add struct support

[UnusualEgg]

uses var a = [ .foo = bar ]; syntax. Nested structs give a segfault for some reason though. #39

[ikskuh]

Wow, not bad!

Nested structs give a segfault for some reason though.

That might be because the load/store sequence is broken, but i'm not sure.

a.b.c = 10;

must perform a struct_load, struct_load, push 10, struct store, struct store, write local which might break.

I'm fine with this, we can just say it's a problem and we're fine with it for now.

[ikskuh]

Potential memory leak here when arr.allocator.dupe fails to clone the key.

You gotta construct both locally first and errdefer-free them, then put the key/value pair

[UnusualEgg]

putAssumeCapacity can't fail. You would just need to errdefer duped_key.deinit() before adding the key and value to arr

[ikskuh]

even then, it's a bug right now :)

i'd just use two errdefers, and make it so that future expansions dont have to think about the cleanup.

the compiler won't emit the second errdefer anyways until there's an error

[UnusualEgg]

Suggested change

	arr.contents.putAssumeCapacity(try arr.allocator.dupe(u8, entry.key_ptr.*), try entry.value_ptr.clone());
	const duped_key = try arr.allocator.dupe(u8, entry.key_ptr.*);
	errdefer arr.allocator.free(duped_key);
	arr.contents.putAssumeCapacity(duped_key, try entry.value_ptr.clone());