Struct Condition 

pub struct Condition {
    pub attribute: String,
    pub present: Option<bool>,
    pub eq: Option<String>,
}

A predicate that must match before a fallback tag can be used.

A condition reads an attribute by exact key—no fallback chaining—and holds up to two predicate fields, all of which must hold (logical AND). A condition with no predicates set always matches.

Fields

attribute: String

Exact attribute name to test, without looking up other names for the same concept.

An absent or null JSON field becomes an empty name, matching upstream decoding.

present: Option<bool>

When set, requires the attribute’s presence (or absence) to match.

eq: Option<String>

When set, requires the attribute’s string value to equal this.

Trait Implementations

impl Clone for Condition

fn clone(&self) -> Condition

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Condition

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

Formats the value using the given formatter.

impl Default for Condition

fn default() -> Condition

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Condition

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.