Can't use `implements` as an object key

[sebmck]

Not sure if it's related to just a library file but I'm currently unable to use reserved words as property names. I have the following declare class:

declare class BabelNodeClassDeclaration extends BabelNode {
  type: "ClassDeclaration";
  id: BabelNodeIdentifier;
  body: BabelNodeClassBody;
  superClass?: void | BabelNodeExpression;
  decorators: any;
  typeParameters: any;
  superTypeParameters: any;
  implements: any;
}

Note the implements property name. This causes the parser to fail with:

[LIB] types.js:365:3,12: Library parse error:
[LIB] types.js:365:3,12: Use of future reserved word in strict mode

However if I wrap implements in quotes like:

"implements": any;

then I get a different error, this time not from the parser of:

[LIB] types.js:522:3,11: Library type error:
[LIB] types.js:522:3,11:
illegal name

Is there anyway around this? I'm unable to change the name of that property and need to annotate it.

Any help is appreciated, thanks!

[mroch]

type Foo = {implements: string}; also errors, so I don't think it's related to being in a library file

[sebmck]

@mroch Wasn't 100% sure whether or not the "Library parse error" message was specific or more general.