Specify literal tokens

1 files changed, 7 insertions, 1 deletions

diff --git a/xtask/src/codegen/rust.ungram b/xtask/src/codegen/rust.ungram
index 8edabc3b9..bc1dd6761 100644
--- a/xtask/src/codegen/rust.ungram
+++ b/xtask/src/codegen/rust.ungram
@@ -239,7 +239,13 @@ Expr =
 | WhileExpr
 
 Literal =
-  Attr* 'int_number'
+  Attr* value:(
+    'int_number' | 'float_number'
+  | 'string' | 'raw_string'
+  | 'byte_string' | 'raw_byte_string'
+  | 'true' | 'false'
+  | 'char' | 'byte'
+  )
 
 PathExpr =
   Attr* Path