Function isStringSymbol

repos/effect/packages/effect/src/SchemaAST.ts:3713–3725

(annotations?: Schema.Annotations.Filter)

 * **Details**
 *
 * After flipping, what was decoding becomes encoding and vice versa. This is
 * the core operation behind `Schema.encode` — encoding a value is decoding
 * with a flipped SchemaAST.
 *
 * - Memoized: same input reference → same output reference.
 * - Recursively walks composite nodes.
 *
 * @see {@link toType}
 * @see {@link toEncoded}
 * @category transforming
 * @since 4.0.0
 */
export const flip = memoize((ast: AST): AST => {
  if (ast.encoding) {
    return flipEncoding(ast, ast.encoding)
  }