Trait visit_diff::StructDiffer

pub trait StructDiffer {
    type Ok;
    type Err;
    fn diff_field<T: ?Sized>(&mut self, name: &'static str, a: &T, b: &T)
    where
        T: Diff;
    fn end(self) -> Result<Self::Ok, Self::Err>;

    fn skip_field<T: ?Sized>(&mut self, _name: &'static str) { ... }
}

A type that can deal with differences in a struct.

Associated Types

type Ok

Type returned on success.

type Err

Type returned on failure.

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Required methods

fn diff_field<T: ?Sized>(&mut self, name: &'static str, a: &T, b: &T) where
    T: Diff, 

Visits a field name with values a and b in the respective structures.

fn end(self) -> Result<Self::Ok, Self::Err>

Completes traversal of the struct.

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Provided methods

fn skip_field<T: ?Sized>(&mut self, _name: &'static str)

Skips a field that is excluded from differencing.

Some differs may e.g. print a placeholder for skipped fields.

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Implementations on Foreign Types

impl StructDiffer for ()

type Ok = ()

type Err = Void

fn diff_field<T: ?Sized>(&mut self, _: &'static str, _: &T, _: &T) where
    T: Diff, 

fn end(self) -> Result<Self::Ok, Self::Err>

fn skip_field<T: ?Sized>(&mut self, _name: &'static str)

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Implementors

impl<R> StructDiffer for Const<R>

type Ok = R

type Err = Void

fn diff_field<T: ?Sized>(&mut self, _: &'static str, _: &T, _: &T) where
    T: Diff, 

fn end(self) -> Result<Self::Ok, Self::Err>

fn skip_field<T: ?Sized>(&mut self, _name: &'static str)

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