Re: Porting C to C++

From:
Ulrich Eckhardt <eckhardt@satorlaser.com>
Newsgroups:
comp.lang.c++.moderated
Date:
Tue, 26 May 2009 11:06:43 CST
Message-ID:
<qrgse6-g7l.ln1@satorlaser.homedns.org>
Goran wrote:

Yes, write
p = new xxx;


I think that's a bad idea. Current behavior of the macro is to
terminate the process, whereas operator new will throw.


Right, using

   p = new (std::nothrow) xxx;

should work though (If I remember the syntax right, that is...).

This is not the same as terminating. It's a change in behavior, which
the rest of the code may not like nor handle well (terminating on OOM
in any code is not a practice I would use, but I do feel for people who
handle heap in C code ;-) )

I am saying this because chances are, Paul's (original poster's)
"porting" is nothing much but "make this compile under a C++
compiler". If that's so, introducing a C++ artifact that may throw is
going to bring more harm than good - code not aware of exceptions
needs a significant rewrite to put exceptions in.


Simply not compiling it as C++ would be my first choice. If you need to
interface to it from C++, you can still "fix" the C headers by adding
necessary 'extern "C"' clauses and other things that prevent their use.

Uli

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