std-macro-extensions vs clonelicious vs future-fn

A collection of macro extensions for Rust's standard library data structures, simplifying the creation and manipulation of common collections such as HashMap, Vec, and more.

A Rust macro library that simplifies cloning and closure execution. The `clone!` macro automatically clones variables and immediately executes the closure with the cloned values, streamlining common patterns in Rust programming.

A Rust library providing macros to simplify the creation of asynchronous closures with external state captured by move. Useful for structuring asynchronous code with ease and clarity.