add minimal comments

2019-04-02 13:02:23 +03:00
parent 0e1e40676a
commit ab19ff16e5
5 changed files with 13 additions and 0 deletions
--- a/crates/ra_syntax/src/ast/extensions.rs
+++ b/crates/ra_syntax/src/ast/extensions.rs
@@ -1,3 +1,6 @@
+//! Various extension methods to ast Nodes, which are hard to code-generate.
+//! Extensions for various expressions live in a sibling `expr_extensions` module.
+
 use itertools::Itertools;

 use crate::{