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//! This crate provides handy implementations for some design pattern utilities.
//!
//! # Features
//!
//! - `Builder`derive macro for appyling Builder pattern by generating extra Builder struct.
//! - Macro `observer` is for trait's and is for implementing Observer pattern by creating extra `Publisher` struct for the spesified instances whom implement this trait type.
//!
//! # Example
//!
//! ```rust
//! use patternutils::Builder;
//!
//! #[derive(Builder)]
//! #[builder_attr(name = "CommandCreator", opt_in)]
//! struct Command {
//! #[builder_field(name = "value", include = true)]
//! definition: String,
//!
//! #[builder_field(include = true)]
//! arg_count: usize,
//!
//! accepted_flag_fallback: fn(val: usize) -> usize,
//! childs: Vec<Command>,
//! }
//!
//! let mut builder = Command::builder();
//! let command = builder
//! .value(String::from("my-command"))
//! .arg_count(3)
//! .build(|val| {return val + 5;}, vec![]);
//!
//! assert_eq!(command.definition, String::from("my-command"));
//! assert_eq!(command.arg_count, 3);
//! assert_eq!((command.accepted_flag_fallback)(67), 72);
//! assert_eq!(command.childs.len(), 0);
//! ```
pub use Builder;
pub use observer;