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json_option_bool

sup_xml_core::xpath::eval

Function json_option_bool 

Source 
pub fn json_option_bool<I: DocIndexLike>(
    opts: Option<&Value>,
    key: &str,
    idx: &I,
) -> Result<Option<bool>, XmlError>
Expand description

Validate and read a boolean-typed JSON option (F&O §17.5): the value must be exactly one xs:boolean. Absent → Ok(None); wrong type/cardinality → FOJS0005.