From 2676073372780046340 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f78e5,cabfc5c4a464a339 X-Google-Attributes: gidf78e5,public From: carson@gwis2.circ.gwu.edu (John Carson) Subject: Re: Statics and in-lines Date: 1995/04/28 Message-ID: <3nr6tu$99t@cronkite.seas.gwu.edu>#1/1 X-Deja-AN: 101764425 references: <3nb5vm$4au@cronkite.seas.gwu.edu> organization: The George Washington University, Washington DC newsgroups: comp.std.c++ John Max Skaller (maxtal@Physics.usyd.edu.au) wrote: : In article <3nb5vm$4au@cronkite.seas.gwu.edu>, : John Carson wrote: : >I suspect this has been discussed before but I believe it is not valid to : >define an in-line function that contains a static. Am I correct and for : >purposes of learning, where would one find the answer in the ARM or draft : >standard? : It is valid to have local static variables in any function. : If the function is inline or inclass, then: : 1) If the function has internal linkage then each translation : unit has a distinct function and the local statics are distinct : 2) If the function has external linkage then there is only : one function in any translation unit and only one static : variable. : FYI: these rules are not in the ARM. A new rule you should know : about is that ALL non-local classes effectively have external linkage : and ALL member functions of such classes also (effectively) have external : linkage. : That is, effectively linkage is "inherited" by all : nested entities. This is NOT true for inheritance by the way, : in fact the reverse is true: a class derived from a class : with external linkage can have internal linkage BUT a class : derived from a class with internal linkage must have internal : linkage. (This can happen only if the derived class is local : to a function) : It isn't clear the WP correctly states these rules yet. : -- : JOHN (MAX) SKALLER, INTERNET:maxtal@suphys.physics.su.oz.au : Maxtal Pty Ltd, : 81A Glebe Point Rd, GLEBE Mem: SA IT/9/22,SC22/WG21 : NSW 2037, AUSTRALIA Phone: 61-2-566-2189 Wow, I think it is easier to build a dummy class that contains a static and then make a friend function for it to accomplish the desired result. John C.