@BindOption: Unable to resolve signature of property decorator when called as an expression.

[socsieng]

• I have checked issues with bug label and found no duplicates

Unable to use @BindOption for custom option names

Expected Behavior

Should be able to use @BindOption to bind custom options to class member.

Actual Behavior

Unable to use @BindOption with custom option name.

This results in a TypeScript compilation error:

TS1240: Unable to resolve signature of property decorator when called as an expression.

It works with where the parameter is keyof TypeDocOptionMap.

Steps to reproduce the bug

Sample code that will should result in the error

export class TestPlugin extends ConverterComponent {
  @BindOption('myParam') // fails - TS1240: Unable to resolve signature of property decorator when called as an expression.
  myParam!: string;

  @BindOption('name') // works with existing TypeDoc option name
  typedocParam!: string;
}

Environment

• Typedoc version: 0.16.4
• Node.js version: 8.16.0
• OS: macOS Catalina

[Gerrit0]

Well that's the weirdest TS type checking behavior I've seen in a long time...

class Test {
    @Broken // Unable to resolve signature of property decorator when called as an expression. (1240)
    a!: unknown
    @Working
    b!: unknown
}

declare function Broken(obj: object): void
declare function Working(obj: object, key: PropertyKey): void