File: typeParameterConstraintInstantiation.ts

package info (click to toggle)
node-typescript 3.3.3333-1
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 324,548 kB
  • sloc: makefile: 6; sh: 3
file content (8 lines) | stat: -rw-r--r-- 229 bytes parent folder | download | duplicates (7) 
1
2
3
4
5
6
7
8
 
// Check that type parameter constraints are properly instantiated

interface Mapper<T> {
    map<U extends T, V extends U[]>(f: (item: T) => U): V;
}

var m: Mapper<string>;
var a = m.map((x: string) => x);  // string[]