[wgsl] Fix definition of const_expr (gpuweb#818)

This CL updates the const_expr to use the proper * instead of ?. Fixes gpuweb#800
haoxli · Jun 1, 2020 · 2b6305a · 2b6305a
1 parent 01b20b4
commit 2b6305a
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/wgsl/index.bs b/wgsl/index.bs
@@ -1392,7 +1392,7 @@ const_literal
   | FALSE
 
 const_expr
-  : type_decl PAREN_LEFT (const_expr COMMA)? const_expr PAREN_RIGHT
+  : type_decl PAREN_LEFT (const_expr COMMA)* const_expr PAREN_RIGHT
   | const_literal
 </pre>