Keep SyntaxNodePtr::range private

crates/hir_ty/src/diagnostics.rs

@@ -267,7 +267,7 @@ impl fmt::Display for CaseType {
 #[derive(Debug)]
 pub struct IncorrectCase {
     pub file: HirFileId,
-    pub ident: SyntaxNodePtr,
+    pub ident: AstPtr<ast::Name>,
     pub expected_case: CaseType,
     pub ident_type: String,
     pub ident_text: String,
@@ -290,7 +290,7 @@ impl Diagnostic for IncorrectCase {
     }
 
     fn display_source(&self) -> InFile<SyntaxNodePtr> {
-        InFile::new(self.file, self.ident.clone())
+        InFile::new(self.file, self.ident.clone().into())
     }
 
     fn as_any(&self) -> &(dyn Any + Send + 'static) {

crates/hir_ty/src/diagnostics/decl_check.rs

@@ -213,12 +213,21 @@ impl<'a, 'b> DeclValidator<'a, 'b> {
         for param_to_rename in fn_param_replacements {
             // We assume that parameters in replacement are in the same order as in the
             // actual params list, but just some of them (ones that named correctly) are skipped.
-            let ast_ptr = loop {
+            let ast_ptr: ast::Name = loop {
                 match fn_params_iter.next() {
                     Some(element)
                         if pat_equals_to_name(element.pat(), &param_to_rename.current_name) =>
                     {
-                        break element.pat().unwrap()
+                        if let ast::Pat::IdentPat(pat) = element.pat().unwrap() {
+                            break pat.name().unwrap();
+                        } else {
+                            // This is critical. If we consider this parameter the expected one,
+                            // it **must** have a name.
+                            panic!(
+                                "Pattern {:?} equals to expected replacement {:?}, but has no name",
+                                element, param_to_rename
+                            );
+                        }
                     }
                     Some(_) => {}
                     None => {

crates/ide/src/diagnostics/fixes.rs

@@ -104,8 +104,11 @@ impl DiagnosticWithFix for MissingOkInTailExpr {
 
 impl DiagnosticWithFix for IncorrectCase {
     fn fix(&self, sema: &Semantics<RootDatabase>) -> Option<Fix> {
+        let root = sema.db.parse_or_expand(self.file)?;
+        let name_node = self.ident.to_node(&root);
+
         let file_id = self.file.original_file(sema.db);
-        let offset = self.ident.text_range().start();
+        let offset = name_node.syntax().text_range().start();
         let file_position = FilePosition { file_id, offset };
 
         let rename_changes = rename_with_semantics(sema, file_position, &self.suggested_text)?;

crates/syntax/src/ptr.rs

@@ -23,10 +23,6 @@ impl SyntaxNodePtr {
         SyntaxNodePtr { range: node.text_range(), kind: node.kind() }
     }
 
-    pub fn text_range(&self) -> TextRange {
-        self.range.clone()
-    }
-
     pub fn to_node(&self, root: &SyntaxNode) -> SyntaxNode {
         assert!(root.parent().is_none());
         successors(Some(root.clone()), |node| {