Function lazy

packages/opencode/src/util/lazy.ts:1–20

(fn: () => T)

export function lazy<T>(fn: () => T) {
  let value: T | undefined
  let loaded = false

  const result = (): T => {
    if (loaded) return value as T
    value = fn()
    loaded = true
    return value as T
  }

  result.reset = () => {
    loaded = false
    value = undefined
  }

  result.loaded = () => loaded

  return result
}