From 01445469166865e8f5e1b054a566b1c9cd6fc52e Mon Sep 17 00:00:00 2001
From: Seungmin Jeon <zzz845zz@gmail.com>
Date: Fri, 16 Sep 2022 14:07:16 +0900
Subject: [PATCH] Add comment for operator associativity

---
 src/assignments/assignment04/parser.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/assignments/assignment04/parser.rs b/src/assignments/assignment04/parser.rs
index 599094e..64c9a98 100644
--- a/src/assignments/assignment04/parser.rs
+++ b/src/assignments/assignment04/parser.rs
@@ -14,6 +14,12 @@ mod inner {
 }
 
 /// Parses command.
+///
+/// ## Operator Associativty
+///
+/// For associativity of each operator, please follow [here](https://docs.rs/pest/latest/pest/prec_climber/struct.PrecClimber.html#examples).
+///
+/// e.g. `1+2+3` should be parsed into `(1+2)+3`, not `1+(2+3)` because the associativity of plus("add" in our hw) operator is `Left`.
 pub fn parse_command(line: &str) -> Result<Command> {
     todo!("fill here")
 }