impl Error for CastFailure

BrainiumLLC · Apr 8, 2021 · 43b4488 · 43b4488
1 parent 6cabb77
commit 43b4488
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Showing 3 changed files with 17 additions and 4 deletions.
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Unreleased
 
+# 0.1.3 (2021-04-08)
+
+- Implement `std::error::Error` for `CastFailure`.
+
 # 0.1.2 (2021-04-08)
 
 - Added `try_cast` function for those who wish to live less dangerously.

diff --git a/Cargo.toml b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "en"
-version = "0.1.2"
+version = "0.1.3"
 authors = ["Brainium Studios LLC"]
 edition = "2018"
 description = "The easiest numeric traits!"

diff --git a/src/cast.rs b/src/cast.rs
@@ -1,11 +1,18 @@
-use std::fmt::{Debug, Display};
+use std::fmt::Debug;
 
-#[derive(Debug)]
 pub struct CastFailure<T, U: Debug> {
     value: U,
     _marker: std::marker::PhantomData<T>,
 }
 
+impl<T, U: Debug> Debug for CastFailure<T, U> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("CastFailure")
+            .field("value", &self.value)
+            .finish()
+    }
+}
+
 impl<T, U: Debug> From<U> for CastFailure<T, U> {
     fn from(value: U) -> Self {
         Self {
@@ -15,7 +22,7 @@ impl<T, U: Debug> From<U> for CastFailure<T, U> {
     }
 }
 
-impl<T, U: Debug> Display for CastFailure<T, U> {
+impl<T, U: Debug> std::fmt::Display for CastFailure<T, U> {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         write!(
             f,
@@ -27,6 +34,8 @@ impl<T, U: Debug> Display for CastFailure<T, U> {
     }
 }
 
+impl<T, U: Debug> std::error::Error for CastFailure<T, U> {}
+
 impl<T, U: Debug> CastFailure<T, U> {
     #[cold]
     fn panic(self) -> ! {