Merge #10252

10252: fix: make `goto_definition` multi-token mapping aware r=Veykril a=XFFXFF

Implement #10070 in  [`goto_definition`](https://github.com/rust-analyzer/rust-analyzer/blob/master/crates/ide/src/goto_definition.rs)

Co-authored-by: zhoufan <[email protected]>

Author: bors[bot]

crates/ide/src/goto_definition.rs

@@ -39,9 +39,8 @@ pub(crate) fn goto_definition(
             kind if kind.is_trivia() => 0,
             _ => 1,
         })?;
-    let token = sema.descend_into_macros(original_token.clone());
-    let parent = token.parent()?;
-    if let Some(_) = ast::Comment::cast(token.clone()) {
+    if let Some(_) = ast::Comment::cast(original_token.clone()) {
+        let parent = original_token.parent()?;
         let (attributes, def) = doc_attributes(&sema, &parent)?;
         let (docs, doc_mapping) = attributes.docs_with_rangemap(db)?;
         let (_, link, ns) =
@@ -54,33 +53,41 @@ pub(crate) fn goto_definition(
         return Some(RangeInfo::new(original_token.text_range(), vec![nav]));
     }
 
-    let navs = match_ast! {
-        match parent {
-            ast::NameRef(name_ref) => {
-                reference_definition(&sema, Either::Right(&name_ref))
-            },
-            ast::Name(name) => {
-                match NameClass::classify(&sema, &name)? {
-                    NameClass::Definition(def) | NameClass::ConstReference(def) => {
-                        try_find_trait_item_definition(sema.db, &def).unwrap_or_else(|| def_to_nav(sema.db, def))
-                    }
-                    NameClass::PatFieldShorthand { local_def, field_ref } => {
-                        local_and_field_to_nav(sema.db, local_def, field_ref)
+    let navs = sema.descend_into_macros_many(original_token.clone())
+        .into_iter()
+        .filter_map(|token| {
+            let parent = token.parent()?;
+            let navs = match_ast! {
+                match parent {
+                    ast::NameRef(name_ref) => {
+                        reference_definition(&sema, Either::Right(&name_ref))
                     },
-                }
-            },
-            ast::Lifetime(lt) => if let Some(name_class) = NameClass::classify_lifetime(&sema, &lt) {
-                match name_class {
-                    NameClass::Definition(def) => def_to_nav(sema.db, def),
+                    ast::Name(name) => {
+                        match NameClass::classify(&sema, &name)? {
+                            NameClass::Definition(def) | NameClass::ConstReference(def) => {
+                                try_find_trait_item_definition(sema.db, &def).unwrap_or_else(|| def_to_nav(sema.db, def))
+                            }
+                            NameClass::PatFieldShorthand { local_def, field_ref } => {
+                                local_and_field_to_nav(sema.db, local_def, field_ref)
+                            },
+                        }
+                    },
+                    ast::Lifetime(lt) => if let Some(name_class) = NameClass::classify_lifetime(&sema, &lt) {
+                        match name_class {
+                            NameClass::Definition(def) => def_to_nav(sema.db, def),
+                            _ => return None,
+                        }
+                    } else {
+                        reference_definition(&sema, Either::Left(&lt))
+                    },
+                    ast::TokenTree(tt) => try_lookup_include_path_or_derive(&sema, tt, token, position.file_id)?,
                     _ => return None,
                 }
-            } else {
-                reference_definition(&sema, Either::Left(&lt))
-            },
-            ast::TokenTree(tt) => try_lookup_include_path_or_derive(&sema, tt, token, position.file_id)?,
-            _ => return None,
-        }
-    };
+            };
+            Some(navs)
+        })
+        .flatten()
+        .collect::<Vec<NavigationTarget>>();
 
     Some(RangeInfo::new(original_token.text_range(), navs))
 }