Digest for comp.lang.c++@googlegroups.com - 2 updates in 1 topic

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• What a bug - 2 Updates

What a bug

jak <nospam@please.ty>: Sep 03 11:17PM +0200 jak ha scritto: > auto mappedPrio = opts.find( "--high" ); > to: > auto mappedPrio = opts.find( L"--high" );   mmm. This only works because the compiler uses the same area of memory as the strings are equal and therefore compares a pointer to itself when it finds the string. In fact if I replace this:   auto mappedPrio = opts.find( L"--high" );   with this other:   wchar_t what[] = L"--high"; auto mappedPrio = opts.find( what );   the search fails.   I find this sneaky. In my opinion the compiler shouldn't treat two objects as the same just because they have the same content.

"Chris M. Thomasson" <chris.m.thomasson.1@gmail.com>: Sep 03 03:25PM -0700 On 9/1/2023 9:19 PM, Bonita Montero wrote:   >>      auto mapped_opt = opts.find("--realtime");   > The problem here is that each find creates a string-object, > which is rather slow.   Right. Afaict, there is a way to create the strings on the stack and use a little adapter logic to make it work with std::unordered_map. So, no dynamic allocation.

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