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/* @flow */
function foo(text: string | number): string {
switch (typeof text) {
  case 'string':
   return text;
case 'number':
return text; // error, should return string
  default:
   return 'wat';
 }
}
function bar(text: string | number): string {
switch (typeof text) {
case 'string':
return text[0];
 default:
return (text++) + '';
 }
}
function baz1(text: string | number): string {
switch (typeof text) {
case 'number':
case 'string':
return text[0]; // error, [0] on number
 default:
return 'wat';
 }
}
function baz2(text: string | number): string {
switch (typeof text) {
case 'string':
case 'number':
return text[0]; // error, [0] on number
 default:
return 'wat';
 }
}
function corge(text: string | number | Array<string>): string {
switch (typeof text) {
case 'object':
return text[0];
case 'string':
case 'number':
// using ++ since it isn't valid on arrays or strings.
// should only error for string since Array was filtered out.
return (text++) + '';
 default:
return 'wat';
 }
}