Struct MapVisitor 

pub struct MapVisitor<'a, 'b> { /* private fields */ }

A visitor for decoding map key-value pairs of different types.

Returned from Decoder::map_visitor.

Implementations

impl<'b> MapVisitor<'_, 'b>

pub fn visit<K: Decode<'b>, V: Decode<'b>>( &mut self, ) -> Option<Result<(K, V), Error<K::Error, V::Error>>>

Visit the next key-value pair in the map.

pub fn with_key<K, F, O>(&mut self, f: F) -> Option<Result<O, K::Error>>

where K: Decode<'b>, F: FnOnce(K, &mut Decoder<'b>) -> O,

Visit the next key in the map, applying the given function to decode the value.

pub fn remaining(&self) -> Option<usize>

pub fn definite(&self) -> bool

Trait Implementations

impl<'a, 'b> Debug for MapVisitor<'a, 'b>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'a, 'b> Hash for MapVisitor<'a, 'b>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<'a, 'b> PartialEq for MapVisitor<'a, 'b>

fn eq(&self, other: &MapVisitor<'a, 'b>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'a, 'b> Eq for MapVisitor<'a, 'b>

impl<'a, 'b> StructuralPartialEq for MapVisitor<'a, 'b>