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- From: kanze@gabi-soft.fr (J. Kanze)
- Message-ID: <KANZE.96Apr10111924@gabi.gabi-soft.fr>
- X-Original-Date: 10 Apr 1996 09:19:24 GMT
- Path: in2.uu.net!bounce-back
- Date: 10 Apr 96 11:20:18 GMT
- Approved: fjh@cs.mu.oz.au
- Newsgroups: comp.std.c++
- Subject: Re: C++ syntactic trap
- Organization: GABI Software, Sarl.
- References: <4k3q4p$lkd@syn.cs.cornell.edu> <4kcrhk$aj1@hermes.acs.unt.edu>
- In-Reply-To: johnw@jove.acs.unt.edu's message of 09 Apr 1996 09:59:37 PDT
- X-Auth: PGPMoose V1.1 PGP comp.std.c++
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- In article <4kcrhk$aj1@hermes.acs.unt.edu> johnw@jove.acs.unt.edu (John
- R. Williams) writes:
-
- [Concerning a warning for `new char( 10 )'...]
- |> I agree that it is uusual to allocate a single object of a built-in type
- |> this way, but how do you propose to write this in such a way that such a
- |> warning would not be generated? All I can think of is to warn when *any*
- |> conversion occurs (this one looks pretty explicit to me), forcing you to
- |> write something like this:
-
- |> char *foo = new char(static_cast<char>(10));
-
- |> (Actually this rule doesn't seem too bad if applied only to built-in
- |> types...)
-
- Let's see:
-
- int* pi = new int( static_cast< int >( 10 ) ) ;
-
- Do you want the compiler to warn if you omit the static_cast (of int to
- int)?
-
- I do not think that I have a single instance of allocation of an array
- in any of my code. Why should you make the most frequent case the most
- difficult. (And allocating a single int is not that infrequent. You
- might look at the implementation of counted_ptr in Barton and Nackman,
- for example. It is certainly more frequent than allocating an array of
- int's, at least in well written C++ code.)
- --
- James Kanze (+33) 88 14 49 00 email: kanze@gabi-soft.fr
- GABI Software, Sarl., 8 rue des Francs Bourgeois, 67000 Strasbourg, France
- Conseils en informatique industrielle --
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