Trait Emit 

pub trait Emit {
    // Required method
    fn emit_key_and_value<K, Value>(
        &self,
        key: K,
        value: Value,
    ) -> Result<Mappings<K, Value>, Error>;

    // Provided methods
    fn emit(&self) -> Result<Mappings<(), ()>, Error> { ... }
    fn emit_if(&self, condition: bool) -> Result<Mappings<(), ()>, Error> { ... }
    fn emit_key<K>(&self, key: K) -> Result<Mappings<K, ()>, Error> { ... }
    fn emit_value<Value>(
        &self,
        value: Value,
    ) -> Result<Mappings<(), Value>, Error> { ... }
}

View mapping emit functions. Used when implementing a view’s map() function.

Required Methods

fn emit_key_and_value<K, Value>( &self, key: K, value: Value, ) -> Result<Mappings<K, Value>, Error>

Creates a Map result with a key and value.

Provided Methods

fn emit(&self) -> Result<Mappings<(), ()>, Error>

Creates a Map result with an empty key and value.

fn emit_if(&self, condition: bool) -> Result<Mappings<(), ()>, Error>

Creates a Map result with an empty key and value if condition is true.

fn emit_key<K>(&self, key: K) -> Result<Mappings<K, ()>, Error>

Creates a Map result with a key and an empty value.

fn emit_value<Value>(&self, value: Value) -> Result<Mappings<(), Value>, Error>

Creates a Map result with value and an empty key.

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 Emit for Header

impl<PrimaryKey> Emit for CollectionHeader<PrimaryKey>

where PrimaryKey: for<'k> Key<'k>,