On 11/07/14 09:41, Jeff King wrote:
> Here's a series to address the bug I mentioned earlier by catching the
> conversion of OBJ_NONE to OBJ_COMMIT in a central location and setting
> the index there.
> I've included your patch 1/2 unchanged in the beginning, as I build on
> top of it (and your patch 2/2 is no longer applicable). The rest is
> refactoring leading up to patch 6 to fix the bug. Patch 7 is a bonus
I have just read this series in my email client (I will apply and test
them later), but this looks very good to me. :)
Only one patch gave me slight pause; see later.
> I'd hoped to cap off the series by converting the "type" field of
> "struct commit" to a "const unsigned type : 3", which would avoid any
> new callers being added that would touch it without going through the
> proper procedure. However, it's a bitfield, which makes it hard to cast
> the constness away in the actual setter function. My best attempt was to
> use a union with matching const and non-const members, but that would
> mean changing all of the sites which read the field (and there are many)
> to use "object->type.read".
> There may be a clever solution hiding in a dark corner of C, but I
> suspect we are entering a realm of portability problems with older
> compilers (I even saw one compiler's documentation claim that "const"
> was forbidden on bitfields, even though C99 has an example which does
Yes, I've come across such compilers too; I wouldn't go there! ;-P
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