private static void SkipWhiteSpace(this InputReader input)
{
while (input.HasNext() && char.IsWhiteSpace(input.PeekNext()))
{
input.Next();
}
}
internal static string TakeWhile(this InputReader input, Func <char, bool> predicate)
{
input.SkipWhiteSpace();
string token = "";
while (input.HasNext() && predicate(input.PeekNext()))
{
token += input.Next();
}
return(token);
}
internal static bool NextIs(this InputReader input, params char[] anyOf)
{
input.SkipWhiteSpace();
return(input.HasNext() && anyOf.Contains(input.PeekNext()));
}