Enum BinValue 

pub enum BinValue {
    Flag(bool),
    Config(BinConfig),
}

"bin": true | {"maxbins": N} | {"step": w}. false is accepted and means absent (Vega-Lite emits it; rejecting would be noise). Numbers stay permissive (f64) so preflight can TEACH — serde must not bounce maxbins: 0 with a generic type error before validation can explain it.

Variants

Flag(bool)

Config(BinConfig)

Trait Implementations

impl Clone for BinValue

fn clone(&self) -> BinValue

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for BinValue

impl Debug for BinValue

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for BinValue

A hand-written Deserialize instead of #[serde(untagged)]: untagged buffers the value and, on failure, collapses to a generic “data did not match any variant” — swallowing BinConfig’s precise unknown-field message. Delegating the map form to BinConfig preserves “unknown field extent, expected maxbins or step” (the codebase-wide deny_unknown_fields contract) and rejects a bare number/string with a clear expecting line — so {"bin": {"extent": [0,1]}} and {"bin": 3} both fail AT the bin value, never silently matching Flag.

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.