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distinctBase overload for values (#13746)

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Timothee Cour 2020-03-25 13:47:03 -07:00 • committed by GitHub
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2
changelog.md
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@ -122,7 +122,7 @@ echo f
- Added `net.getPeerCertificates` and `asyncnet.getPeerCertificates` for - Added `net.getPeerCertificates` and `asyncnet.getPeerCertificates` for
retrieving the verified certificate chain of the peer we are connected to retrieving the verified certificate chain of the peer we are connected to
through an SSL-wrapped `Socket`/`AsyncSocket`. through an SSL-wrapped `Socket`/`AsyncSocket`.
- Added `distinctBase` overload for values: `assert 12.MyInt.distinctBase == 12`
## Library changes ## Library changes

7
lib/pure/typetraits.nim
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@ -71,6 +71,13 @@ proc distinctBase*(T: typedesc): typedesc {.magic: "TypeTrait".}
## Returns base type for distinct types, works only for distinct types. ## Returns base type for distinct types, works only for distinct types.
## compile time error otherwise ## compile time error otherwise
since (1, 1):
template distinctBase*[T](a: T): untyped =
## overload for values
runnableExamples:
type MyInt = distinct int
doAssert 12.MyInt.distinctBase == 12
distinctBase(type(a))(a)
proc tupleLen*(T: typedesc[tuple]): int {.magic: "TypeTrait", since: (1, 1).} proc tupleLen*(T: typedesc[tuple]): int {.magic: "TypeTrait", since: (1, 1).}
## Return number of elements of `T` ## Return number of elements of `T`