chickadee » cock-utils » write-example

Renders an example, evaluating the expressions; attempts to require-extension all modules seen so far.

(define (write-example data description expressions)
  (display description)
  (newline)
  (let ((env (interaction-environment))
        (modules (hash-table-ref/default data 'modules '())))
    (for-each
      (lambda (module) (eval `(require-extension ,module) env))
      modules)
    (for-each
      (lambda (expression)
        (fmt #t (columnar " " (with-width 78 (pretty expression))))
        (fmt #t
             (columnar "  => " (with-width 74 (pretty (eval expression env))))
             " "
             nl))
      expressions)))