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added system.typeof operation; fixes #9093

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Araq 2018-10-24 17:09:51 +02:00
commit 963292f725
5 changed files with 47 additions and 4 deletions
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9
lib/system.nim
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@ -180,6 +180,15 @@ else:
## Cannot be overloaded.
discard
when defined(nimHasTypeof):
type
TypeOfMode* = enum ## Possible modes of `typeof`.
typeOfProc, ## Prefer the interpretation that means `x` is a proc call.
typeOfIter ## Prefer the interpretation that means `x` is an iterator call.
proc typeof*(x: untyped; mode = typeOfIter): typeDesc {.magic: "TypeOf", noSideEffect, compileTime.} =
## Builtin 'typeof' operation for accessing the type of an expression. Since version 0.20.0.
discard
proc `not`*(x: bool): bool {.magic: "Not", noSideEffect.}
## Boolean not; returns true iff ``x == false``.