Trait Setter 

pub trait Setter<S, A>: HasSetter<S, A> { }

A Setter is an optic that can change its focused value, providing only a write operation

It provides:

• set to set the focused value inside a larger type

This is useful when providing a way to save a particular part of a larger type without giving any access to its contents.

Type Arguments

• S: The data type the optic operates on
• A: The data type the optic focuses on

Note

This is a marker trait that is blanket implemented for all structs that satisfy the requirements.

See Also

• [Prism] — an optic that focuses on a potentially missing value in a product type (ex. optional struct field) or a sum type vairant
• [Lens] — an optic that focuses on an always-present value in a product type (e.g., a required struct field)
• [FallibleIso] — a variant of Iso where the mapping might fail, returning an error
• [Iso] — an isomorphism optic representing a reversible bijective conversion between two types

Implementors

impl<S, A, SETTER: HasSetter<S, A>> Setter<S, A> for SETTER