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[feature request] consistent index access type for this type #12349
Description
Sorry it's me again....
it seems this type is resolved too eagerly in parent class.
TypeScript Version: nightly
Code
class A {
prop: {}
propCopy: this['prop']
}
class B extends A {
prop: {field: number}
propCopy2: this['prop']
}
var b = new B
b.propCopy.field // error here
b.propCopy2.fieldExpected behavior:
Code should compile. both propCopy and propCopy2 have the same type.
Actual behavior:
Error on b.propCopy.field, b.propCopy is typed as {}
Activity
aluanhaddad commentedon Nov 20, 2016
This behavior seems to make sense.
propdoesn't have afieldproperty in the base class wherepropCopyis defined. If you redefine the field on the subclass the error goes away.HerringtonDarkholme commentedon Nov 20, 2016
I believe this is the same issue with #11929 (comment)
It is not a bug report but a feature request.
aluanhaddad commentedon Nov 20, 2016
Herrington Darkholme (@HerringtonDarkholme) I see. I was thinking about it as a bug report, sorry.
[-]Inconsistent index access type for this type[/-][+][feature request] consistent index access type for this type[/+]