3.1.2 Combining Blocks

Multiple blocks can be combined into one new block using the combine-blocks function.

combine-blocks* is a wrapper around combine-blocks that automatically inserts its arguments into a list.

(define-block ruby-set-variables
  #:code "x = 400"
  #:language ruby)

(define-block ruby-print-x
  ;; Language may be omitted or the same.
  #:code "print x")

(block-result
 (run-block (combine-blocks*
             ruby-set-variables ruby-print-x))) ;=> "400"

Combining blocks takes the code field of each block and appends them together. The separator field of the parent is placed in between the two blocks, by default "\n".

Combining blocks also updates the subblocks field, which is discussed later.