TypeScript syntax highlighting breaks for class methods returning a type ending in a digit

[aeschli]

From @lostfictions on June 3, 2016 7:45

This is a bit of a strange one. In the screenshot below, a class with two methods is declared. The first returns a number and has correct syntax highlighting. The second has an almost identical body but returns an endsWithDigit1 (a type alias for number), which breaks highlighting for the method body.

(On a more practical level, I discovered this while trying write a method that returned a Matrix4x4, so it's definitely something that might happen in day-to-day use!)

• VSCode Version: 1.1.1
• OS Version: Ubuntu 14.04

Steps to Reproduce:

The repro code in the screenshot above is as follows:

type endsWithDigit1 = number

class Repro {
  normalMember() : number {

    const someDeclaration : (name : string) => string = (name) => 'hello there ' + name
    const myString = someDeclaration('human')
    let coolNumber = myString.length + 20
    var anotherCoolThing = {
      pigs: 6,
      rabbits: 29,
      horseName: 'Johnny'
    }

    console.log('this is how the syntax highlighting should look!')

    return 1
  }

  badHighlightingMember() : endsWithDigit1 {

    const someDeclaration : (name : string) => string = (name) => 'hello there ' + name
    const myString = someDeclaration('human')
    let coolNumber = myString.length + 20
    var anotherCoolThing = {
      pigs: 6,
      rabbits: 29,
      horseName: 'Johnny'
    }

    console.log('this has some highlighting but the colors are wrong')

    return 1
  }
}

Copied from original issue: microsoft/vscode#7170

[glen-84]

Duplicate of #153.

[sheetalkamat]

Fixed by #257