C Language, contents in a Void pointer

contents in a Void pointer

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vect #1 / 4	contents in a Void pointer I want to know is there any function exist in C,to know what is the type of the content in a void pointer at runtime. i want both the fundamental data types and also the derived data types. thanks in advance vector
Sun, 27 Jun 2004 21:54:36 GMT

Joona I Palast #2 / 4	contents in a Void pointer Quote: > I want to know is there any function exist in C,to know what is the type > of the content in a void pointer at runtime. > i want both the fundamental data types and also the derived data types. Impossible. The standard C type system is an entirely compile-time concept. The compiled code, at run-time, deals straight with bits, bytes and memory accesses. No type information whatsoever is stored in memory unless you yourself write C code to do that. -- \| Kingpriest of "The Flying Lemon Tree" G++ FR FW+ M- #108 D+ ADA N+++\| \| http://www.helsinki.fi/~palaste W++ B OP+ \| \----------------------------------------- Finland rules! ------------/ "I am looking for myself. Have you seen me somewhere?" - Anon
Sun, 27 Jun 2004 21:56:50 GMT

k.. #3 / 4	contents in a Void pointer Quote: > I want to know is there any function exist in C,to know what is the type > of the content in a void pointer at runtime. There is no such function in C. Quote: > i want both the fundamental data types and also the derived data types. Twice disappointed. You have to remember it for yourself (wholesale, or not, as you choose). -- Chris "allusive" Dollin C FAQs at: http://www.faqs.org/faqs/by-newsgroup/comp/comp.lang.c.html
Sun, 27 Jun 2004 21:58:48 GMT

Lawrence Kir #4 / 4	contents in a Void pointer On 9 Jan, in article Quote: >I want to know is there any function exist in C,to know what is the type >of the content in a void pointer at runtime. The type of the value stored in a void * object is void . void has the property that you can convert a pointer to any type (except pointers to functions) to void * and back again to the original type and you get back the original value. But there are clear conversion steps involved, void * does not store pointers of other types. It is up to you to specify the apropriate type in the source code when converting back from void *. Quote: > i want both the fundamental data types and also the derived data types. Then you will have to make a record of them yourself and pass that around to whatever code needs it. -- ----------------------------------------- -----------------------------------------
Sun, 27 Jun 2004 22:27:55 GMT

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