Trait GetFieldMut

pub trait GetFieldMut
where
    Self: Sized,
{
    // Required methods
    fn get_field_mut<T>(&mut self, fr: FieldRef<Self, T>) -> &mut T;
    fn try_get_field_mut<'x, FR, T>(&'x mut self, fr: FR) -> Option<&'x mut T>
       where FR: OptionFieldRef<'x, Input = Self, Output = T>;
}

A trait to obtain a mutable value to which FieldRef references via description like obj.get_field_mut(field_ref).

Required Methods

fn get_field_mut<T>(&mut self, fr: FieldRef<Self, T>) -> &mut T

Examples

use field_ref::{GetFieldMut, field_ref_of};

struct Foo(u32, u32, f64);

let fr = field_ref_of!(Foo => 1);
let mut foo = Foo(10, 20, 0.5);
*foo.get_field_mut(fr) = 30;
assert_eq!(foo.1, 30);

fn try_get_field_mut<'x, FR, T>(&'x mut self, fr: FR) -> Option<&'x mut T>

where FR: OptionFieldRef<'x, Input = Self, Output = T>,

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<S: Sized> GetFieldMut for S