typeof type guards don't work with switch statements

[Gozala]

TypeScript Version: 2.3

Code

declare function parse(input: string): boolean | string | number

const data = parse('whatever')

switch (typeof data) {
    case 'number':
        console.log(data.toFixed())
    case 'string':
        console.log(data.toUpperCase())
    case 'boolean':
        console.log(!data)
}

Expected behavior:

I would expect data type to be refined in each case & for this code to check.

Actual behavior:

data type does not seems to get refined by switch cases, there for errors are reported when data is treated as number and as string:

Property 'toFixed' does not exist on type 'string | number | boolean'.
  Property 'toFixed' does not exist on type 'string'.

Property 'toUpperCase' does not exist on type 'string | number | boolean'.
  Property 'toUpperCase' does not exist on type 'number'.

[RyanCavanaugh]

Duplicate #2214.