Struct VariantsByFormat 

pub struct VariantsByFormat {
    pub scalar_variants: Vec<(&'static Variant, &'static Shape)>,
    pub tuple_variants: Vec<(&'static Variant, usize)>,
    pub struct_variants: Vec<&'static Variant>,
    pub unit_variants: Vec<&'static Variant>,
    pub other_variants: Vec<&'static Variant>,
}

Information about variants grouped by their expected format.

Used by deserializers to efficiently dispatch untagged enum parsing based on the type of value encountered.

Fields

scalar_variants: Vec<(&'static Variant, &'static Shape)>

Variants that expect a scalar value (newtype wrapping String, i32, etc.)

tuple_variants: Vec<(&'static Variant, usize)>

Variants that expect a sequence (tuple variants) Grouped by arity for efficient matching.

struct_variants: Vec<&'static Variant>

Variants that expect a mapping (struct variants, newtype wrapping struct)

unit_variants: Vec<&'static Variant>

Unit variants (no data)

other_variants: Vec<&'static Variant>

Other variants that don’t fit the above categories

Implementations

impl VariantsByFormat

pub fn from_shape(shape: &'static Shape) -> Option<Self>

Build variant classification for an enum shape.

Returns None if the shape is not an enum.

pub fn tuple_variants_with_arity(&self, arity: usize) -> Vec<&'static Variant>

Get tuple variants with a specific arity.

pub fn has_scalar_variants(&self) -> bool

Check if there are any scalar-expecting variants.

pub fn has_tuple_variants(&self) -> bool

Check if there are any tuple-expecting variants.

pub fn has_struct_variants(&self) -> bool

Check if there are any struct-expecting variants.

Trait Implementations

impl Debug for VariantsByFormat

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

Formats the value using the given formatter.

impl Default for VariantsByFormat

fn default() -> VariantsByFormat

Returns the “default value” for a type.