[A] =
## returns a new set of all items that are contained in either
## `s1` or `s2`, but not both
@ -182,6 +188,10 @@ proc `*`*[A](s1, s2: TSet[A]): TSet[A] {.inline.} =
## alias for `intersection`
result = intersection(s1, s2)
proc `-`*[A](s1, s2: TSet[A]): TSet[A] {.inline.} =
## alias for `difference`
result = difference(s1, s2)
proc `-+-`*[A](s1, s2: TSet[A]): TSet[A] {.inline.} =
## alias for `symmetricDifference`
result = symmetricDifference(s1, s2)