Re: [PATCH] support ptrdiff_t if it has the same storage size as int, but does not alias it

Robin:

> I disagree. NetBSD and Haiku aren't violating the C/C++ standards. Also,
> authors of future libcs/platforms might well not be aware that you think that
> ptrdiff_t should alias int under certain conditions and cause the same issue.

   The standards allow lots of weird choices like defining NULL to not
be all 0 bits. Platforms that behave differently to the big 3 get to
live with the consequences of their choices.

   32-bit systems are becoming quite rare. On macOS, Scintilla went
64-bit only in 2014 and support effort would be decreased by only
supporting 64-bit platforms.

> So I prepared another version of my patch that introduces
> PTRDIFF_DOESNT_ALIAS_INT, which you may have to pass in via CXXFLAGS.

   Compile-time options should be listed in the table in the "Building
Scintilla" section at the end of doc/ScintillaDoc.html.

   Neil

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