Function startsWith

src/patterns.ts:817–820

(
  start: start
)

 */

const startsWith = <input, const start extends string>(
  start: start
): GuardP<input, `${start}${string}`> =>
  when((value) => isString(value) && value.startsWith(start));

/**
 * `P.string.endsWith(end)` is a pattern, matching **strings** ending with `end`.