Rollup merge of #68353 - Centril:code-liberation, r=petrochenkov

Remove `rustc_error_codes` deps except in `rustc_driver`

Remove dependencies on `rustc_error_codes` in all crates except for `rustc_driver`.

This has some benefits:

1. Adding a new error code when hacking on the compiler only requires rebuilding at most `rustc_error_codes`, `rustc_driver`, and the reflexive & transitive closure of the crate where the new error code is being added and its reverse dependencies. This improves time-to-UI-tests (TTUT).

2. Adding an error description to an error code only requires rebuilding `rustc_error_codes` and `rustc_driver`. This should substantially improve TTUT.

r? @petrochenkov
cc @rust-lang/wg-diagnostics

1 files changed, 1 insertions, 9 deletions

diff --git a/src/librustc_error_codes/lib.rs b/src/librustc_error_codes/lib.rs
index 14210fd69ad..f051fdd11b8 100644
--- a/src/librustc_error_codes/lib.rs
+++ b/src/librustc_error_codes/lib.rs
@@ -6,16 +6,8 @@ macro_rules! register_diagnostics {
         pub static DIAGNOSTICS: &[(&str, &str)] = &[
             $( (stringify!($ecode), $message), )*
         ];
-
-        $(
-            pub const $ecode: () = ();
-        )*
-        $(
-            pub const $code: () = ();
-        )*
     )
 }
 
 mod error_codes;
-
-pub use error_codes::*;
+pub use error_codes::DIAGNOSTICS;