Re: [Qemu-devel] [PATCH v5 04/14] qapi: Adjust names of implicit types

[Markus Armbruster]

Eric Blake <address@hidden> writes:

> The original choice of ':obj-' as the prefix for implicit types
> made it obvious that we weren't going to clash with any user-defined
> names.  But now we want to create structs for implicit types.

Why?  I know, but the commit message should still give a hint.  Perhaps:
"to get rid of special cases in the generators"?

>                                                                We
> could transliterate ':' to '_', except that C99 says that a leading
> underscore and lower-case letter should be used only for file scope
> identifiers, while we would be exposing it in qapi-types.h.  So it's

Misunderstanding!  When the standard says "identifiers that X are
reserved for Y use", it reserves these identifiers for itself and the
implementation.  You shouldn't use them for Y then.

Suggest to simply quote the standard instead of interpreting it:
... except that C99 mandates that "identifiers that begin with an
underscore are always reserved for use as identifiers with file scope in
both the ordinary and tag name spaces"

> time to change our naming convention; we can instead use the 'q_'
> prefix that we reserved for ourselves back in commit 9fb081e0.  As
> long as we don't declare 'empty' or 'obj' ticklish, it shouldn't
> clash with c_name() prepending 'q_' to the user's ticklish names.

Do we really want to rename :empty?  We're not going to generate C for
it, are we?

> Signed-off-by: Eric Blake <address@hidden>