Another convention:
when foo.h contains fields of type pointer to BLAH,
it doesn't include blah.h;
instead it declares
struct BLAH;
at the top.

foo.h needs to include blah.h only if it contains fields of type BLAH,
or otherwise needs to refer to the internals of BLAH.

-- David

On 30-Jul-2012 12:55 PM, [email protected] wrote:
>
> I agree with including headers only in the files that need them.  However,
> some headers need to include other headers.  Specifically where Header A
> uses a class or structure defined in Header B.  In that case, Header A
> needs to include Header B.  I have been on many chases trying to figure out
> why something just will not compile and discovering that the order of
> header includes changed someplace which made the definition of a class
> happen after its first use.  So the apparent law that headers should only
> be included in cpp files is a bit too strong.
>
> jm7
>
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