Merge #9939

9939: feat: Adding extract_module assist r=Veykril a=feniljain

Should solve https://github.com/rust-analyzer/rust-analyzer/issues/9591

Co-authored-by: vi_mi <fenil.jain2018@vitstudent.ac.in>
Co-authored-by: Laurențiu Nicola <lnicola@dend.ro>

crates/syntax/src/ast/make.rs

@@ -196,6 +196,12 @@ pub fn path_from_segments(
         format!("use {};", segments)
     })
 }
+
+pub fn join_paths(paths: impl IntoIterator<Item = ast::Path>) -> ast::Path {
+    let paths = paths.into_iter().map(|it| it.syntax().clone()).join("::");
+    ast_from_text(&format!("use {};", paths))
+}
+
 // FIXME: should not be pub
 pub fn path_from_text(text: &str) -> ast::Path {
     ast_from_text(&format!("fn main() {{ let test = {}; }}", text))