From c3cc92e352a2a05051a175307df4d67b8a40067d Mon Sep 17 00:00:00 2001
From: Tony Arcieri <bascule@gmail.com>
Date: Sat, 6 Sep 2025 12:51:32 -0600
Subject: [PATCH] mcf: add `(Try)From` impls for `McfHashRef` and `&str`

Adds impls for converting both `McfHash` and `McfHashRef` to/from `&str`
---
 mcf/src/lib.rs | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/mcf/src/lib.rs b/mcf/src/lib.rs
index c2ac6f204..c07d793ea 100644
--- a/mcf/src/lib.rs
+++ b/mcf/src/lib.rs
@@ -69,6 +69,27 @@ impl<'a> McfHashRef<'a> {
     }
 }
 
+impl<'a> From<McfHashRef<'a>> for &'a str {
+    fn from(hash: McfHashRef<'a>) -> &'a str {
+        hash.0
+    }
+}
+
+#[cfg(feature = "alloc")]
+impl From<McfHashRef<'_>> for alloc::string::String {
+    fn from(hash: McfHashRef<'_>) -> Self {
+        hash.0.into()
+    }
+}
+
+impl<'a> TryFrom<&'a str> for McfHashRef<'a> {
+    type Error = Error;
+
+    fn try_from(s: &'a str) -> Result<Self> {
+        Self::new(s)
+    }
+}
+
 #[cfg(feature = "alloc")]
 mod allocating {
     use crate::{Base64, Error, Field, Fields, McfHashRef, Result, fields, validate, validate_id};
@@ -177,6 +198,14 @@ mod allocating {
         }
     }
 
+    impl TryFrom<&str> for McfHash {
+        type Error = Error;
+
+        fn try_from(s: &str) -> Result<Self> {
+            Self::new(s)
+        }
+    }
+
     impl fmt::Display for McfHash {
         fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
             f.write_str(self.as_str())