make @itr optimizations default in core

[holocronweaver]

By default, Python 3 uses iterators for loop operations like zip and enumerate. Thus there is no need for a macro like @itr. I am new to Julia and have difficulty understanding why the default behavior would not use iterators. Are there any plans for Julia core to make a similar transition to iterator-only loops like Python did?

Thanks!

[StefanKarpinski]

This kind of question is more appropriate as a question on julia-users. Would you mind posting it there?

[holocronweaver]

Thanks, posted on julia-users - currently awaiting moderation.