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//! Value Structs derive macros for Rust to support the newtype pattern //! //! A very simple derive macros to support strong type system and //! the new type pattern (https://doc.rust-lang.org/1.0.0/style/features/types/newtype.html). //! //! For example: //! ``` //! use rvstruct::ValueStruct; //! //! #[derive(ValueStruct)] //! struct UserId(String); //! //! let uid : UserId = "my-uid".into(); //! ``` //! //! `ValueStruct` generates for you: //! - `std::convert::From<>` instances automatically to help you to create your structs. //! - `ValueStruct::value()` function to access your field directly without using .0. //! //! There are different behaviour for different field types: //! - for `std::string::String` it generates additional instance for `From<&str>` //! use rvs_derive; pub use rvs_derive::*; pub trait ValueStruct { type ValueType; fn value(&self) -> &Self::ValueType; }