loop-controls/src/core.ts

break/continue controls for loops and higher-order functions (sync, async, concurrent). Designed to compose with ts-pattern.

export class _Break<T = unknown> extends Error {
  readonly value?: T;
  constructor(value?: T) { super("BREAK"); this.value = value; }
}
export class _Continue extends Error {
  constructor() { super("CONTINUE"); }
}

export type Control = {
  break: <T = unknown>(value?: T) => never;
  continue: () => never;
};

export const $control: Control = {
  break: (value?: unknown): never => { throw new _Break(value); },
  continue: (): never => { throw new _Continue(); },
};