Erik Wikstrm wrote:
> On Feb 12, 3:24 pm, "Victor Bazarov" <v.Abaza@comAcast.net> wrote:
>> Shug wrote:
>>> We're reformatting a lot of our project code using the excellent
>>> uncrustify beautifier.

>>> However, to gain confidence that it really is only changing
>>> whitespace (forget { } issues for just now), we were hoping to do a
>>> diff - a textual comparison of the files, ignoring whitespace.

>>> However, most diffs we've tried can't handle multi-line whitespace,
>>> so the following two
>>> prototypes are deemed to be different:

>>> void doStuff( int a, float b);

>>> void doStuff(int a,
>>>                  float b);

>>> Has anyone found a way to do a diff like this, that handles
>>> multi-line whitespace?

>> I would actually do it differently: tokenize both sources.  If the
>> set of tokens is the same, you have the same source (now, don't ask
>> me where you can find C++ tokenizers, I don't know, GIYF).  The
>> other way is to convert both of those into the third type of
>> formatting (which should give you the exactly same output) and
>> compare them.  If the formatter make mistakes, it's likely to make
>> them independently.

> A simple third format would be one where every whitespace is replaced
> by a newline, which will give a format that is easy to compare (and I
> think it will still be valid C++ :-)