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Add hasClosure to std/typetraits (#17501)

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* fix nim js cmp fails at CT

* Add `hasClosure` to `std/effecttraits`

* type

* Update changelog.md

Co-authored-by: Timothee Cour <timothee.cour2@gmail.com>

* Update lib/std/effecttraits.nim

Co-authored-by: Timothee Cour <timothee.cour2@gmail.com>
Co-authored-by: Andreas Rumpf <rumpf_a@web.de>
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flywind 2021-03-29 20:22:29 +08:00 • committed by GitHub
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11
lib/pure/typetraits.nim
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@ -263,3 +263,14 @@ since (1, 1):
type T2 = T
genericParamsImpl(T2)
proc hasClosureImpl(n: NimNode): bool = discard "see compiler/vmops.nim"
proc hasClosure*(fn: NimNode): bool {.since: (1, 5, 1).} =
## Return true if the func/proc/etc `fn` has `closure`.
## `fn` has to be a resolved symbol of kind `nnkSym`. This
## implies that the macro that calls this proc should accept `typed`
## arguments and not `untyped` arguments.
expectKind fn, nnkSym
result = hasClosureImpl(fn)