Function makeWhen

packages/effect/src/internal/matcher.ts:102–109

(
  guard: (u: unknown) => boolean,
  evaluate: (input: unknown) => any
)

}

const makeWhen = (
  guard: (u: unknown) => boolean,
  evaluate: (input: unknown) => any
): When => ({
  _tag: "When",
  guard,
  evaluate
})

const makeNot = (
  guard: (u: unknown) => boolean,