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lenVarargs: number of varargs elements (#12907)

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Timothee Cour 2019-12-23 09:42:32 +01:00 • committed by Andreas Rumpf
commit a0980c88c9
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5
lib/system.nim
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@ -4198,6 +4198,11 @@ type
NimNode* {.magic: "PNimrodNode".} = ref NimNodeObj
## Represents a Nim AST node. Macros operate on this type.
macro lenVarargs*(x: varargs[untyped]): int {.since: (1, 1).} =
## returns number of variadic arguments in `x`
proc lenVarargsImpl(x: NimNode): NimNode {.magic: "LengthOpenArray", noSideEffect.}
lenVarargsImpl(x)
when false:
template eval*(blk: typed): typed =
## Executes a block of code at compile time just as if it was a macro.