1 files changed, 27 insertions, 0 deletions

diff --git a/crates/hir_def/src/diagnostics.rs b/crates/hir_def/src/diagnostics.rs
new file mode 100644
index 000000000..2e38a978f
--- /dev/null
+++ b/crates/hir_def/src/diagnostics.rs
@@ -0,0 +1,27 @@
+//! Diagnostics produced by `hir_def`.
+
+use std::any::Any;
+
+use hir_expand::diagnostics::Diagnostic;
+use syntax::{ast, AstPtr, SyntaxNodePtr};
+
+use hir_expand::{HirFileId, InFile};
+
+#[derive(Debug)]
+pub struct UnresolvedModule {
+    pub file: HirFileId,
+    pub decl: AstPtr<ast::Module>,
+    pub candidate: String,
+}
+
+impl Diagnostic for UnresolvedModule {
+    fn message(&self) -> String {
+        "unresolved module".to_string()
+    }
+    fn display_source(&self) -> InFile<SyntaxNodePtr> {
+        InFile::new(self.file, self.decl.clone().into())
+    }
+    fn as_any(&self) -> &(dyn Any + Send + 'static) {
+        self
+    }
+}