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nicolasstucki merged 1 commit into from
Jun 17, 2019
Merged

Update higher-kinded-v2 #6694

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10 changes: 5 additions & 5 deletions docs/docs/internals/higher-kinded-v2.md
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Original file line number Diff line number Diff line change
Expand Up @@ -213,7 +213,7 @@ more than one type parameter. For instance, here is a trait with contravariant
and covariant type parameters:

```scala
trait Lambda$NP[type -$hkArg$0, +$hkArg1] { type +Apply } extends Lambda$IP with Lambda$NI
trait Lambda$NP[type -$hkArg$0, +$hkArg$1] { type +Apply } extends Lambda$IP with Lambda$NI
```

Aside: the `+` prefix in front of `Apply` indicates that `Apply` is a covariant
Expand All @@ -225,9 +225,9 @@ subtypes of traits which don't. The supertraits of `Lambda$NP` would themselves
be written as follows.

```scala
trait Lambda$IP[type $hkArg$0, +$hkArg1] { type +Apply } extends Lambda$II
trait Lambda$NI[type -$hkArg$0, $hkArg1] { type +Apply } extends Lambda$II
trait Lambda$II[type $hkArg$0, $hkArg1] { type +Apply }
trait Lambda$IP[type $hkArg$0, +$hkArg$1] { type +Apply } extends Lambda$II
trait Lambda$NI[type -$hkArg$0, $hkArg$1] { type +Apply } extends Lambda$II
trait Lambda$II[type $hkArg$0, $hkArg$1] { type +Apply }
```

`Lambda` traits are special in that they influence how type applications are
Expand Down Expand Up @@ -313,7 +313,7 @@ The type parameters of `Rep` are the type parameters of its upper bound, so
More generally, a higher-kinded type declaration

```scala
type T[v1 X1 >: S1 <: U1, ..., vn XN >: S1 <: UN] >: SR <: UR
type T[v1 X1 >: S1 <: U1, ..., vn XN >: SN <: UN] >: SR <: UR
```

is encoded as
Expand Down