Digest for comp.lang.c++@googlegroups.com - 5 updates in 3 topics

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• Comparison operator used in STL/deque - 3 Updates
• Copy and move the member object - 1 Update
• legal UTF-8 characters in Identifiers ? - 1 Update

Comparison operator used in STL/deque

red floyd <no.spam.here@its.invalid>: Apr 07 07:50PM -0700 > when comparing STL containers containing ci_string it didn't.   > Sometimes I can understand why some people just give up with C++ and use > something else. It really shouldn't be this hard to do something this simple.   Technically it uses std::less, not "operator <". The Standard permits specializing std::less for your type.

Bonita Montero <Bonita.Montero@gmail.com>: Apr 08 03:49PM +0200 Am 07.04.2023 um 05:13 schrieb Bonita Montero:   > { >     return str << out.c_str(); > }   Or better this:   template<typename CharT, typename StreamTraits, typename StringTraits, typename Alloc> basic_ostream<CharT, StreamTraits> &operator <<( basic_ostream<CharT, StreamTraits> &str, basic_string<CharT, StringTraits, Alloc> const &out ) { return str << basic_string_view<CharT, StreamTraits>( out.cbegin(), out.cend() ); }

Bonita Montero <Bonita.Montero@gmail.com>: Apr 08 05:14PM +0200 Am 08.04.2023 um 15:49 schrieb Bonita Montero:   >     return str << basic_string_view<CharT, StreamTraits>( out.cbegin(), > out.cend() ); > }   Or how about that:   template<typename CharT, typename StreamTraits, typename Container> requires random_access_iterator<decltype(Container().cbegin())> && same_as<iter_value_t<decltype(Container().cbegin())>, CharT> && random_access_iterator<decltype(Container().cend())> && same_as < iter_value_t<decltype(Container().cend())>, CharT> basic_ostream<CharT, StreamTraits>& operator <<( basic_ostream<CharT, StreamTraits>& str, Container const &out ) { return str << basic_string_view<CharT, StreamTraits>(out.cbegin(), out.cend()); }   With that you could even print a vector of chars without any additional effort.

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Copy and move the member object

Jorgen Grahn <grahn+nntp@snipabacken.se>: Apr 08 08:38AM On Tue, 2023-03-28, Paavo Helde wrote:   > If anything, naming both the member and the constructor parameter with > the same name does not help readability (but works as intended, in the > member initialization list).   I'm more worried by the lack of "explicit". Given the names "Item" and "Container", the OP probably doesn't want one to confuse them.   /Jorgen   -- // Jorgen Grahn <grahn@ Oo o. . . \X/ snipabacken.se> O o .

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legal UTF-8 characters in Identifiers ?

Jorgen Grahn <grahn+nntp@snipabacken.se>: Apr 08 08:33AM On Mon, 2023-04-03, Anssi Saari wrote:   > And that's where we disagree. AltGr with anything isn't fast or easy in > my opinion, it's good for those symbols used once a month or > thereabouts. I get you don't get it, moving on.   You're not disagreeing; you obviously use keyboards differently and you're both happy with your setups.   Personally I'm in the US camp. If I had to work with a Swedish layout I'd be slowed down and distracted -- when writing C++ code, but mainly when doing Unix command line things.   /Jorgen   -- // Jorgen Grahn <grahn@ Oo o. . . \X/ snipabacken.se> O o .

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