Re: K&R Exercise 6-2

Harald van Dijk wrote:
On Fri, 29 Aug 2008 16:51:56 +0200, August Karlstrom wrote:
Richard Heathfield wrote:
[...]
In C90, an implementation must be able to distinguish between external
identifiers that are unique in the first 6 characters (without regard
to case!). A program such as the one required in Exercise 6-2 could be
useful for diagnosing source code that ignores this limit (as I suspect
a vast amount of source code does).
So a library which exports e.g. the identifiers string_prepend and
string_append are not really C90 compliant?

Correct. However, they are already not C90 compliant -- and not C99 compliant either -- for another reason: external identifiers starting with str and followed by a lowercase letter are reserved for the implementation.

Annoying. Is there a way to make a compiler like GCC emit a warning in this case?


August
.

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