edict 0.6.1

Experimental entity-component-system library
Documentation 
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use super::{
    boolean::{BooleanQuery, OrOp},
    read::Read,
    write::Write,
    IntoQuery,
};

marker_type! {
    /// A query adaptor parameterized by a tuple of queries.
    /// Yields a tuple of items from each query wrapped in `Option`.
    /// Yields `None` for queries that do not match the entity.
    /// Skips if no queries match the entity.
    pub struct AnyOf<T>;
}

macro_rules! any_of {
    () => { /* Don't implement for empty tuple */ };
    ($($a:ident)+) => {
        impl<$($a),+> IntoQuery for AnyOf<($(&$a,)+)>
        where
            $($a: Sync + 'static,)+
        {
            type Query = BooleanQuery<($(Read<$a>,)+), OrOp>;

            fn into_query(self) -> Self::Query {
                BooleanQuery::from_tuple(($(Read::<$a>,)*))
            }
        }

        impl<$($a),+> IntoQuery for AnyOf<($(&mut $a,)+)>
        where
            $($a: Send + 'static,)+
        {
            type Query = BooleanQuery<($(Write<$a>,)+), OrOp>;

            fn into_query(self) -> Self::Query {
                BooleanQuery::from_tuple(($(Write::<$a>,)*))
            }
        }
    };
}

for_tuple!(any_of);