ResolveJsonModule String Literal Type TypeCheck failure

[sanderhahn]

TypeScript Version: 3.4.0-dev.201xxxxx

Search Terms:

resolveJsonModule String Literal Type TS2322

Code

// @resolveJsonModule: true
type Gender = "male" | "female";
const correct: { gender: Gender } = { gender: "male" }; // okay

import * as input from "./example.json"; // example.json contains {"gender": "male"}
const incorrect: { gender: Gender } = input; // Type 'string' is not assignable to type 'Gender'

Expected behavior:
Correctly compiles

Actual behavior:

example.ts:7:7 - error TS2322: Type '{ "gender": string; }' is not assignable to type '{ gender: Gender; }'.
  Types of property 'gender' are incompatible.
    Type 'string' is not assignable to type 'Gender'.

[RyanCavanaugh]

JSON files don't get literal types; see #26552

[sanderhahn]

Ah okay, i understand!
Thanks for all the great work on TypeScript :-)