private List <T> CollectRecover <T>(PonyTokenSet recover, System.Func <T?> tryParse) where T : class
{
var items = new List <T>();
while (true)
{
try
{
var item = tryParse();
if (item != null)
{
items.Add(item);
}
else
{
break;
}
}
catch (JokeException joke)
{
Errors.Add(joke.Error);
SkipUntil(recover);
}
}
return(items);
}
private void SkipUntil(PonyTokenSet tokens)
{
while (next < limit && !tokens[Tokens[next].Kind])
{
next += 1;
}
}
private void Begin(PonyTokenSet set)
{
if (next < limit)
{
marks.Push(next);
}
Match(set);
}
private void Match(PonyTokenSet set)
{
if (next < limit && set[Tokens[next].Kind])
{
next += 1;
return;
}
throw NoParse("expected something (not EOF)");
}
static First()
{
Class = new PonyTokenSet(
TK.Class,
TK.Type,
TK.Interface,
TK.Trait,
TK.Primitive,
TK.Struct,
TK.Actor);
Use = new PonyTokenSet(
TK.Use);
Module = PonyTokenSet.Union(Use, Class);
Atom = new PonyTokenSet(
TK.Identifier,
TK.This,
TK.String,
TK.DocString,
TK.Char,
TK.Int,
TK.Float,
TK.True,
TK.False,
TK.LParen,
TK.LParenNew,
TK.LSquare,
TK.LSquareNew,
TK.Object,
TK.LBrace,
TK.AtLBrace,
TK.At,
TK.Location,
TK.If,
TK.While,
TK.For);
Prefix = new PonyTokenSet(
TK.Addressof,
TK.DigestOf,
TK.Not,
TK.Minus,
TK.MinusNew,
TK.MinusTilde,
TK.MinusTildeNew);
Postfix = Atom;
ParamPattern = PonyTokenSet.Union(Prefix, Postfix);
Local = new PonyTokenSet(TK.Var, TK.Let, TK.Embed);
Field = Local;
Method = new PonyTokenSet(TK.Fun, TK.Be, TK.New);
Pattern = PonyTokenSet.Union(ParamPattern, Local);
Term = new PonyTokenSet(
TK.If,
TK.Ifdef,
TK.Iftype,
TK.Match,
TK.While,
TK.Repeat,
TK.For,
TK.With,
TK.Try,
TK.Recover,
TK.Consume,
TK.Constant)
.Union(Pattern);
Jump = new PonyTokenSet(
TK.Return,
TK.Break,
TK.Continue,
TK.Error,
TK.CompileIntrinsic,
TK.CompileError);
Infix = Term;
Assignment = Infix;
ExprSeq = Assignment;
RawSeq = PonyTokenSet.Union(Jump, ExprSeq);
Lambda = new PonyTokenSet(TK.LBrace, TK.AtLBrace);
RecoverInModule = Module;
RecoverInClass = PonyTokenSet.Union(RecoverInModule, Method, Field);
RecoverNothing = new PonyTokenSet();
}