1 files changed, 15 insertions, 1 deletions

diff --git a/crates/ra_syntax/src/ast/make.rs b/crates/ra_syntax/src/ast/make.rs
index 04a5408fe..9781b748f 100644
--- a/crates/ra_syntax/src/ast/make.rs
+++ b/crates/ra_syntax/src/ast/make.rs
@@ -2,7 +2,7 @@
 //! of smaller pieces.
 use itertools::Itertools;
 
-use crate::{ast, AstNode, SourceFile};
+use crate::{algo, ast, AstNode, SourceFile};
 
 pub fn name(text: &str) -> ast::Name {
     ast_from_text(&format!("mod {};", text))
@@ -21,6 +21,20 @@ pub fn path_qualified(qual: ast::Path, name_ref: ast::NameRef) -> ast::Path {
 fn path_from_text(text: &str) -> ast::Path {
     ast_from_text(text)
 }
+pub fn path_with_type_arg_list(path: ast::Path, args: Option<ast::TypeArgList>) -> ast::Path {
+    if let Some(args) = args {
+        let syntax = path.syntax();
+        // FIXME: remove existing type args
+        let new_syntax = algo::insert_children(
+            syntax,
+            crate::algo::InsertPosition::Last,
+            &mut Some(args).into_iter().map(|n| n.syntax().clone().into()),
+        );
+        ast::Path::cast(new_syntax).unwrap()
+    } else {
+        path
+    }
+}
 
 pub fn record_field(name: ast::NameRef, expr: Option<ast::Expr>) -> ast::RecordField {
     return match expr {