private static IParseResult <IEnumerable <TValue> > YieldMany <TValue>(
this IParseResult <TValue> result,
TValue value,
int length)
{
Contract.Requires(result != null);
Contract.Requires(length >= 0);
Contract.Ensures(Contract.Result <IParseResult <IEnumerable <TValue> > >() != null);
var lookAhead = result as ILookAheadParseResult <TValue>;
if (lookAhead != null)
{
var newLookAhead = new LookAheadParseResult <IEnumerable <TValue> >(
new List <TValue>()
{
value
}
.AsReadOnly(),
length);
newLookAhead.Subscribe(lookAhead.OnCompleted);
return(newLookAhead);
}
else
{
return(new ParseResult <IEnumerable <TValue> >(
new List <TValue>()
{
value
}
.AsReadOnly(),
length));
}
}
internal static IParseResult <TNewValue> Yield <TOldValue, TNewValue>(
this IParseResult <TOldValue> result,
TNewValue value,
int length)
{
Contract.Requires(result != null);
Contract.Requires(length >= 0);
Contract.Ensures(Contract.Result <IParseResult <TNewValue> >() != null);
var lookAhead = result as ILookAheadParseResult <TOldValue>;
if (lookAhead != null)
{
var newLookAhead = new LookAheadParseResult <TNewValue>(value, length);
newLookAhead.Subscribe(lookAhead.OnCompleted);
return(newLookAhead);
}
else
{
return(new ParseResult <TNewValue>(value, length));
}
}