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Fixes typo in documentation to erased terms #8605

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Mar 26, 2020
Merged

Fixes typo in documentation to erased terms #8605

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14 changes: 7 additions & 7 deletions docs/docs/reference/metaprogramming/erased-terms.md
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,7 @@ sealed trait State
final class On extends State
final class Off extends State

@implicitNotFound("State is must be Off")
@implicitNotFound("State must be Off")
class IsOff[S <: State]
object IsOff {
implicit def isOff: IsOff[Off] = new IsOff[Off]
Expand All @@ -32,7 +32,7 @@ val m = new Machine[Off]
m.turnedOn
m.turnedOn.turnedOn // ERROR
// ^
// State is must be Off
// State must be Off
```

Note that in the code above the actual context arguments for `IsOff` are never
Expand Down Expand Up @@ -118,14 +118,14 @@ sealed trait State
final class On extends State
final class Off extends State

@implicitNotFound("State is must be Off")
@implicitNotFound("State must be Off")
class IsOff[S <: State]
object IsOff {
// will not be called at runtime for turnedOn, the compiler will only require that this evidence exists
given IsOff[Off] = new IsOff[Off]
}

@implicitNotFound("State is must be On")
@implicitNotFound("State must be On")
class IsOn[S <: State]
object IsOn {
// will not exist at runtime, the compiler will only require that this evidence exists at compile time
Expand All @@ -150,11 +150,11 @@ object Test {

// m.turnedOff
// ^
// State is must be On
// State must be On

// m.turnedOn.turnedOn
// ^
// State is must be Off
// State must be Off
}
}
```
Expand Down Expand Up @@ -196,4 +196,4 @@ object Test {
}
```

[More Details](./erased-terms-spec.md)
[More Details](./erased-terms-spec.md)
8 changes: 4 additions & 4 deletions tests/run-custom-args/erased/erased-machine-state.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@ sealed trait State
final class On extends State
final class Off extends State

@implicitNotFound("State is must be Off")
@implicitNotFound("State must be Off")
class IsOff[S <: State]
object IsOff {
implicit def isOff: IsOff[Off] = {
Expand All @@ -13,7 +13,7 @@ object IsOff {
}
}

@implicitNotFound("State is must be On")
@implicitNotFound("State must be On")
class IsOn[S <: State]
object IsOn {
implicit def isOn: IsOn[On] = {
Expand Down Expand Up @@ -48,10 +48,10 @@ object Test {

// m.turnedOff
// ^
// State is must be On
// State must be On

// m.turnedOn.turnedOn
// ^
// State is must be Off
// State must be Off
}
}