This required changing almost all users of hashmaps to import the hashmap interface first.
The `size` member in the hashmap structure was renamed to `count` to work around a name conflict.
Programs using classes with fields only (no methods) compile and run,
as long as nothing refers to a class in a different crate (todo).
Also changed the AST representation of classes to have a separate
record for constructor info (instead of inlining the fields in the
item_class node), and fixed up spans and pretty-printing for
classes.
The prestate for calls was getting set incorrectly to the poststate for the operator
in the call. This worked before since most of the time, operator expressions are
pure. Issue 1895 shows how this breaks when the operator is a closure that has a
move-in capture clause.
(I had a several-day, multi-file patch for this that didn't work... and then it
turned out to be a one-line fix. The joys of programming.)
Closes#1895
Class tests aren't working yet, but they fail a little later :-)
Also, make the parser correctly set a constructor's result type to
its enclosing class type.
Issue #352Closes#1720
The old checker would happily accept things like 'alt x { @some(a) { a } }'.
It now properly descends into patterns, checks exhaustiveness of booleans,
and complains when number/string patterns aren't exhaustive.
This allows you to take the value of, for example, `[1].len`, or bind
it with `bind x.map(_)` syntax.
I'm holding off on implementing this for dynamic methods (those on
bounded type parameters or iface types) until it's clearer what we
will do with monomorphization.
Issue #435
It would fail to start out with a fresh scope when going over
a loop or block function for the second time, and thus not
recognize last uses of locals defined inside the block.
Closes#1818
