Enum sea_orm_rocket::figment::value::magic::Either

pub enum Either<A, B> {
    Left(A),
    Right(B),
}

(De)serializes as either a magic value A or any other deserializable value B.

An Either<A, B> deserializes as either an A or B, whichever succeeds first.

The usual Either implementation or an “untagged” enum does not allow its internal values to provide hints to the deserializer. These hints are required for magic values to work. By contrast, this Either does provide the appropriate hints.

Example

use serde::{Serialize, Deserialize};
use figment::{Figment, value::magic::{Either, RelativePathBuf, Tagged}};

#[derive(Debug, PartialEq, Deserialize, Serialize)]
struct Config {
    int_or_str: Either<Tagged<usize>, String>,
    path_or_bytes: Either<RelativePathBuf, Vec<u8>>,
}

fn figment<A: Serialize, B: Serialize>(a: A, b: B) -> Figment {
    Figment::from(("int_or_str", a)).merge(("path_or_bytes", b))
}

let config: Config = figment(10, "/a/b").extract().unwrap();
assert_eq!(config.int_or_str, Either::Left(10.into()));
assert_eq!(config.path_or_bytes, Either::Left("/a/b".into()));

let config: Config = figment("hi", "c/d").extract().unwrap();
assert_eq!(config.int_or_str, Either::Right("hi".into()));
assert_eq!(config.path_or_bytes, Either::Left("c/d".into()));

let config: Config = figment(123, &[1, 2, 3]).extract().unwrap();
assert_eq!(config.int_or_str, Either::Left(123.into()));
assert_eq!(config.path_or_bytes, Either::Right(vec![1, 2, 3].into()));

let config: Config = figment("boo!", &[4, 5, 6]).extract().unwrap();
assert_eq!(config.int_or_str, Either::Right("boo!".into()));
assert_eq!(config.path_or_bytes, Either::Right(vec![4, 5, 6].into()));

let config: Config = Figment::from(figment::providers::Serialized::defaults(Config {
    int_or_str: Either::Left(10.into()),
    path_or_bytes: Either::Left("a/b/c".into()),
})).extract().unwrap();

assert_eq!(config.int_or_str, Either::Left(10.into()));
assert_eq!(config.path_or_bytes, Either::Left("a/b/c".into()));

let config: Config = Figment::from(figment::providers::Serialized::defaults(Config {
    int_or_str: Either::Right("hi".into()),
    path_or_bytes: Either::Right(vec![3, 7, 13]),
})).extract().unwrap();

assert_eq!(config.int_or_str, Either::Right("hi".into()));
assert_eq!(config.path_or_bytes, Either::Right(vec![3, 7, 13]));

Variants

Left(A)

Tuple Fields

0: A

The “left” variant.

Right(B)

Tuple Fields

0: B

The “right” variant.

Trait Implementations

impl<A, B> Clone for Either<A, B> where
    A: Clone,
    B: Clone, 

pub fn clone(&self) -> Either<A, B>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<A, B> Debug for Either<A, B> where
    A: Debug,
    B: Debug, 

pub fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<'de, 'b, A, B> Deserialize<'de> for Either<A, B> where
    'de: 'b,
    A: Magic,
    B: Deserialize<'b>, 

pub fn deserialize<D>(
    de: D
) -> Result<Either<A, B>, <D as Deserializer<'de>>::Error> where
    D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl<A, B> Hash for Either<A, B> where
    A: Hash,
    B: Hash, 

pub fn hash<__H>(&self, state: &mut __H) where
    __H: Hasher, 

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl<A, B> Ord for Either<A, B> where
    A: Ord,
    B: Ord, 

pub fn cmp(&self, other: &Either<A, B>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval.

impl<A, B> PartialEq<Either<A, B>> for Either<A, B> where
    A: PartialEq<A>,
    B: PartialEq<B>, 

pub fn eq(&self, other: &Either<A, B>) -> bool

This method tests for self and other values to be equal, and is used by ==.

pub fn ne(&self, other: &Either<A, B>) -> bool

This method tests for !=.

impl<A, B> PartialOrd<Either<A, B>> for Either<A, B> where
    A: PartialOrd<A>,
    B: PartialOrd<B>, 

pub fn partial_cmp(&self, other: &Either<A, B>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl<A, B> Serialize for Either<A, B> where
    A: Serialize,
    B: Serialize, 

pub fn serialize<__S>(
    &self,
    __serializer: __S
) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error> where
    __S: Serializer, 

Serialize this value into the given Serde serializer.

impl<A, B> Eq for Either<A, B> where
    A: Eq,
    B: Eq, 

impl<A, B> StructuralEq for Either<A, B>

impl<A, B> StructuralPartialEq for Either<A, B>