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/expr_extensions.rs
+++ b/crates/ra_syntax/src/ast/expr_extensions.rs
@@ -1,3 +1,5 @@
+//! Various extension methods to ast Expr Nodes, which are hard to code-generate.
+
 use crate::{
    SyntaxToken, SyntaxElement, SmolStr,
    ast::{self, AstNode, AstChildren, children, child_opt},