Closed
Description
consider this code snippet
interface SomeClassType {
name: string;
}
interface Plugin {
apply(target: SomeClassType): void;
}
class SomePlugin implements Plugin {
apply(target) { // [ts] Parameter 'target' implicitly has an 'any' type.
}
}
class SomeOtherPlugin implements Plugin { // [ts] Class 'SomeOtherPlugin' incorrectly implements interface 'Plugin'.
apply(target: string) {
}
}so the compiler knows exactly what type should param target to be.
but it can't be inferred.
add a simple type to that param should be ok.
but in some cases that SomeClassType is not exported directly at all.
can ts compiler infer that type from interface restrictions automatically？
Use case:
I'm writing a system which supports loading plugins.
I would like to export a single Plugin type to help plugin coders.
But it feels bad that
- I must export all my basic types used in params
- plugin coders should manually explicitly type them one by one in the correct order