[umanwizard]

Rust doesn’t have quite as strong compatibility guarantees. For example, it’s not considered a NC-breaking change to add new methods to standard library types, even though this can make method resolution ambiguous for programs that had their own definitions of methods with the same name. A C++ implementation claiming to support C++11 wouldn’t do that, they’d use ifdefs to gate off the new declarations when compiling in C++11 mode.

[tialaramex]

That's a good point about the #ifdefs thanks.

[umanwizard]

Too late to edit but I meant BC not NC

[tialaramex]

Thanks, that was easily the most confusing thing and I was like well... I understand everything else, if it's very important what exactly "NC-breaking" means I'm sure I will realise later.