Module optics::prelude

Prelude, aimed for blanket import.

Lenses for tuples are only defined for each tuple with arity n <= 4. Normally, tuples with more fields are discouraged for practical use. That said, one can always declare his own ones with the macro declare_lens_from_field.

Structs

• _0
  Lens for field 0 in tuples.
• _1
  Lens for field 1 in tuples.
• _2
  Lens for field 2 in tuples.
• _3
  Lens for field 3 in tuples.
• _Err
  Prism for Result::Err.
• _Ok
  Prism for Result::Ok.
• _Some
  Prism for Option::Some.