Calling native functions that take enums by value is broken

[brson]

Since switching to named structs for enums we can no longer generate code for native functions that take by-val enums because we don't handle the LLVM array type correctly in native.rs. I added some hacks to get servo building again (which uses the c_void type in some signatures), but there is a big FIXME in native.rs that says "I HAVE NO IDEA WHAT I AM DOING THIS MUST BE WRONG" in fn classify, and run-pass/native-struct is xfailed on win32.

[brson]

@crabtw contributed a fix in bdebe92 but the native-struct test case still is broken.

[Aatch]

Can we check to see if this is still broken?

[Blei]

(That test is now in run-pass/foreign-struct.rs)

[graydon]

My guess is that one of the patches @nikomatsakis landed such as efc7f82 may have fixed this. I'm not sure it's fixed but we can certainly generate code for it now. @brson : do you remember how it was broken? did it just not compile, or crash, or .. ?

[graydon]

(I just tested it and it compiles and runs on windows)

[graydon]

Filed #8173 to close this.