Note: this issue was originally filed here eslint/typescript-eslint-parser#588.

The original issue (now archived) was marked as closed, and suggested as being fixed by eslint/typescript-eslint-parser#596, however it does still appear to be an issue when using the latest 1.0.0 versions of the parser & plugin from the @typescirpt-eslint monorepo (unless I'm holding it wrong).

What code were you trying to parse?

{
	"parser": "@typescript-eslint/parser",
	"plugins": ["@typescript-eslint"],
	"rules": {
		"no-magic-numbers": "error"
	}
}

type Amount = 10 | -10;

const movement: Amount = 10

What did you expect to happen?
No errors

What actually happened?

  1:15  error  No magic number: 10   no-magic-numbers
  1:20  error  No magic number: -10  no-magic-numbers

The magic numbers that the rule is complaining about are the allowed values of the Typescript numeric literal type type Amount = 10 | -10.

I'm not aware of any way to define a numeric literal type that doesn't violate the magic numbers rule?

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