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preserves
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mapPointers can yield non-pointers

This commit is contained in:
Tony Garnock-Jones 2021-02-24 20:40:49 +01:00
parent 055b367764
commit c46566e5a0
1 changed files with 3 additions and 3 deletions
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6
implementations/javascript/src/fold.ts
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@ -68,9 +68,9 @@ export class IdentityFold<T extends object> extends ValueFold<T, T> {
}
export class MapFold<T extends object, R extends object> extends ValueFold<T, R> {
readonly f: (t: T) => R;
readonly f: (t: T) => Value<R>;
constructor(f: (t: T) => R) {
constructor(f: (t: T) => Value<R>) {
super();
this.f = f;
}
@ -127,7 +127,7 @@ export function fold<T extends object, R>(v: Value<T>, o: FoldMethods<T, R>): R
export function mapPointers<T extends object, R extends object>(
v: Value<T>,
f: (t: T) => R,
f: (t: T) => Value<R>,
): Value<R>
{
return fold(v, new MapFold(f));