Macro search_database

macro_rules! search_database {
    (($ldb:expr) /$($($con:ident)?$(($can:expr))?)/ *) => { ... };
    (($ldb:expr) /$($($con:ident)?$(($can:expr))?)/ *::$($item:ident)?$(($obj:expr))?) => { ... };
    (($ldb:expr) $($item:ident)?$(($obj:expr))?) => { ... };
}

Used for reading from a LazyDB with less boiler-plate