Const enum indexed access

[jbondc]

Fix for #3411

const enum numbers {
    one = 1
}
interface OptimizedData {
    0: number;
    1: any[];
    2: number;
}
let data:OptimizedData 

// works
data[1] // any[]
data[numbers.one] // any[]

[mhegazy]

i would appreciate it if you remove this commented section.

[mhegazy]

2 small comments. other than that 👍

thanks!

[mhegazy]

Thanks!