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From: rpk@rice-chex.ai.mit.edu (Robert Krajewski)
Newsgroups: comp.std.c++
Subject: new[] and constructor arguments
Message-ID: <10647@life.ai.mit.edu>
Date: 12 Sep 90 17:57:01 GMT
Sender: news@ai.mit.edu
Organization: MIT Artificial Intelligence Laboratory
Lines: 18

Does anybody else consider the fact that new[] only works with default
constructors (i.e., those with no parameters) to be a blemish on the
language ?  If you spend some time generate a nice simple consistent
class, and then discover you need to use new[], you have to then go
and implement modification operations that may be have been
unneccessary before.

There are workarounds, I realize, like writing your own loop and using
operator new (size_t, void *).  Basically, I don't buy the argument in
the bulletted item on page 61 of E&S (section 5.3.3).  The compiler
can easily generate correct and efficient initialization code for this
case where parameters are passed.  The only decision to be made is how
many times the arguments to a constructor are evaluated in such a
context.


Robert P. Krajewski
Internet: rpk@ai.mit.edu ; Lotus: robert_krajewski.lotus@crd.dnet.lotus.com