/// Construct a BSON value
#[macro_export]
macro_rules! bson {
    ([]) => ( $crate::bson::Bson::Array(Vec::new()) );

    ([$($val:tt),*]) => {{
        let mut array = Vec::new();

        $(
            array.push(bson!($val));
        )*

        $crate::bson::Bson::Array(array)
    }};

    ([$val:expr]) => (
        $crate::bson::Bson::Array(vec!(::std::convert::From::from($val)))
    );

    ({ $($k:expr => $v:tt),* }) => (
        $crate::bson::Bson::Document(doc! {
            $(
                $k => $v
            ),*
        })
    );

    ($val:expr) => (
        ::std::convert::From::from($val)
    );
}

/// Construct a BSON Document
#[macro_export]
macro_rules! doc {
    () => ( $crate::bson::Document::new() );

    ( $($key:expr => $val:tt),* ) => {{
        let mut document = $crate::bson::Document::new();

        $(
            document.insert_bson($key.to_string(), bson!($val));
        )*

        document
    }};
}