Merge #5270

5270: Add argument count mismatch diagnostic r=matklad a=jonas-schievink

Closes https://github.com/rust-analyzer/rust-analyzer/issues/4025.

This currently has one false positive on this line, where `max` is resolved to `Iterator::max` instead of `Ord::max`:

https://github.com/rust-analyzer/rust-analyzer/blob/8aa10c00a4c5b957d459fac5a103cd9688e8dcdd/crates/expect/src/lib.rs#L263

(I have no idea why it thinks that `usize` is an `Iterator`)

TODO:
* [x] Tests
* [x] Improve diagnostic text for method calls

Co-authored-by: Jonas Schievink <[email protected]>

1 files changed, 3 insertions, 1 deletions

diff --git a/crates/ra_hir/src/diagnostics.rs b/crates/ra_hir/src/diagnostics.rs
index c82883d0c..11a0ecb8b 100644
--- a/crates/ra_hir/src/diagnostics.rs
+++ b/crates/ra_hir/src/diagnostics.rs
@@ -1,4 +1,6 @@
 //! FIXME: write short doc here
 pub use hir_def::diagnostics::UnresolvedModule;
 pub use hir_expand::diagnostics::{AstDiagnostic, Diagnostic, DiagnosticSink};
-pub use hir_ty::diagnostics::{MissingFields, MissingMatchArms, MissingOkInTailExpr, NoSuchField};
+pub use hir_ty::diagnostics::{
+    MismatchedArgCount, MissingFields, MissingMatchArms, MissingOkInTailExpr, NoSuchField,
+};