Auto-document feature guarded items (#634)

Co-authored-by: Paul Mason <[email protected]>

Author: robjtede

Cargo.toml

@@ -16,6 +16,7 @@ version = "1.33.1"
 
 [package.metadata.docs.rs]
 all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
 
 [dependencies]
 arbitrary = { default-features = false, optional = true, version = "1.0" }

src/lib.rs

@@ -2,6 +2,7 @@
 #![forbid(unsafe_code)]
 #![deny(clippy::print_stdout, clippy::print_stderr)]
 #![cfg_attr(not(feature = "std"), no_std)]
+#![cfg_attr(docsrs, feature(doc_auto_cfg))]
 extern crate alloc;
 
 mod constants;