re-export autodiff macro, fix nightly feature

Cargo.toml

@@ -74,7 +74,7 @@ publish = true
 bench = false
 
 
-[features] # 196/300 (104 remaining), 83 visible, 113 hidden
+[features] # 197/300 (103 remaining), 84 visible, 113 hidden
 # ==============================================================================
 # https://doc.rust-lang.org/cargo/reference/features.html
 

DOCS/CHANGELOG.md

@@ -70,7 +70,7 @@ The format is based on [Keep a Changelog], and this project adheres to
   - items from: `core::{cell, num, ops, result}`, `std::{backtrace, fmt}`.
   - fns: `array_from_fn`, `array_from_mut`, `array_from_ref`.
   - macros:
-    - `compile_error`, `option_env`, `enumint`, `assert_unchecked!`, `format!`, `format_args!`, `concat`, `stringify`, `write!`, `writeln!`.
+    - `autodiff`, `compile_error`, `option_env`, `enumint`, `assert_unchecked!`, `format!`, `format_args!`, `concat`, `stringify`, `write!`, `writeln!`.
     - wrapped: `env!`, as `env_!`, `vec!` as `vec_!`.
   - structs:
     - `NonZero`, `Saturating`, `Wrapping`, `OsStr`, `OsString`.

src/code/reexports.rs

@@ -16,6 +16,9 @@ pub use devela_macros::{
 
 /* `core` re-exports */
 
+reexport! { rust: core::autodiff, extra_features: "nightly_autodiff",
+doc: "Automatic Differentiation macro.", autodiff }
+
 // source code
 reexport! { rust: core,
 doc: "Expands to the column number at which it was invoked.", @column as code_column }

src/lib.rs

@@ -25,7 +25,7 @@
 #![cfg_attr(feature = "safe", forbid(unsafe_code))]
 //
 // nightly:
-#![cfg_attr(feature = "nightly_autodiff", feature(auto_diff))]
+#![cfg_attr(feature = "nightly_autodiff", feature(autodiff))]
 #![cfg_attr(feature = "nightly_doc", feature(doc_cfg, doc_notable_trait))]
 #![cfg_attr(all(feature = "nightly_doc", miri), allow(unused_attributes))]
 #![cfg_attr(all(feature = "nightly_doc", not(doc)), allow(unused_attributes))]

src/num/float/wrapper/shared.rs

@@ -994,7 +994,8 @@ macro_rules! custom_impls {
             /// # Formula
             /// $$ f'(x) \approx \frac{f(x + h) - f(x)}{h} $$
             ///
-            /// See also the [`autodiff`] attr macro, enabled with the `nightly_autodiff` feature.
+            /// See also the [`autodiff`][crate::autodiff] attr macro,
+            /// enabled with the `nightly_autodiff` feature.
             ///
             /// [finite difference method]: https://en.wikipedia.org/wiki/Finite_difference_method
             pub fn derivative<F>(f: F, x: $f, h: $f) -> Float<$f>