It looks like the ecl reader will create automatically hidden package when reading qualified symbols naming inexistant packages.
I can't find anything in CLHS that prevents this behavior, but it's highly unexpected. It just made me lose one hour on a typo. I think this 'feature' should be optional (off by default), and be documented as an extension to Common Lisp, if not removed at all. It is problematic that no error is signaled when reading a symbol from an inexisting package. It may also be problematic that when creating a package, it may already contain all the symbols read with this package qualification. $ ecl ECL (Embeddable Common-Lisp) 10.7.1 Copyright (C) 1984 Taiichi Yuasa and Masami Hagiya Copyright (C) 1993 Giuseppe Attardi Copyright (C) 2000 Juan J. Garcia-Ripoll ECL is free software, and you are welcome to redistribute it under certain conditions; see file 'Copyright' for details. Type :h for Help. Top level in: #<process SI:TOP-LEVEL 0000000000643f60>. > '(user-input::a) (USER-INPUT::A) > (list-all-packages) (#<"FFI" package> #<"GRAY" package> #<"MP" package> #<"CLOS" package> #<"SI" package> #<"KEYWORD" package> #<"COMMON-LISP-USER" package> #<"COMMON-LISP" package>) > (find-package "USER-INPUT") NIL > (symbol-name (first '(user-input::a))) "A" > (symbol-package (first '(user-input::a))) #<"USER-INPUT" package> > (find-package "USER-INPUT") NIL > (eq 'user-input::a 'user-input::a) T > (defvar *a* 'user-input::a) *A* > (eq *a* 'user-input::a) T > (list-all-packages) (#<"FFI" package> #<"GRAY" package> #<"MP" package> #<"CLOS" package> #<"SI" package> #<"KEYWORD" package> #<"COMMON-LISP-USER" package> #<"COMMON-LISP" package>) > (defpackage "USER-INPUT") #<"USER-INPUT" package> > *a* USER-INPUT::A > (list-all-packages) (#<"USER-INPUT" package> #<"FFI" package> #<"GRAY" package> #<"MP" package> #<"CLOS" package> #<"SI" package> #<"KEYWORD" package> #<"COMMON-LISP-USER" package> #<"COMMON-LISP" package>) > (find-symbol "A" (find-package "USER-INPUT")) USER-INPUT::A :INTERNAL > (eq *a* (find-symbol "A" (find-package "USER-INPUT"))) T > -- __Pascal Bourguignon__ http://www.informatimago.com/ ------------------------------------------------------------------------------ Sell apps to millions through the Intel(R) Atom(Tm) Developer Program Be part of this innovative community and reach millions of netbook users worldwide. Take advantage of special opportunities to increase revenue and speed time-to-market. Join now, and jumpstart your future. http://p.sf.net/sfu/intel-atom-d2d _______________________________________________ Ecls-list mailing list Ecls-list@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ecls-list
