Containers library

One question for you /prog/!

Suppose you have a brand new language, which doesn't have any library yet. Which kind of basic containers / data structure would you expect?

>>44
AFAIK Common Lisp used to have similar problems, with certain compilers/interpreters claiming compliance without supporting e.g. hash maps. Implementors just don't seem to care whether it's in the spec; 'libraries are optional' seems to be the overriding mentality.

I thought they had a similar situation pre-CL, which is why CL was made. I haven't heard of anything which is so non-compliant. What people whine about today are things like missing a MOP feature here and there, inconsistent threading APIs, or FFIs. Besides the MOP, those things are not standarized, which is why people have developed compatiblity layers/libraries to act as a defacto standard for those wanting such features.