Christopher Chedeau
cf45afba61
- This brings in the flow test suite that contains a ton of JavaScript parsing edge cases - This creates snapshot tests using the pretty printer for all of them - If uncomment `RUN_AST_TESTS` line in `tests/run_specs.js`, it checks ast(pretty_print(x)) == ast(x). Right now, "178 failed, 197 passed, 375 of 377 total". So half of the tests are not passing, most of them are crashes and many of the rest are subtle issues.
48 lines
1.2 KiB
JavaScript
48 lines
1.2 KiB
JavaScript
/***
|
|
* consts retain refinements
|
|
* @flow
|
|
*/
|
|
|
|
// global, anybody can call it at any time
|
|
var call_me: () => void = () => {};
|
|
|
|
function g(x: ?number) {
|
|
|
|
const const_x = x;
|
|
if (const_x) {
|
|
// ok: if const_x is truthy here, it's truthy everywhere
|
|
call_me = () => { var y:number = const_x; };
|
|
}
|
|
|
|
var var_x = x;
|
|
if (var_x) {
|
|
// error: var_x might no longer be truthy when call_me is called
|
|
call_me = () => { var y:number = var_x; }; // error
|
|
}
|
|
var_x = null;
|
|
}
|
|
|
|
function h(x: number | string | boolean) {
|
|
|
|
const const_x = x;
|
|
if (typeof(const_x) == "number") {
|
|
call_me = () => { var y:number = const_x; }; // ok
|
|
} else if (typeof(const_x) == "string") {
|
|
call_me = () => { var y:string = const_x; }; // ok
|
|
} else if (typeof(const_x) == "boolean") {
|
|
call_me = () => { var y:boolean = const_x; }; // ok
|
|
}
|
|
|
|
var var_x = x;
|
|
if (typeof(var_x) == "number") {
|
|
call_me = () => { var y:number = var_x; }; // error
|
|
} else if (typeof(var_x) == "string") {
|
|
call_me = () => { var y:string = var_x; }; // error
|
|
} else if (typeof(var_x) == "boolean") {
|
|
call_me = () => { var y:boolean = var_x; }; // error
|
|
}
|
|
}
|
|
|
|
// in a galaxy far far away
|
|
call_me();
|