work in progress: 'sink' and 'lent' types

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/system.nim b/lib/system.nim
index 4d8610737..de91c4dda 100644
--- a/lib/system.nim
+++ b/lib/system.nim
@@ -249,6 +249,10 @@ type
 when defined(nimHasOpt):
   type opt*{.magic: "Opt".}[T]
 
+when defined(nimHasSink):
+  type sink*{.magic: "BuiltinType".}[T]
+  type lent*{.magic: "BuiltinType".}[T]
+
 proc high*[T: Ordinal](x: T): T {.magic: "High", noSideEffect.}
   ## returns the highest possible index of an array, a sequence, a string or
   ## the highest possible value of an ordinal value `x`. As a special