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build: syntax check to avoid 'const fooPtr'

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'const fooPtr' is the same as 'foo * const' (the pointer won't
change, but it's contents can).  But in general, if an interface
is trying to be const-correct, it should be using 'const foo *'
(the pointer is to data that can't be changed).

Now that the code base has been cleaned, enforce it with a syntax
checker.

* cfg.mk (sc_forbid_const_pointer_typedef): New rule.

Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Eric Blake 2013-09-24 10:41:54 -06:00
parent 33aec50684
commit e79810162a
1 changed files with 8 additions and 0 deletions
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8
cfg.mk
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@ -468,6 +468,14 @@ sc_correct_id_types:
halt="use pid_t for pid, uid_t for uid, gid_t for gid" \
$(_sc_search_regexp)
# "const fooPtr a" is the same as "foo * const a", even though it is
# usually desired to have "foo const *a". It's easier to just prevent
# the confusing mix of typedef vs. const placement.
sc_forbid_const_pointer_typedef:
@prohibit='(^|[^"])const \w*Ptr' \
halt='"const fooPtr var" does not declare what you meant' \
$(_sc_search_regexp)
# Forbid sizeof foo or sizeof (foo), require sizeof(foo)
sc_size_of_brackets:
@prohibit='sizeof\s' \