Function tx_query_double_attribute 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn tx_query_double_attribute(
    doc: *const TxDocument,
    el: TxNodeId,
    name: *const c_char,
    value: *mut c_double,
) -> TxError

Queries a double (f64) attribute value.

On success, writes the value to *value and returns TxSuccess.

Safety

• doc must be a valid, non-null pointer to a TxDocument.
• name must be a valid, non-null pointer to a null-terminated UTF-8 string.
• value must be a valid, non-null pointer to a c_double.