Subject: Re: defconstant From: Erik Naggum <email@example.com> Date: 1995/12/15 Newsgroups: comp.lang.lisp Message-ID: <19951215T021024Z@arcana.naggum.no> [Stefan Monnier] | Is it possible to use defconstant to define anything else than trivial | values? | | A file such as: | | (defstruct s a) | (defconstant toto (make-s :a 1)) | | is refused by AllegroCL: | | USER(26): :cl ~/tmp/toto.lisp | ; --- Compiling file /users/monnier/tmp/toto.lisp --- | ; Compiling MAKE-S | ; While compiling (:TOP-LEVEL-FORM "toto.lisp" 2): | Error: attempt to call `MAKE-S' which is an undefined function. | [condition type: UNDEFINED-FUNCTION] | | I can work around this by defining toto as a defvar initialized to nil | and then set it to some (constant) value inside an init function, but I | can't believe defconstant is so limited! would `eval-when' provide a solution to this problem (i.e., around the first `defstruct')? I don't fully understand the CLtL2 or ANSI CL `eval-when' description, so this is a guess: (eval-when (:compile-toplevel :load-toplevel :execute) (defstruct s a)) (defconstant toto (make-s :a 1)) this works with CMUCL 17f, GCL 2.1 and CLISP 1995-08-12, albeit with the deprecated symbols `compile', `load', and `eval', but I'd like to know if this is the right way to do it. comments? #<Erik 3027982224> -- suppose we actually were immortal... what is the opposite of living your life as if every day were your last?