From d279e7e1914348bf266afc38d9275ed5976c614a Mon Sep 17 00:00:00 2001
From: Justin Kelz <justinkelz@gmail.com>
Date: Sun, 3 Apr 2022 17:58:38 -0700
Subject: [PATCH] It's OK to return Result<(),E> in main

---
 exercises/error_handling/errors3.rs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/exercises/error_handling/errors3.rs b/exercises/error_handling/errors3.rs
index 460ac5c4..a4fa8741 100644
--- a/exercises/error_handling/errors3.rs
+++ b/exercises/error_handling/errors3.rs
@@ -8,11 +8,11 @@
 
 use std::num::ParseIntError;
 
-fn main() {
+fn main() -> Result<(),ParseIntError> { // This isn't too bad, main should return (), so we just float the result structure up to main.
     let mut tokens = 100;
     let pretend_user_input = "8";
 
-    let cost = total_cost(pretend_user_input)?;
+    let cost = total_cost(pretend_user_input)?; // Here we're making cost a result
 
     if cost > tokens {
         println!("You can't afford that many!");
@@ -20,6 +20,8 @@ fn main() {
         tokens -= cost;
         println!("You now have {} tokens.", tokens);
     }
+    Ok(()) // :facepalm: So, I was on https://doc.rust-lang.org/book/ch09-02-recoverable-errors-with-result.html at the final example.
+            // Wish I had read further
 }
 
 pub fn total_cost(item_quantity: &str) -> Result<i32, ParseIntError> {