[features]
any = ["a", "b"]

error[E0271]: type mismatch resolving `<S as match_engine::strategies::MatchStrategy>::OrderBook == order_book::FastOrderBook`
   --> src\order_book\mod.rs:269:5
    |
269 | /     fn get_possible_matches<S, T>(&self, terms: T) -> Result<S::Matches, S::MatchErr>
270 | |         where S: MatchStrategy<OrderBook=FastOrderBook>,
271 | |               T: Into<S::MatchTerms>,
272 | |     {
273 | |         S::match_strategy(self, terms.into())
274 | |     }
    | |_____^ expected associated type, found struct `order_book::FastOrderBook`
    |
    = note: expected associated type `<S as match_engine::strategies::MatchStrategy>::OrderBook`
                        found struct `order_book::FastOrderBook`
    = note: the requirement `<S as match_engine::strategies::MatchStrategy>::OrderBook == order_book::FastOrderBook` appears on the impl method but not on the corresponding trait method

impl OrderBookTrait for FastOrderBook {
    fn get_possible_matches<S, T>(&self, terms: T) -> Result<S::Matches, S::MatchErr>
        where S: MatchStrategy<OrderBook=Self>,
              T: Into<S::MatchTerms>,
    {
        S::match_strategy(self, terms.into())
    }

    pub trait MatchStrategy {
        type OrderBook;

        type MatchTerms;

        type Matches;
        type MatchErr;

        fn match_strategy(
            order_book: &Self::OrderBook, terms: Self::MatchTerms,
        ) -> Result<Self::Matches, Self::MatchErr>;
    }