add incl/excl for sets accepting accepting other sets

1 files changed, 8 insertions, 0 deletions

diff --git a/lib/system.nim b/lib/system.nim
index 978fae1a6..241b0bd03 100644
--- a/lib/system.nim
+++ b/lib/system.nim
@@ -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
   ## ``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.}
   ## excludes element ``y`` to the set ``x``. This is the same as
   ## ``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.}
   ## returns the cardinality of the set ``x``, i.e. the number of elements
   ## in the set.