repl-print procedure calls
(write val), which is
inadequate for Guile-CV images - or for that matter, for any work that
involves very large data structure manipulations - even very small
images4. Fortunately, Guile provides both a simple mechanism to
alter the default repl printer and the alternate repl printer procedure
To modify the default repl printer, you may alter (or add if it doesn’t exist) your $HOME/.guile file or, if you are working in a multi-user environmet, you may alther (or add if it doesn’t exist) the file named init.scm in the Guile global site directory5..
Which ever solution you choose, add the following lines:
(use-modules (ice-9 pretty-print) (system repl common)) (repl-default-option-set! 'print (lambda (repl obj) (truncated-print obj) (newline)))
Even for very small images, using write is inadequate, in a terminal, and will definitely kill your Emacs/Geiser session. Not to mention it will raise your electricity bill :) - till you succeed to delete its process, Emacs will use one core at more then 100%, desperately trying to display hundreds of thousands of floating point values, heating your laptop (if you have a laptop) up to the point you’ll be able to cook an egg on it, and get its fans crasy... You’ve been warned :).
The Guile global site directory location may be obtained by evaluating
the following expression in a terminal):
guile -c "(display
(%global-site-dir))(newline)". You need write privileges to add or
modify this file, contact your system administrator if you’re not in
charge of the system you are working on.