src/parser.rs

@@ -1,3 +1,5 @@
+use std::fmt::Display;
+
 use crate::{
     ast::Expr,
     token::{LiteralType, Token, TokenType},
@@ -24,14 +26,7 @@ impl Parser<'_> {
     }
 
     fn expression(&mut self) -> Result<Expr, ParseError> {
-        self.comma()
-    }
-
-    // Challenge #1. We're writing comma before equality, because it has the lowest precedence
-    // comma -> equality ((,) equality)* ;   // expression grammar
-    fn comma(&mut self) -> Result<Expr, ParseError> {
-        use TokenType::*;
-        self.left_association_binary(&[Comma], Parser::equality)
+        self.equality()
     }
 
     fn equality(&mut self) -> Result<Expr, ParseError> {