27 lines
789 B
TypeScript
27 lines
789 B
TypeScript
import * as _ from "@preserves/core";
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import * as _i_Actor from "../actor";
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export const $Observe = Symbol.for("Observe");
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export const Observe = _.Record.makeConstructor<{"label": symbol, "observer": _ptr}, _ptr>()($Observe, ["label","observer"]);
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export type Observe = _.Record<(typeof $Observe), [symbol, _ptr], _ptr>;
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export type _ptr = _i_Actor.Ref;
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export type _val = _.Value<_ptr>;
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export function isObserve(v: any): v is Observe {
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return (
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_.Record.isRecord<_val, _.Tuple<_val>, _ptr>(v) &&
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_.is(v.label, $Observe) &&
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((v.length === 2) && typeof v[0] === 'symbol' && _.isPointer(v[1]))
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);
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}
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export function asObserve(v: any): Observe {
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if (!isObserve(v)) {throw new TypeError(`Invalid Observe: ${_.stringify(v)}`);} else {return v;};
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}
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