librustc: Forbid private types in public APIs.

This breaks code like:

    struct Foo {
        ...
    }

    pub fn make_foo() -> Foo {
        ...
    }

Change this code to:

    pub struct Foo {    // note `pub`
        ...
    }

    pub fn make_foo() -> Foo {
        ...
    }

The `visible_private_types` lint has been removed, since it is now an
error to attempt to expose a private type in a public API. In its place
a `#[feature(visible_private_types)]` gate has been added.

Closes #16463.

RFC #48.

[breaking-change]

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libdebug/repr.rs b/src/libdebug/repr.rs
index 7fe6f2dbf67..e1eb2814951 100644
--- a/src/libdebug/repr.rs
+++ b/src/libdebug/repr.rs
@@ -32,7 +32,7 @@ macro_rules! try( ($me:expr, $e:expr) => (
 
 /// Representations
 
-trait Repr {
+pub trait Repr {
     fn write_repr(&self, writer: &mut io::Writer) -> io::IoResult<()>;
 }