dynamic-bind temporarily rebinds dynamic variables for the duration of a body.

Syntax

(dynamic-bind ((*⟨name⟩* ⟨expr⟩) ...)
  ⟨body⟩)

Semantics

  • dynamic-bind only works with dynamic variables, which are variables defined with define and named like *name*.
  • Bindings are parallel and non-recursive: each initializer is checked in the outer environment.
  • Each rebinding must preserve the variable’s existing type.
  • When the body finishes, the old dynamic bindings are restored.

Example

(dynamic-bind ((*base* 20))
  (base-value))