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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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compiler/vmops.nim
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@ -316,3 +316,7 @@ proc registerAdditionalOps*(c: PCtx) =
let fn = getNode(a, 0)
setResult(a, (fn.typ != nil and tfNoSideEffect in fn.typ.flags) or
(fn.kind == nkSym and fn.sym.kind == skFunc))
registerCallback c, "stdlib.typetraits.hasClosureImpl", proc (a: VmArgs) =
let fn = getNode(a, 0)
setResult(a, fn.kind == nkClosure or (fn.typ != nil and fn.typ.callConv == ccClosure))