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add incl/excl for sets accepting accepting other sets

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Zahary Karadjov 2013-12-30 14:25:05 +02:00
commit 88873f7965
1 changed files with 8 additions and 0 deletions
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lib/system.nim
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@ -422,10 +422,18 @@ proc incl*[T](x: var set[T], y: T) {.magic: "Incl", noSideEffect.}
## includes element ``y`` to the set ``x``. This is the same as ## includes element ``y`` to the set ``x``. This is the same as
## ``x = x + {y}``, but it might be more efficient. ## ``x = x + {y}``, but it might be more efficient.
template incl*[T](s: var set[T], flags: set[T]) =
## includes the set of flags to the set ``x``.
s = s + flags
proc excl*[T](x: var set[T], y: T) {.magic: "Excl", noSideEffect.} proc excl*[T](x: var set[T], y: T) {.magic: "Excl", noSideEffect.}
## excludes element ``y`` to the set ``x``. This is the same as ## excludes element ``y`` to the set ``x``. This is the same as
## ``x = x - {y}``, but it might be more efficient. ## ``x = x - {y}``, but it might be more efficient.
template excl*[T](s: var set[T], flags: set[T]) =
## excludes the set of flags to ``x``.
s = s - flags
proc card*[T](x: set[T]): int {.magic: "Card", noSideEffect.} proc card*[T](x: set[T]): int {.magic: "Card", noSideEffect.}
## returns the cardinality of the set ``x``, i.e. the number of elements ## returns the cardinality of the set ``x``, i.e. the number of elements
## in the set. ## in the set.