compile error

[Jim Strathmeyer]

(if this is OT, please let me know where to post it)

Basically I'm trying to 'g++ -c a.cpp' which includes a.h. a.h includes
some things, including b.h, which includes c.h (each header defining
classes A, B, and C, respectively.) Now, C inherits B, but as you can see
by the string of events above, by the time it gets to 'class C : public B'
B hasn't been defined yet.

I also have the same where the same situation happens and class C
has a member of type B or A.

Is there any elegant solution to this?

Is there a precompile/linking/whatever tutorial anywhere?

 

[Victor Bazarov]

(if this is OT, please let me know where to post it)

Basically I'm trying to 'g++ -c a.cpp' which includes a.h. a.h includes
some things, including b.h, which includes c.h (each header defining
classes A, B, and C, respectively.) Now, C inherits B, but as you can see
by the string of events above, by the time it gets to 'class C : public B'
B hasn't been defined yet.

Sounds wrong. If C inherits B, why does b.h include c.h? It seems that
the reverse inclusion is in order.

I also have the same where the same situation happens and class C
has a member of type B or A.

If C has a member of type A, then c.h should include a.h. If C has
a member of type B, then c.h should include b.h. Same problem, same
solution.

Is there any elegant solution to this?

How about you read the FAQ first, and then follow the recommendations
put forth in 5.8... You can find FAQ Lite if you visit
http://www.parashift.com/c++-faq-lite/ .

Is there a precompile/linking/whatever tutorial anywhere?

Probably. I don't know of any, though.

V