Made a fix for #80

.devcontainer/devcontainer.json

@@ -1,7 +1,8 @@
 {
     "extensions": [
         "rust-lang.rust",
-        "webfreak.debug"
+        "webfreak.debug",
+        "matklad.rust-analyzer"
     ],
     "workspaceFolder": "strum",
     "postCreateCommand": "curl --proto '=https' --tlsv1.2 -sSf -o ~/rustup.sh https://sh.rustup.rs && /bin/bash ~/rustup.sh -y",

strum/src/lib.rs

@@ -106,23 +106,23 @@ impl std::error::Error for ParseError {
 ///         Yellow,
 /// }
 ///
-/// // Iterating over any enum requires 2 type parameters
-/// // A 3rd is used in this example to allow passing a predicate
-/// fn generic_iterator<E, I, F>(pred: F)
-///                      where E: IntoEnumIterator<Iterator=I>,
-///                            I: Iterator<Item=E>,
-///                            F: Fn(E) {
+/// // Iterate over the items in an enum and perform some function on them.
+/// fn generic_iterator<E, F>(pred: F)
+/// where
+///     E: IntoEnumIterator,
+///     F: Fn(E),
+/// {
 ///     for e in E::iter() {
 ///         pred(e)
 ///     }
 /// }
 ///
 /// fn main() {
-///     generic_iterator::<Color,_, _>(|color| println!("{:?}", color));
+///     generic_iterator::<Color, _>(|color| println!("{:?}", color));
 /// }
 /// ```
-pub trait IntoEnumIterator {
-    type Iterator;
+pub trait IntoEnumIterator: Sized {
+    type Iterator: Iterator<Item = Self>;
 
     fn iter() -> Self::Iterator;
 }

strum_tests/tests/enum_iter.rs

@@ -174,4 +174,4 @@ fn take_nth_test() {
     assert_eq!(None, iter.nth(1));
     assert_eq!(None, iter.next());
     assert_eq!(None, iter.next_back());
-}
+}

strum_tests/tests/enum_variant_names.rs

@@ -47,7 +47,10 @@ fn plain_kebab() {
         RebeccaPurple,
     }
 
-    assert_eq!(Color::VARIANTS, &["red", "blue", "yellow", "rebecca-purple"]);
+    assert_eq!(
+        Color::VARIANTS,
+        &["red", "blue", "yellow", "rebecca-purple"]
+    );
 }
 
 #[test]