| Topic: |
DEVELOP > c-Plus-Plus |
| User: |
"Jeremy Bishop" |
| Date: |
12 Nov 2003 05:24:41 AM |
| Object: |
Mixing C/C++ and Func. Names |
Hi,
I have a strange error... I am using a C lib with my C++ code. One of the C
lib functions requires a non-member callback function pointer defined by the
following typedef:
typedef void (*Callback)(void *userData, const char *name, const char
**atts);
I defined a function with this prototype, and marked its declaration with
extern "C". The problem is, when my callback function name begins with a
capitol letter, the compiler complains that the function pointer that I pass
cannot be converted to the expected typedef.... but, and here's the kicker,
when the function name begins with a lower-case letter, it works. Am I
going insane here? Any input on this would be helpful,
Thanks
Jeremy
.
|
|
| User: "Catalin Pitis" |
|
| Title: Re: Mixing C/C++ and Func. Names |
12 Nov 2003 06:00:43 AM |
|
|
It is ok like this.
As I understood from your message, if you are saying something like:
SomeFunction( param1, Callback)
it should give you an error (assuming that SomeFunction is the function that
accepts a callback function pointer), because you specified a type as a
parameter, and not a pointer to a function.
If you say something like:
SomeFunction( param1, callback)
it should be ok, assuming that callback is an existing function with the
same signature as Callback typedef specifies.
I didn't see your code, but these are possibilities that I see.
Catalin
"Jeremy Bishop" <jeremy@edg.eu.com> wrote in message
news:bot59i$kst$07$1@news.t-online.com...
Hi,
I have a strange error... I am using a C lib with my C++ code. One of the
C
lib functions requires a non-member callback function pointer defined by
the
following typedef:
typedef void (*Callback)(void *userData, const char *name, const char
**atts);
I defined a function with this prototype, and marked its declaration with
extern "C". The problem is, when my callback function name begins with a
capitol letter, the compiler complains that the function pointer that I
pass
cannot be converted to the expected typedef.... but, and here's the
kicker,
when the function name begins with a lower-case letter, it works. Am I
going insane here? Any input on this would be helpful,
Thanks
Jeremy
.
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