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Add AsType generic wrapper over As #1296

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Add AsType generic wrapper over As #1296

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5 changes: 5 additions & 0 deletions annotated.go
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Original file line number Diff line number Diff line change
Expand Up @@ -1260,6 +1260,11 @@ func As(interfaces ...any) Annotation {
return &asAnnotation{targets: interfaces}
}

// AsType is [As](new(T)). Same as errors.AsType versus errors.As.
func AsType[T any]() Annotation {
return As(new(T))
}

// Self returns a special value that can be passed to [As] to indicate
// that a type should be provided as its original type, in addition to whatever other
// types it gets provided as via other [As] annotations.
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9 changes: 9 additions & 0 deletions annotated_test.go
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Expand Up @@ -462,6 +462,15 @@ func TestAnnotatedAs(t *testing.T) {
assert.Equal(t, s.String(), "a good stringer")
},
},
{
desc: "provide a good stringer via AsType",
provide: fx.Provide(
fx.Annotate(newAsStringer, fx.AsType[fmt.Stringer]()),
),
invoke: func(s fmt.Stringer) {
assert.Equal(t, s.String(), "a good stringer")
},
},
{
desc: "value type implementing interface",
provide: fx.Provide(
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