let*

let* introduces lexical bindings sequentially, and is the sequential counterpart to let.

Syntax

(let* (⟨binding⟩...)
  ⟨body⟩...)

;; ⟨binding⟩ := ⟨declare-form⟩
;;            | (⟨var⟩ ⟨expr⟩)
;;            | ((values ⟨var⟩...) ⟨expr⟩)

Semantics

• let* binds non-recursively and sequentially top-to-bottom.
• Bound variables may be declared with declare.
• Multiple values may be destructured with values.
• ⟨body⟩ forms an implicit progn.

Example

(let* ((x 1)
       (y (+ x 1)))
  (+ x y))