Struct roa_core::Bucket

pub struct Bucket(_);

A wrapper of HashMap<String, String>, method get return a Variable.

Example

use roa_core::{Bucket, Variable};
let mut bucket = Bucket::new();
assert!(bucket.get("id").is_none());
assert!(bucket.insert("id", "1").is_none());
assert_eq!(1, bucket.get("id").unwrap().parse().unwrap());
assert_eq!(1, bucket.insert("id", "2").unwrap().parse().unwrap());

Methods

impl Bucket

pub fn new() -> Self

Construct an empty Bucket.

pub fn insert<'a>(
    &mut self,
    name: &'a str,
    value: impl ToString
) -> Option<Variable<'a>>

Inserts a key-value pair into the bucket.

If the bucket did not have this key present, None is returned.

If the bucket did have this key present, the value is updated, and the old value is returned.

Example

use roa_core::{Bucket, Variable};
let mut bucket = Bucket::new();
assert!(bucket.insert("id", "1").is_none());
assert_eq!(1, bucket.insert("id", "2").unwrap().parse().unwrap());

pub fn get<'a>(&self, name: &'a str) -> Option<Variable<'a>>

If the bucket did not have this key present, None is returned.

If the bucket did have this key present, the key-value pair will be returned as a Variable

Example

use roa_core::{Bucket, Variable};
let mut bucket = Bucket::new();
assert!(bucket.get("id").is_none());
bucket.insert("id", "1");
assert_eq!(1, bucket.get("id").unwrap().parse().unwrap());

Trait Implementations

impl Clone for Bucket

fn clone(&self) -> Bucket

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Bucket

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

Formats the value using the given formatter.

impl Default for Bucket

fn default() -> Self

Returns the "default value" for a type.