Poor error when iterator name missing in for loop

[jdm]

Currently, if you write a loop like this:
for (type in named_list) {}

you get this message:

error: expecting in, found named_list

which is really obtuse. An easy heuristic to show a more informative message would be to check whether the iterator is named "in", possibly.

[marijnh]

Iterators are going. Moot.

[jdm]

Not moot, I just used the wrong terminology when creating this issue. I'm assuming for..in iteration over a vector is still part of the language?

[marijnh]

The syntax for for has changed completely. The thing you're showing there was valid once. Then parens became forbidden in for statements. Now, it tries to parse (type in named_list) as a tuple pattern and throws a parse error on that. Fact remains, this is no longer relevant.