public static bool IsEof(
this ArgsTokenizer tokenizer)
{
if (tokenizer.GetLocation() == tokenizer.Scanner.Position)
{
return(tokenizer.Scanner.IsEof());
}
return(false);
}
///
public static int GetLocation(
this ArgsTokenizer tokenizer)
{
if (tokenizer.Position + 1 <= tokenizer.Tokens.Count)
{
return(tokenizer.Tokens.ElementAt(tokenizer.Position).Position);
}
return(tokenizer.Scanner.Position);
}
public static bool MatchOptionToken(
this ArgsTokenizer tokenizer)
{
if (tokenizer.Peek() is OptionName)
{
return(true);
}
return(false);
}
private static Argument NextArgument(
this ArgsTokenizer tokenizer)
{
var position = tokenizer.Scanner.Position;
///
return(new Argument(
source: tokenizer.Scanner.Next(),
position: position));
}
private static OptionName NextOptionToken(
this ArgsTokenizer tokenizer)
{
var position = tokenizer.Scanner.Position;
///
return(new OptionName(
source: tokenizer.Scanner.Next(),
position: position));
}
///
public static Argument?MaybeNext(
this ArgsTokenizer tokenizer)
{
var next = tokenizer.Peek();
if (next != null)
{
tokenizer.Position++;
}
return(next);
}
public static Argument?MaybeNextArgument(
this ArgsTokenizer tokenizer)
{
var next = tokenizer.MaybeNext();
///
if (next is Argument t)
{
return(t);
}
///
return(null);
}
///
public static OptionName?MaybeNextOptionToken(
this ArgsTokenizer tokenizer)
{
var next = tokenizer.MaybeNext();
///
if (next is OptionName t)
{
return(t);
}
///
return(null);
}
private static Argument Next(
this ArgsTokenizer tokenizer)
{
switch (tokenizer.Scanner.Peek())
{
case String next when next.StartsWith("--"):
return(tokenizer.NextOptionToken());
case String next when next.StartsWith("/") || next.EndsWith(".dll") || next == "./":
return(tokenizer.NextUnknownArgument());
case String _:
return(tokenizer.NextArgument());
default:
throw new Exception();
}
}
public static Argument?Peek(
this ArgsTokenizer tokenizer)
{
if (tokenizer.Position + 1 <= tokenizer.Tokens.Count)
{
return(tokenizer.Tokens.ElementAt(tokenizer.Position));
}
///
if (tokenizer.Scanner.IsEof())
{
return(null);
}
///
var next = tokenizer.Next();
tokenizer.Tokens.Add(next);
return(next);
}
