Merge #6582

6582: Fill the diagnostic code field in publish_diagnostics r=kjeremy a=Veykril

Fixes #6580
Before:
![Code_znn6VgLLH9](https://user-images.githubusercontent.com/3757771/99408084-213f7100-28f0-11eb-8317-3f5c2b93313d.png)
After:
![Code_c4jJsvzOEA](https://user-images.githubusercontent.com/3757771/99408096-23093480-28f0-11eb-9bb2-8ebf2fb3d5a1.png)


Co-authored-by: Lukas Wirth <[email protected]>

1 files changed, 3 insertions, 1 deletions

diff --git a/crates/hir/src/diagnostics.rs b/crates/hir/src/diagnostics.rs
index c18c1c587..d9ad8db6f 100644
--- a/crates/hir/src/diagnostics.rs
+++ b/crates/hir/src/diagnostics.rs
@@ -1,6 +1,8 @@
 //! FIXME: write short doc here
 pub use hir_def::diagnostics::{InactiveCode, UnresolvedModule};
-pub use hir_expand::diagnostics::{Diagnostic, DiagnosticSink, DiagnosticSinkBuilder};
+pub use hir_expand::diagnostics::{
+    Diagnostic, DiagnosticCode, DiagnosticSink, DiagnosticSinkBuilder,
+};
 pub use hir_ty::diagnostics::{
     IncorrectCase, MismatchedArgCount, MissingFields, MissingMatchArms, MissingOkInTailExpr,
     NoSuchField,