In lib/vector/dglib/graph.h there is __BEGIN_DECLS (near top) and __END_DECLS (at bottom).
Are these needed?
What do they do?
John
In cdefs.h, they are defined like so:
/* C++ needs to know that types and declarations are C, not C++. */
#ifdef __cplusplus
# define __BEGIN_DECLS extern "C" {
# define __END_DECLS }
#else
# define __BEGIN_DECLS
# define __END_DECLS
#endif
So standard C++ name de-mangling. Not needed, won't hurt.
So I broke 2 rules: I posted in HTML (oops, Windows default)
I wasted bandwidth on a question I really COULD find
on the web.
I'm sorry.
John
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Subject: [GRASS-dev] __BEGIN_DECLS
In lib/vector/dglib/graph.h there is __BEGIN_DECLS (near top)
and __END_DECLS (at bottom).
Are these needed?
What do they do?
John
John Gillette wrote:
In lib/vector/dglib/graph.h there is __BEGIN_DECLS (near top) and
__END_DECLS (at bottom).Are these needed?
No.
What do they do?
They are defined like so in type.h:
#ifdef __cplusplus
# define __BEGIN_DECLS extern "C" {
# define __END_DECLS }
#else
# define __BEGIN_DECLS /* empty */
# define __END_DECLS /* empty */
#endif
Essentially, they allow the header to be used in C++ code. As the
rest of GRASS doesn't do this, there doesn't seem much point doing it
in a few specific headers.
--
Glynn Clements <glynn@gclements.plus.com>