Function is

packages/effect/src/ParseResult.ts:664–668

(schema: Schema.Schema<A, I, R>, options?: AST.ParseOptions)

 * @since 3.10.0
 */
export const is = <A, I, R>(schema: Schema.Schema<A, I, R>, options?: AST.ParseOptions) => {
  const parser = goMemo(AST.typeAST(schema.ast), true)
  return (u: unknown, overrideOptions?: AST.ParseOptions | number): u is A =>
    Either.isRight(parser(u, { exact: true, ...mergeInternalOptions(options, overrideOptions) }) as any)
}

/**
 * By default the option `exact` is set to `true`.