Function interp_op_lt 

fn interp_op_lt(
    args: &[RValue],
    _named: &[(String, RValue)],
    context: &BuiltinContext<'_>,
) -> Result<RValue, RError>

Less-than comparison operator as a function.

@param e1 first operand @param e2 second operand @return logical vector indicating element-wise less-than