perlica/dist/Option.js

<h1 align="center">Perlica</h1>

// src/Iterator.ts
var OnceIterator = class _OnceIterator {
  constructor(value) {
    this.value = value;
  }
  done = false;
  next(value) {
    if (this.done) {
      return {
        done: true,
        value
      };
    }
    this.done = true;
    return {
      done: false,
      value: this.value
    };
  }
  [Symbol.iterator]() {
    return new _OnceIterator(this.value);
  }
};

// src/Predicate/index.ts
var isNotNull = (value) => value !== null;
var isNotUndefined = (value) => value !== void 0;
var isNotNullable = (value) => isNotNull(value) && isNotUndefined(value);

// src/Result.ts
var isOk = (r) => r.tag === "ok";
var isErr = (r) => r.tag === "err";
var ok = (v) => {
  const a = Object.create(ResultProto());
  a.value = v;
  a.tag = "ok";
  return a;
};
var err = (v) => {
  const a = Object.create(ResultProto());
  a.value = v;
  a.tag = "err";
  return a;
};
var ResultProto = () => ({
  and(res) {
    return isOk(this) ? res : err(this.value);
  },
  andThen(f) {
    return isOk(this) ? f(this.value) : err(this.value);
  },
  err() {
    return isErr(this) ? some(this.value) : none();
  },
  expect(msg) {
    if (isOk(this)) {
      return this.value;
    } else {
      throw new Error(msg);
    }
  },
  expectErr(msg) {
    if (isErr(this)) {
      return this.value;
    } else {
      throw new Error(msg);
    }
  },
  flatten() {
    return this.andThen((v) => v);
  },
  inspect(f) {
    if (isOk(this)) {
      f(this.value);
      return ok(this.value);
    } else {
      return err(this.value);
    }
  },
  inspectErr(f) {
    if (isErr(this)) {
      f(this.value);
      return err(this.value);
    } else {
      return ok(this.value);
    }
  },
  isErr() {
    return isErr(this);
  },
  isErrAnd(f) {
    return isErr(this) && f(this.value);
  },
  isOk() {
    return isOk(this);
  },
  isOkAnd(f) {
    return isOk(this) && f(this.value);
  },
  map(f) {
    return isOk(this) ? ok(f(this.value)) : err(this.value);
  },
  mapErr(f) {
    return isErr(this) ? err(f(this.value)) : ok(this.value);
  },
  mapOr(def, f) {
    return isOk(this) ? f(this.value) : def;
  },
  mapOrElse(def, f) {
    return isOk(this) ? f(this.value) : def(this.value);
  },
  ok() {
    return isOk(this) ? some(this.value) : none();
  },
  or(f) {
    return isErr(this) ? err(f(this.value)) : ok(this.value);
  },
  orElse(f) {
    return isErr(this) ? f(this.value) : ok(this.value);
  },
  transpose() {
    return isErr(this) ? some(err(this.value)) : isNone(this.value) ? none() : some(ok(this.value.value));
  },
  unwrap() {
    if (isOk(this)) {
      return this.value;
    } else {
      throw new Error(`called \`Result.unwrap()\` on an \`Err\` value: ${String(this.value)}`);
    }
  },
  unwrapErr() {
    if (isErr(this)) {
      return this.value;
    } else {
      throw new Error(`called \`Result.unwrapErr()\` on an \`Ok\` value: ${String(this.value)}`);
    }
  },
  unwrapOr(def) {
    return isOk(this) ? this.value : def;
  },
  unwrapOrElse(def) {
    return isOk(this) ? this.value : def(this.value);
  },
  [Symbol.iterator]() {
    return new OnceIterator(this);
  }
});

// src/Option.ts
var isSome = (r) => r.tag === "some";
var isNone = (r) => r.tag === "none";
var OptionProto = () => ({
  and(v) {
    return isSome(this) ? v : none();
  },
  andThen(f) {
    return isSome(this) ? f(this.value) : none();
  },
  expect(msg) {
    if (isSome(this)) {
      return this.value;
    } else {
      throw new Error(msg);
    }
  },
  filter(f) {
    return isNone(this) ? none() : f(this.value) ? this : none();
  },
  flatten() {
    return isSome(this) ? this.value : none();
  },
  inspect(f) {
    if (isSome(this)) {
      f(this.value);
      return some(this.value);
    } else {
      return none();
    }
  },
  isNone() {
    return isNone(this);
  },
  isNoneOr(f) {
    return isNone(this) || f(this.value);
  },
  isSome() {
    return isSome(this);
  },
  isSomeAnd(f) {
    return isNone(this) ? false : f(this.value);
  },
  map(f) {
    return isSome(this) ? some(f(this.value)) : none();
  },
  mapOr(def, f) {
    return isSome(this) ? f(this.value) : def;
  },
  mapOrElse(d, f) {
    return isSome(this) ? f(this.value) : d();
  },
  okOr(v) {
    return isSome(this) ? ok(this.value) : err(v);
  },
  okOrElse(f) {
    return isSome(this) ? ok(this.value) : err(f());
  },
  or(v) {
    return isSome(this) ? this : v;
  },
  orElse(f) {
    return isSome(this) ? this : f();
  },
  transpose() {
    return isNone(this) ? ok(none()) : isErr(this.value) ? err(this.value.value) : ok(some(this.value.value));
  },
  unwrap() {
    if (isSome(this)) {
      return this.value;
    } else {
      throw new Error("called `Option.unwrap()` on a `None` value");
    }
  },
  unwrapOr(def) {
    return isSome(this) ? this.value : def;
  },
  unwrapOrElse(def) {
    return isSome(this) ? this.value : def();
  },
  xor(v) {
    return isSome(this) && isSome(v) ? this : isNone(this) && isSome(v) ? v : none();
  },
  [Symbol.iterator]() {
    return new OnceIterator(this);
  }
});
var fromNullable = (v) => isNotNullable(v) ? some(v) : none();
var fromResult = (v) => v.ok();
var tryCatch = (f) => {
  try {
    return some(f());
  } catch (_) {
    return none();
  }
};
var tryPromise = async (v) => v.then((s) => some(s)).catch((_) => none());
var some = (v) => {
  const a = Object.create(OptionProto());
  a.value = v;
  a.tag = "some";
  return a;
};
var none = () => {
  const a = Object.create(OptionProto());
  a.tag = "none";
  return a;
};
var bind = (fn) => {
  const iter = fn();
  let result = iter.next();
  while (true) {
    if (result.done) {
      return some(result.value);
    }
    if (isSome(result.value)) {
      result = iter.next(result.value.value);
    } else {
      return result.value;
    }
  }
};
export {
  OptionProto,
  bind,
  fromNullable,
  fromResult,
  isNone,
  isSome,
  none,
  some,
  tryCatch,
  tryPromise
};