docs: em! size hint necessity

Pscheidl · Pscheidl · commit 1f157ba9fe9a · 2024-05-26T09:30:38.000+02:00
diff --git a/README.md b/README.md
@@ -32,6 +32,7 @@ pub enum Letter {
 }
 
 // Indexing and mutation
+// The SIZE hint is required until [generic_const_expr](https://github.com/rust-lang/rust/issues/76560) are stabilized.
 let mut enum_map = EnumMap::<Letter, i32, { Letter::SIZE }>::new_default();
 assert_eq!(0, enum_map[Letter::A]);
 enum_map[Letter::A] = 42;

Original file line number	Diff line number	Diff line change
`@@ -32,6 +32,7 @@ pub enum Letter {`
`32`	`32`	`}`
`33`	`33`
`34`	`34`	`// Indexing and mutation`
	`35`	`+// The SIZE hint is required until [generic_const_expr](https://github.com/rust-lang/rust/issues/76560) are stabilized.`
`35`	`36`	`let mut enum_map = EnumMap::<Letter, i32, { Letter::SIZE }>::new_default();`
`36`	`37`	`assert_eq!(0, enum_map[Letter::A]);`
`37`	`38`	`enum_map[Letter::A] = 42;`