Enum Def 

#[non_exhaustive]
pub enum Def {
    Scalar(ScalarDef),
    Struct(StructDef),
    Map(MapDef),
    List(ListDef),
    Enum(EnumDef),
}

The definition of a shape: is it more like a struct, a map, a list?

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Scalar(ScalarDef)

Scalar — those don’t have a def, they’re not composed of other things. You can interact with them through ValueVTable.

e.g. u32, String, bool, SocketAddr, etc.

Struct(StructDef)

Various kinds of structs, see StructKind

e.g. struct Struct { field: u32 }, struct TupleStruct(u32, u32);, (u32, u32)

Map(MapDef)

Map — keys are dynamic (and strings, sorry), values are homogeneous

e.g. Map<String, T>

List(ListDef)

Ordered list of heterogenous values, variable size

e.g. Vec<T>

Enum(EnumDef)

Enum with variants

e.g. enum Enum { Variant1, Variant2 }

Trait Implementations

impl Clone for Def

fn clone(&self) -> Def

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Def

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

Formats the value using the given formatter.

impl Hash for Def

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, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Def

fn eq(&self, other: &Def) -> 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 Copy for Def

impl Eq for Def

impl StructuralPartialEq for Def