Merge #4269 #4293

4269: add support of use alias semantic in definition r=matklad a=bnjjj

close #4202 

4293: no doctests for flycheck r=matklad a=matklad



bors r+
🤖

Co-authored-by: Benjamin Coenen <5719034+bnjjj@users.noreply.github.com>
Co-authored-by: Aleksey Kladov <aleksey.kladov@gmail.com>

Author: 3 people

crates/ra_flycheck/Cargo.toml

@@ -4,6 +4,9 @@ name = "ra_flycheck"
 version = "0.1.0"
 authors = ["rust-analyzer developers"]
 
+[lib]
+doctest = false
+
 [dependencies]
 crossbeam-channel = "0.4.0"
 lsp-types = { version = "0.74.0", features = ["proposed"] }

crates/ra_ide/src/goto_definition.rs

@@ -243,6 +243,39 @@ mod tests {
         );
     }
 
+    #[test]
+    fn goto_def_for_use_alias() {
+        covers!(ra_ide_db::goto_def_for_use_alias);
+        check_goto(
+            "
+            //- /lib.rs
+            use foo as bar<|>;
+
+
+            //- /foo/lib.rs
+            #[macro_export]
+            macro_rules! foo { () => { () } }",
+            "SOURCE_FILE FileId(2) 0..50",
+            "#[macro_export]\nmacro_rules! foo { () => { () } }\n",
+        );
+    }
+
+    #[test]
+    fn goto_def_for_use_alias_foo_macro() {
+        check_goto(
+            "
+            //- /lib.rs
+            use foo::foo as bar<|>;
+
+            //- /foo/lib.rs
+            #[macro_export]
+            macro_rules! foo { () => { () } }
+            ",
+            "foo MACRO_CALL FileId(2) 0..49 29..32",
+            "#[macro_export]\nmacro_rules! foo { () => { () } }|foo",
+        );
+    }
+
     #[test]
     fn goto_def_for_macros_in_use_tree() {
         check_goto(

crates/ra_ide_db/src/defs.rs

@@ -119,6 +119,16 @@ fn classify_name_inner(sema: &Semantics<RootDatabase>, name: &ast::Name) -> Opti
 
     match_ast! {
         match parent {
+            ast::Alias(it) => {
+                tested_by!(goto_def_for_use_alias; force);
+                let use_tree = it.syntax().ancestors().find_map(ast::UseTree::cast)?;
+                let path = use_tree.path()?;
+                let path_segment = path.segment()?;
+                let name_ref = path_segment.name_ref()?;
+                let name_ref_class = classify_name_ref(sema, &name_ref)?;
+
+                Some(name_ref_class.definition())
+            },
             ast::BindPat(it) => {
                 let local = sema.to_def(&it)?;
                 Some(Definition::Local(local))

crates/ra_ide_db/src/marks.rs

@@ -2,6 +2,7 @@
 
 test_utils::marks![
     goto_def_for_macros
+    goto_def_for_use_alias
     goto_def_for_methods
     goto_def_for_fields
     goto_def_for_record_fields