Bruce Momjian <pgman@candle.pha.pa.us> writes:
>> 4. This breaking of a comment attached to a #define scares me.
>>
>> ***************
>> *** 1691,1705 ****
>>
>> #define FIXED_CHAR_SEL 0.04 /* about 1/25 */
>> #define CHAR_RANGE_SEL 0.25
>> ! #define ANY_CHAR_SEL 0.9 /* not 1, since it won't match end-of-string */
>> #define FULL_WILDCARD_SEL 5.0
>> #define PARTIAL_WILDCARD_SEL 2.0
>>
>> --- 1718,1733 ----
>>
>> #define FIXED_CHAR_SEL 0.04 /* about 1/25 */
>> #define CHAR_RANGE_SEL 0.25
>> ! #define ANY_CHAR_SEL 0.9 /* not 1, since it won't match
>> ! * end-of-string */
>> #define FULL_WILDCARD_SEL 5.0
>> #define PARTIAL_WILDCARD_SEL 2.0
>>
>> ***************
> I don't see the problem here. My assumption is that the comment is not
> part of the define, right?
Well, that's the question. ANSI C requires comments to be replaced by
whitespace before preprocessor commands are detected/executed, but there
was an awful lot of variation in preprocessor behavior before ANSI.
I suspect there are still preprocessors out there that might misbehave
on this input --- for example, by leaving the text "* end-of-string */"
present in the preprocessor output. Now we still go to considerable
lengths to support not-quite-ANSI preprocessors. I don't like the idea
that all the work done by configure and c.h in that direction might be
wasted because of pgindent carelessness.
regards, tom lane
