Shortcut for accessing build-in struct

[kenchu.osu]

Hi folks,

I have a question about accessing the member of a build-in struct.

Eg.

struct {
struct {
int x;
int y;
} pt;
int ...
...
} info;

I remember there is a method to simplify the access of info.pt.x using
info.x, but I cannot recall that. Can you guys help me with that?

Thanks a lot.

Best,
Ken

 

[Eric Sosman]

Hi folks,

I have a question about accessing the member of a build-in struct.

Eg.

struct {
struct {
int x;
int y;
} pt;
int ...
...
} info;

I remember there is a method to simplify the access of info.pt.x using
info.x, but I cannot recall that. Can you guys help me with that?

Some compilers allow "anonymous" struct elements, but
this is not permitted in Standard C (except for a special
case involving bit-fields, not applicable here).

You could play preprocessor games, like

#define X(s) ((s).pt.x)

.... but in my experience such tricks are usually more
trouble than they're worth.