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Path: ...!weretis.net!feeder9.news.weretis.net!news.quux.org!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: Janis Papanagnou <janis_papanagnou+ng@hotmail.com> Newsgroups: comp.lang.c Subject: Re: That depends... (Was: Regarding assignment to struct) Date: Mon, 5 May 2025 12:30:02 +0200 Organization: A noiseless patient Spider Lines: 25 Message-ID: <vva3vc$96h2$1@dont-email.me> References: <vv338b$16oam$1@dont-email.me> <51ba1k5h5lkj75qvfuj0ferlddpb6bi0n8@4ax.com> <vv3art$2ku6u$1@news.xmission.com> <vv3qkc$2b7nd$1@dont-email.me> <20250502211854.795@kylheku.com> <20250502220618.480@kylheku.com> MIME-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Injection-Date: Mon, 05 May 2025 12:30:05 +0200 (CEST) Injection-Info: dont-email.me; posting-host="539f33e7a63020ae1bdbd3fb34730567"; logging-data="301602"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+2SNBac/SDIeLRpo5sEOf5" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 Cancel-Lock: sha1:KAvJk9lIplVLInLpOBJySxsY/us= In-Reply-To: <20250502220618.480@kylheku.com> X-Enigmail-Draft-Status: N1110 Bytes: 2162 On 03.05.2025 07:11, Kaz Kylheku wrote: > > Expanding on this point, C++ goes to town with pass-by-value interfaces > involving objects. For instance the std::basic_string template allows > C++ programs to treat dynamic strings as just values to be tossed > around: > > std::string path_combine(std::string dir, std::string name) > { > return dir + "/" + name; > } Hmm.. - my C++ days were long ago but I seem to recall that the suggestion for passing non-trivial objects by-value was that they should instead be passed by 'const &' (as a "quasi-by-value") for performance reasons. > C++ experience informs us that you can get away with doing this > with PODs (plain old datatypes---structs with no constructors > or destructors) only to a point. But in C, that's all you have. > > [...] Janis