Macro try_from_secs

macro_rules! try_from_secs {
    (
        secs = $secs: expr,
        mantissa_bits = $mant_bits: literal,
        exponent_bits = $exp_bits: literal,
        offset = $offset: literal,
        bits_ty = $bits_ty:ty,
        double_ty = $double_ty:ty,
    ) => { ... };
}