Function duckdb_hugeint_to_double 

pub unsafe extern "C" fn duckdb_hugeint_to_double(
    val: duckdb_hugeint,
) -> f64

Converts a duckdb_hugeint object (as obtained from a DUCKDB_TYPE_HUGEINT column) into a double.

@param val The hugeint value. @return The converted double element.