Reexport current_thread_index function

Author: GuillaumeGomez

src/lib.rs

@@ -109,7 +109,7 @@ mod par_either;
 
 mod compile_fail;
 
-pub use rayon_core::current_num_threads;
+pub use rayon_core::{current_num_threads, current_thread_index};
 pub use rayon_core::FnContext;
 pub use rayon_core::ThreadPool;
 pub use rayon_core::ThreadPoolBuildError;