Trait Schema 

pub trait Schema: Sized {
    // Required methods
    fn shape() -> Shape;
    fn read(v: &ValueRef<'_>, cx: &mut Reader<'_>) -> Option<Self>;
    fn write(&self) -> Value;

    // Provided methods
    fn absent() -> Option<Self> { ... }
    fn skip(&self) -> bool { ... }
}

A Yog Data format.

Required Methods

fn shape() -> Shape

What the format looks like.

fn read(v: &ValueRef<'_>, cx: &mut Reader<'_>) -> Option<Self>

Reads v. Problems go to cx at its current path; None when the value couldn’t be read (the problem is in cx).

fn write(&self) -> Value

The value, as the format writes it.

Provided Methods

fn absent() -> Option<Self>

The value of a field that isn’t there — None: the field is required.

fn skip(&self) -> bool

Whether a struct leaves this field out when writing it.

Dyn Compatibility

This trait is not dyn compatible.

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

Implementations on Foreign Types

impl Schema for String

fn shape() -> Shape

fn read(v: &ValueRef<'_>, cx: &mut Reader<'_>) -> Option<Self>

fn write(&self) -> Value

impl Schema for bool

fn shape() -> Shape

fn read(v: &ValueRef<'_>, cx: &mut Reader<'_>) -> Option<Self>

fn write(&self) -> Value

impl Schema for f32

fn shape() -> Shape

fn read(v: &ValueRef<'_>, cx: &mut Reader<'_>) -> Option<Self>

fn write(&self) -> Value

impl Schema for f64

fn shape() -> Shape

fn read(v: &ValueRef<'_>, cx: &mut Reader<'_>) -> Option<Self>

fn write(&self) -> Value

impl Schema for i8

fn shape() -> Shape

fn read(v: &ValueRef<'_>, cx: &mut Reader<'_>) -> Option<Self>

fn write(&self) -> Value

impl Schema for i16

fn shape() -> Shape

fn read(v: &ValueRef<'_>, cx: &mut Reader<'_>) -> Option<Self>

fn write(&self) -> Value

impl Schema for i32

fn shape() -> Shape

fn read(v: &ValueRef<'_>, cx: &mut Reader<'_>) -> Option<Self>

fn write(&self) -> Value

impl Schema for i64

fn shape() -> Shape

fn read(v: &ValueRef<'_>, cx: &mut Reader<'_>) -> Option<Self>

fn write(&self) -> Value

impl Schema for u8

fn shape() -> Shape

fn read(v: &ValueRef<'_>, cx: &mut Reader<'_>) -> Option<Self>

fn write(&self) -> Value

impl Schema for u16

fn shape() -> Shape

fn read(v: &ValueRef<'_>, cx: &mut Reader<'_>) -> Option<Self>

fn write(&self) -> Value

impl Schema for u32

fn shape() -> Shape

fn read(v: &ValueRef<'_>, cx: &mut Reader<'_>) -> Option<Self>

fn write(&self) -> Value

impl Schema for u64

fn shape() -> Shape

fn read(v: &ValueRef<'_>, cx: &mut Reader<'_>) -> Option<Self>

fn write(&self) -> Value

impl Schema for usize

fn shape() -> Shape

fn read(v: &ValueRef<'_>, cx: &mut Reader<'_>) -> Option<Self>

fn write(&self) -> Value

impl<A: Schema, B: Schema> Schema for (A, B)

A pair, written [a, b] (a point, a size).

fn shape() -> Shape

fn read(v: &ValueRef<'_>, cx: &mut Reader<'_>) -> Option<Self>

fn write(&self) -> Value

impl<T: Schema, const N: usize> Schema for [T; N]

fn shape() -> Shape

fn read(v: &ValueRef<'_>, cx: &mut Reader<'_>) -> Option<Self>

fn write(&self) -> Value

impl<T: Schema> Schema for BTreeMap<String, T>

fn shape() -> Shape

fn read(v: &ValueRef<'_>, cx: &mut Reader<'_>) -> Option<Self>

fn write(&self) -> Value

impl<T: Schema> Schema for Box<T>

fn shape() -> Shape

fn read(v: &ValueRef<'_>, cx: &mut Reader<'_>) -> Option<Self>

fn write(&self) -> Value

fn absent() -> Option<Self>

fn skip(&self) -> bool

impl<T: Schema> Schema for HashMap<String, T>

fn shape() -> Shape

fn read(v: &ValueRef<'_>, cx: &mut Reader<'_>) -> Option<Self>

fn write(&self) -> Value

impl<T: Schema> Schema for Option<T>

fn shape() -> Shape

fn read(v: &ValueRef<'_>, cx: &mut Reader<'_>) -> Option<Self>

fn write(&self) -> Value

fn absent() -> Option<Self>

fn skip(&self) -> bool

impl<T: Schema> Schema for Vec<T>

fn shape() -> Shape

fn read(v: &ValueRef<'_>, cx: &mut Reader<'_>) -> Option<Self>

fn write(&self) -> Value

Implementors

impl Schema for AnyRefOrTag

impl Schema for Color

impl Schema for Image

impl Schema for Ref

impl Schema for Res

impl Schema for Text

impl Schema for Value

impl<K: Kind> Schema for Id<K>

impl<K: Kind> Schema for OneOrTag<K>

impl<K: Kind> Schema for TagId<K>

impl<T: Schema> Schema for Ordered<T>