Trait tau_engine::Array[−][src]

pub trait Array {
    fn iter(&self) -> Box<dyn Iterator<Item = Value<'_>>>;

    fn len(&self) -> usize;
}
Expand description

A data type that can be represented as an Array.

This allows more complex array-like data types to be represented in a generic way for use as a Value.

Implementations

As long as the data type is considered array-like then Array can be implemented on that type. Below is a contrived example:

use tau_engine::{Array, Value};

// NOTE: Implements Iterator
#[derive(Clone)]
struct Counter {
   count: usize,
}


impl Array for Counter {
    fn iter(&self) -> Box<dyn Iterator<Item = Value<'_>> + '_> {
        Box::new(self.clone().map(|v| Value::UInt(v as u64)))
    }

    fn len(&self) -> usize {
        self.clone().count()
    }
}

Required methods

Returns a boxed iterator of Value items.

Example

use std::collections::HashSet;
use tau_engine::{Array, Value};

let mut set = HashSet::new();
set.insert(1);

let mut value = Array::iter(&set);

assert_eq!(value.next().is_some(), true);

Returns the length of the array.

Example

 use std::collections::HashSet;
 use tau_engine::{Array, Value};

 let mut set = HashSet::new();
 set.insert(1);

 let len = Array::len(&set);

 assert_eq!(len, 1);

Implementations on Foreign Types

Implementors