public static ISymbol <TResult> Gather <TSource, TResult>(
this ISymbolCollection <TSource> source,
Expression <Func <IEnumerable <TSource>, TResult> > reducer
)
{
return(source.CreateQuery <TResult>(
Expression.Call(null,
((MethodInfo)MethodBase.GetCurrentMethod()).MakeGenericMethod(typeof(TSource), typeof(TResult)),
new[] { source.Expression, reducer }
)
));
}
public static ISymbol <TAccumulate> Gather <TSource, TAccumulate>(
this ISymbolCollection <TSource> source,
TAccumulate seed,
Expression <Func <TAccumulate, TSource, TAccumulate> > func
)
{
return(source.CreateQuery <TAccumulate>(
Expression.Call(null,
((MethodInfo)MethodBase.GetCurrentMethod()).MakeGenericMethod(typeof(TSource), typeof(TAccumulate)),
new[] { source.Expression, Expression.Constant(seed), func }
)
));
}