-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi!
Am 08.01.2011 11:22, schrieb Faré: >>> Daniel Weinreb wrote: >>> - however, nothing tells us that the resulting value is used immediately >>> to initialize the slot (it could just be stored somewhere), and >>> implementations seem to be free to do so right now, or later when the >>> first instance is created. >> >> Pascal Costanza <[email protected]> wrote: >> - When a class is defined for the first time, the :initform for a >> shared slot needs to be evaluated immediately, and its result must >> be stored in some temporary memory location. (There is no notion of >> first-class dynamic environments in Common Lisp, so there is no >> other way of ensuring that the :initform can be evaluated in the >> correct dynamic environment.) > > No. You may immediately capture the lexical environment in a closure > `(lambda () ,initform). But that does not keep the /dynamic/ environment, as required by the DEFCLASS specification. Am I missing something obvious? Best wishes Svante -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk0oa6QACgkQFZBb0npmKsyuVgCdGuuKTQbCorsLVDq+AhYA2dAs 1s8An01H8PfB6tD6zlDtYl0eGs11wzoa =pAhh -----END PGP SIGNATURE----- _______________________________________________ pro mailing list [email protected] http://common-lisp.net/cgi-bin/mailman/listinfo/pro
