Struct serde_keyvalue::key_values::EmptyMapAccess

struct EmptyMapAccess;

MapAccess for a map with no members specified.

This is used to allow a struct enum type to be specified without [ and ], in which case all its members will take their default value:

#[derive(Deserialize, PartialEq, Eq, Debug)]
#[serde(rename_all = "kebab-case")]
enum FlipMode {
    Active {
        #[serde(default)]
        switch1: bool,
        #[serde(default)]
        switch2: bool,
    },
}
#[derive(Deserialize, PartialEq, Eq, Debug)]
struct TestStruct {
    mode: FlipMode,
}
let res: TestStruct = from_key_values("mode=active").unwrap();
assert_eq!(
    res,
    TestStruct {
        mode: FlipMode::Active {
            switch1: false,
            switch2: false
        }
    }
 );

Trait Implementations

impl<'de> MapAccess<'de> for EmptyMapAccess

type Error = ParseError

The error type that can be returned if some error occurs during deserialization.

fn next_key_seed<K>(&mut self, _seed: K) -> Result<Option<K::Value>, ParseError>

where K: DeserializeSeed<'de>,

This returns Ok(Some(key)) for the next key in the map, or Ok(None) if there are no more remaining entries.

fn next_value_seed<V>(&mut self, _seed: V) -> Result<V::Value, ParseError>

where V: DeserializeSeed<'de>,

This returns a Ok(value) for the next value in the map.

fn next_entry_seed<K, V>( &mut self, kseed: K, vseed: V ) -> Result<Option<(<K as DeserializeSeed<'de>>::Value, <V as DeserializeSeed<'de>>::Value)>, Self::Error>

where K: DeserializeSeed<'de>, V: DeserializeSeed<'de>,

This returns Ok(Some((key, value))) for the next (key-value) pair in the map, or Ok(None) if there are no more remaining items.

fn next_key<K>(&mut self) -> Result<Option<K>, Self::Error>

where K: Deserialize<'de>,

This returns Ok(Some(key)) for the next key in the map, or Ok(None) if there are no more remaining entries.

fn next_value<V>(&mut self) -> Result<V, Self::Error>

where V: Deserialize<'de>,

This returns a Ok(value) for the next value in the map.

fn next_entry<K, V>(&mut self) -> Result<Option<(K, V)>, Self::Error>

where K: Deserialize<'de>, V: Deserialize<'de>,

This returns Ok(Some((key, value))) for the next (key-value) pair in the map, or Ok(None) if there are no more remaining items.

fn size_hint(&self) -> Option<usize>

Returns the number of entries remaining in the map, if known.