Visitor

A generic library to easily visit elements of a structure and perform an action on each one

Usage

Add this to your Cargo.toml:

toml [dependencies] visitor = "*"

and this to your crate root:

rust extern crate visitor;

Example

```rust struct Data{ a: u32, b: u32 } impl Visit for Data{ fn visit>(&self, v: &mut V) -> Result<(),V::Error>{ try!(v.visit(self.a)); try!(v.visit(self.b)); Ok(()) } }

struct AddVisitor{ value: u32 } impl Visitor for AddVisitor{ type Error = (); fn visit(&mut self, data: u32) -> Result<(), Self::Error>{ self.value += data; Ok(()) } }

[test]

fn it_works() { let data = Data{ a: 3, b: 4 }; let mut adder = AddVisitor{ value: 0 };

data.visit(&mut adder).unwrap();

assert_eq!(adder.value, 7);

} ```