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Better error message when specializing generic abstract type with unit
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9 changes: 9 additions & 0 deletions
9
...Source/Conformance/TypesAndTypeConstraints/TypeParameterDefinitions/UnitSpecialization.fs
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// #UnitGenericAbstractType | ||
//<Expects status="success"></Expects> | ||
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type Foo<'t> = | ||
abstract member Bar : 't -> int | ||
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type Bar() = | ||
interface Foo<unit> with | ||
member x.Bar _ = 1 |
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9 changes: 9 additions & 0 deletions
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tests/fsharpqa/Source/ErrorMessages/UnitGenericAbstractType/E_UnitGenericAbstractType1.fs
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// #ErrorMessages #UnitGenericAbstractType | ||
//<Expects status="error" span="(7,21)" id="FS0017">The member 'Apply : int -> unit' is specialized with 'unit' but 'unit' can't be used as return type of an abstract method parameterized on return type\.</Expects> | ||
type EDF<'S> = | ||
abstract member Apply : int -> 'S | ||
type SomeEDF () = | ||
interface EDF<unit> with | ||
member this.Apply d = | ||
// [ERROR] The member 'Apply' does not have the correct type to override the corresponding abstract method. | ||
() |
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tests/fsharpqa/Source/ErrorMessages/UnitGenericAbstractType/env.lst
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SOURCE=E_UnitGenericAbstractType1.fs # E_UnitGenericAbstractType1 |
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