Trait photonix::focus::composites::SetFourth

pub trait SetFourth<LevelOne, LevelTwo, LevelThree, LevelFour> where
    LevelThree: Set<LevelFour>,
    LevelTwo: Modify<LevelThree>,
    LevelOne: Modify<LevelTwo>,
    Self: Modify<LevelOne> + Sized, {
    fn set_fourth(self, new_value: LevelFour) -> Self { ... }
}

A variant of Set, reaching four levels deep in the data structure.

Examples

  #[derive(Get, Modify)]
  pub struct Employee { pub name: String, pub company: Company }

  #[derive(Get, Modify)]
  pub struct Company { pub name: String, pub address: Address }

  #[derive(Get, Modify)]
  pub struct Address { pub city: String, pub street: Street }

  #[derive(Get, Set)]
  pub struct Street { pub number: u16, pub name: String }

 let john_doe = Employee {
     name: String::from("John Doe"),
     company: Company {
         name: String::from("Acme Corporation"),
         address: Address {
                 city: String::from("London"),
                 street: Street {
                     number: 23,
                     name: String::from("High street"),
                 }
             },
         }
     };

 //            Level 1   Level 2   Level 3 Level 4     Parent type
 //               |         |        |       |           |
 impl SetFourth<Company, Address, Street, String> for Employee {}
 impl GetFourth<Company, Address, Street, String> for Employee {}

 let john_at_new_street = john_doe.set_fourth(String::from("Low street"));

 assert_eq!("Low street", john_at_new_street.get_fourth().as_str());

Provided methods

fn set_fourth(self, new_value: LevelFour) -> Self

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Implementations on Foreign Types

impl<LevelOne, LevelTwo, LevelThree, LevelFour> SetFourth<LevelOne, LevelTwo, LevelThree, LevelFour> for Option<LevelOne> where
    LevelOne: Modify<LevelTwo>,
    LevelTwo: Modify<LevelThree>,
    LevelThree: Set<LevelFour>, 

fn set_fourth(self, new_value: LevelFour) -> Self

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Implementors

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