rustc: Add support for `extern crate foo as bar`

The compiler will now issue a warning for crates that have syntax of the form
`extern crate "foo" as bar`, but it will still continue to accept this syntax.
Additionally, the string `foo-bar` will match the crate name `foo_bar` to assist
in the transition period as well.

This patch will land hopefully in tandem with a Cargo patch that will start
translating all crate names to have underscores instead of hyphens.

cc #23533

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libsyntax/parse/mod.rs b/src/libsyntax/parse/mod.rs
index 968d2fd7e2a..4e851761212 100644
--- a/src/libsyntax/parse/mod.rs
+++ b/src/libsyntax/parse/mod.rs
@@ -1060,7 +1060,7 @@ mod test {
         let vitem_s = item_to_string(&*vitem);
         assert_eq!(&vitem_s[..], ex_s);
 
-        let ex_s = "extern crate \"foo\" as bar;";
+        let ex_s = "extern crate foo as bar;";
         let vitem = string_to_item(ex_s.to_string()).unwrap();
         let vitem_s = item_to_string(&*vitem);
         assert_eq!(&vitem_s[..], ex_s);