70 lines
1.7 KiB
JavaScript
70 lines
1.7 KiB
JavaScript
/**
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* @since 2.0.0
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*/
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import * as Equal from "../Equal.js";
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import * as Hash from "../Hash.js";
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import { format, NodeInspectSymbol, toJSON } from "../Inspectable.js";
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import { hasProperty } from "../Predicate.js";
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import { EffectPrototype } from "./effectable.js";
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const TypeId = /*#__PURE__*/Symbol.for("effect/Option");
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const CommonProto = {
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...EffectPrototype,
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[TypeId]: {
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_A: _ => _
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},
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[NodeInspectSymbol]() {
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return this.toJSON();
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},
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toString() {
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return format(this.toJSON());
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}
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};
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const SomeProto = /*#__PURE__*/Object.assign(/*#__PURE__*/Object.create(CommonProto), {
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_tag: "Some",
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_op: "Some",
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[Equal.symbol](that) {
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return isOption(that) && isSome(that) && Equal.equals(this.value, that.value);
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},
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[Hash.symbol]() {
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return Hash.cached(this, Hash.combine(Hash.hash(this._tag))(Hash.hash(this.value)));
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},
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toJSON() {
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return {
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_id: "Option",
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_tag: this._tag,
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value: toJSON(this.value)
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};
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}
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});
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const NoneHash = /*#__PURE__*/Hash.hash("None");
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const NoneProto = /*#__PURE__*/Object.assign(/*#__PURE__*/Object.create(CommonProto), {
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_tag: "None",
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_op: "None",
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[Equal.symbol](that) {
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return isOption(that) && isNone(that);
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},
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[Hash.symbol]() {
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return NoneHash;
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},
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toJSON() {
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return {
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_id: "Option",
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_tag: this._tag
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};
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}
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});
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/** @internal */
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export const isOption = input => hasProperty(input, TypeId);
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/** @internal */
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export const isNone = fa => fa._tag === "None";
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/** @internal */
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export const isSome = fa => fa._tag === "Some";
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/** @internal */
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export const none = /*#__PURE__*/Object.create(NoneProto);
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/** @internal */
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export const some = value => {
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const a = Object.create(SomeProto);
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a.value = value;
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return a;
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};
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//# sourceMappingURL=option.js.map
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