Struct Json 

pub struct Json(pub Option<Mutation<Value>>);

Available on crate feature json only.

JSON adapter for morphix mutation serialization.

Json implements the Adapter trait using serde_json::Value for both Replace and Append operations. This adapter is available when the json feature is enabled.

Example

use morphix::adapter::Json;
use morphix::{Observe, observe};
use serde::Serialize;

#[derive(Serialize, Observe)]
struct Data {
    value: i32,
}

let mut data = Data { value: 42 };
let Json(mutation) = observe!(data => {
    data.value += 1;
}).unwrap();

Tuple Fields

0: Option<Mutation<Value>>

Trait Implementations

impl Adapter for Json

type Value = Value

Type used to represent Replace and Append values.

type Error = Error

Error type for serialization / deserialization operations.

fn from_mutation(mutation: Option<Mutation<Self::Value>>) -> Self

Constructs the adapter from an optional mutation.

fn serialize_value<T: Serialize + ?Sized>( value: &T, ) -> Result<Self::Value, Self::Error>

Serializes a value into the adapter’s Value type.

fn get_mut<'a>( value: &'a mut Self::Value, segment: &PathSegment, allow_create: bool, ) -> Option<&'a mut Self::Value>

Gets a mutable reference to a nested value by path segment.

fn append(value: &mut Self::Value, append_value: Self::Value) -> Option<usize>

Available on crate feature append only.

Appends a value to the end of another value.

fn len(value: &Self::Value) -> Option<usize>

Available on crate feature append only.

Returns the appendable length of a value.

fn truncate(value: &mut Self::Value, truncate_len: usize) -> Option<usize>

Available on crate feature truncate only.

Truncates a value by removing elements from the end.

fn mutate( value: &mut Self::Value, mutation: Mutation<Self::Value>, path_stack: &mut Path<false>, ) -> Result<(), MutationError>

Applies a Mutation to an existing value.

impl Clone for Json

fn clone(&self) -> Json

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Json

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

Formats the value using the given formatter.

impl PartialEq for Json

fn eq(&self, other: &Json) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for Json

impl StructuralPartialEq for Json