Turn off feature(const_fn_trait_bound) on docs.rs

This should fix the build errors there

Author: Techcable

Cargo.toml

@@ -21,6 +21,9 @@ never = []
 # Support the 'builtin' alternative to stdlib types
 builtins = []
 
-
 [workspace]
 members = ["lib/*"]
+
+# Workaround for outdated nightly
+[package.metadata.docs.rs]
+rustc-args = ["--cfg", "docs_rs"]

src/lib.rs

@@ -13,12 +13,18 @@
 #![feature(
     const_fn, // We rely on const eval :(
     const_panic, const_option, // We use Option::unwrap
-    const_fn_trait_bound, // This is required on recent nightly
     const_fn_fn_ptr_basics, // We use PhantomData<fn() -> T>
     // Used for field_offset macro
     const_raw_ptr_deref,
     const_raw_ptr_to_usize_cast,
 )]
+/*
+ * This is required on recent nightly
+ *
+ * However it breaks on the version that docs.rs is using (as of this writing).
+ * Therefore, we have to turn it off there.
+ */
+#![cfg_attr(not(docs_rs), feature(const_fn_trait_bound))]
 #![cfg_attr(feature = "never", feature(never_type))]
 
 mod macros;
@@ -71,4 +77,4 @@ pub unsafe trait FieldReflect: StaticReflect {
     /// Static information on this structure's fields,
     /// where each field's information is given by name
     const NAMED_FIELD_INFO: Self::NamedFieldInfo;
-}
+}