Trait MapCollection 

pub trait MapCollection:
    Debug
    + Clone
    + Default
    + Send
    + Sync
    + 'static {
    // Required methods
    fn len(&self) -> usize;
    fn iter_values(&self) -> impl Iterator<Item = Value>;
    fn select(v: Value) -> Option<Self>;
    fn project(self) -> Value;
    fn etyp(ft: &FnType) -> Result<Type>;
}

Required Methods

fn len(&self) -> usize

return the length of the collection

fn iter_values(&self) -> impl Iterator<Item = Value>

iterate the collection elements as values

fn select(v: Value) -> Option<Self>

given a value, return Some if the value is the collection type we are mapping.

fn project(self) -> Value

given a collection wrap it in a value

fn etyp(ft: &FnType) -> Result<Type>

return the element type given the function type

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl MapCollection for Map<Value, Value, 32>

fn iter_values(&self) -> impl Iterator<Item = Value>

fn len(&self) -> usize

fn select(v: Value) -> Option<Self>

fn project(self) -> Value

fn etyp(ft: &FnType) -> Result<Type>

impl MapCollection for ValArray

fn iter_values(&self) -> impl Iterator<Item = Value>

fn len(&self) -> usize

fn select(v: Value) -> Option<Self>

fn project(self) -> Value

fn etyp(ft: &FnType) -> Result<Type>

Implementors