public static bool TryReadUntilAny(this ICharReader reader, out string result, ISet <char> charset)
{
while (true)
{
if (!reader.HasNext())
{
result = string.Empty;
return(false);
}
var next = reader.PeekNext();
if (!charset.Contains(next))
{
break;
}
reader.ReadNext();
}
var builder = new StringBuilder();
while (reader.HasNext())
{
var next = reader.ReadNext();
if (charset.Contains(next))
{
break;
}
builder.Append(next);
}
result = builder.ToString();
return(true);
}
public static string ReadUntilAny(this ICharReader reader, ISet <char> charset)
{
while (true)
{
if (!reader.HasNext())
{
return(null);
}
var next = reader.PeekNext();
if (!charset.Contains(next))
{
break;
}
reader.ReadNext();
}
var result = new StringBuilder();
while (reader.HasNext())
{
var next = reader.ReadNext();
if (charset.Contains(next))
{
break;
}
result.Append(next);
}
return(result.ToString());
}