From d045ac568eb41c1bd0b3d24ccfce09ac7be57910 Mon Sep 17 00:00:00 2001
From: lilymonade <lily.blanleuil@etik.com>
Date: Tue, 11 Mar 2025 18:03:50 +0100
Subject: [PATCH] result exercises

---
 subject_source/src/errors.rs        |  1 +
 subject_source/src/errors/result.rs | 20 +++++++++++++++++++-
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/subject_source/src/errors.rs b/subject_source/src/errors.rs
index ba0e383..8c45a69 100644
--- a/subject_source/src/errors.rs
+++ b/subject_source/src/errors.rs
@@ -1 +1,2 @@
 pub mod option;
+pub mod result;
diff --git a/subject_source/src/errors/result.rs b/subject_source/src/errors/result.rs
index d1d05b0..aeb89ff 100644
--- a/subject_source/src/errors/result.rs
+++ b/subject_source/src/errors/result.rs
@@ -1,3 +1,4 @@
+/// Returns `true` if the result contains an `Err`
 pub fn is_err(res: &Result<i32, &str>) -> bool {
     match res {
         Err(_) => true,
@@ -5,10 +6,12 @@ pub fn is_err(res: &Result<i32, &str>) -> bool {
     }
 }
 
+/// Returns `true` if the result contains a `Ok`
 pub fn is_ok(res: &Result<i32, &str>) -> bool {
     !is_err(res)
 }
 
+/// Returns the wrapped `&str` if any, panic otherwise
 pub fn get_err_or_panic(res: Result<i32, &str>) -> &str {
     match res {
         Err(e) => e,
@@ -16,4 +19,19 @@ pub fn get_err_or_panic(res: Result<i32, &str>) -> &str {
     }
 }
 
-pub fn 
+/// Returns the wrapped `i32` if any, panic otherwise
+pub fn get_val_or_panic(res: Result<i32, &str>) -> i32 {
+    match res {
+        Ok(v) => v,
+        Err(_) => panic!("result was an error"),
+    }
+}
+
+/// Transforms `Ok` to `Some` and `Err` to `None`
+/// effectively discarding the `Err` wrapped value
+pub fn discard_err(res: Result<i32, &str>) -> Option<i32> {
+    match res {
+        Ok(v) => Some(v),
+        Err(_) => None,
+    }
+}