Parser inconsistency in for loop iter expression place

[makoConstruct]

http://is.gd/4PtH5V

[huonw]

This is by design; the for _ A { i: 3 }.iter() { version is parsing the A (by itself) as the iterator, with the following { the start of the body of the loop. This is important to allow things like

let iter = ...;
for _ in iter { ... }

without requiring disambiguating parens: for _ in (iter) { ... }. We chose this arrangement because we felt that for _ in identifier { ... } and if identifer { ... } (etc.) were more common than constructing a struct directly in the iterator/condition.

Thanks for filing!