54 lines
1.3 KiB
TypeScript
54 lines
1.3 KiB
TypeScript
//// [narrowTypeByInstanceof.ts]
|
|
class Match {
|
|
public range(): any {
|
|
return undefined;
|
|
}
|
|
}
|
|
|
|
class FileMatch {
|
|
public resource(): any {
|
|
return undefined;
|
|
}
|
|
}
|
|
|
|
type FileMatchOrMatch = FileMatch | Match;
|
|
|
|
|
|
let elementA: FileMatchOrMatch, elementB: FileMatchOrMatch;
|
|
|
|
if (elementA instanceof FileMatch && elementB instanceof FileMatch) {
|
|
let a = elementA.resource().path;
|
|
let b = elementB.resource().path;
|
|
} else if (elementA instanceof Match && elementB instanceof Match) {
|
|
let a = elementA.range();
|
|
let b = elementB.range();
|
|
}
|
|
|
|
|
|
//// [narrowTypeByInstanceof.js]
|
|
var Match = (function () {
|
|
function Match() {
|
|
}
|
|
Match.prototype.range = function () {
|
|
return undefined;
|
|
};
|
|
return Match;
|
|
})();
|
|
var FileMatch = (function () {
|
|
function FileMatch() {
|
|
}
|
|
FileMatch.prototype.resource = function () {
|
|
return undefined;
|
|
};
|
|
return FileMatch;
|
|
})();
|
|
var elementA, elementB;
|
|
if (elementA instanceof FileMatch && elementB instanceof FileMatch) {
|
|
var a = elementA.resource().path;
|
|
var b = elementB.resource().path;
|
|
}
|
|
else if (elementA instanceof Match && elementB instanceof Match) {
|
|
var a = elementA.range();
|
|
var b = elementB.range();
|
|
}
|