public override IQueryable <T> VisitReduce(RiqlParser.ReduceContext context)
{
var previous = base.VisitReduce(context);
var parameter = Expression.Parameter(typeof(T), "i");
var inits = context.property()
.Select(a => this._propertyAccessor.ParsePath(parameter, a.GetText()))
.Select(v => (MemberExpression)v.Expression)
.Select(m => Expression.Bind(m.Member, m));
var create = Expression.New(typeof(T));
var init = Expression.MemberInit(create, inits);
var reducer = Expression.Lambda <Func <T, T> >(init, parameter);
this._current = previous.Select(reducer);
return(this._current);
}
/// <summary>
/// Visit a parse tree produced by <see cref="RiqlParser.reduce"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public virtual Result VisitReduce([NotNull] RiqlParser.ReduceContext context)
{
return(VisitChildren(context));
}
