internal static CTFTypeSpecifier Parse(CTFScope scope, TokParser tp)
{
tp.MustBe(Token.EnumId.VARIANT);
tp.MustBe(Token.EnumId.LT);
CTFUnaryExpression cue = CTFUnaryExpression.Parse(tp);
if (cue == null)
{
throw new CTFException();
}
tp.MustBe(Token.EnumId.GT);
tp.MustBe(Token.EnumId.LCURL);
List <CTFStructOrVariantDeclaration> list = CTFStructOrVariantDeclaration.ParseList(scope, tp);
tp.MustBe(Token.EnumId.RCURL);
return(new CTFVaraintSpecifier(Token.EnumId.VARIANT, cue, list));
}
internal static List <CTFStructOrVariantDeclaration> ParseList(CTFScope scope, TokParser tp)
{
List <CTFStructOrVariantDeclaration> list = new List <CTFStructOrVariantDeclaration>();
for (;;)
{
CTFStructOrVariantDeclaration item = Parse(scope, tp);
if (item == null)
{
break;
}
tp.MustBe(Token.EnumId.TERM);
list.Add(item);
}
if (list.Count == 0)
{
return(null);
}
return(list);
}
internal static CTFTypeSpecifier Parse(CTFScope scope, TokParser tp)
{
string name = null;
List <CTFStructOrVariantDeclaration> list = null;
if (!tp.Match(Token.EnumId.STRUCT))
{
return(null);
}
if (tp.Token.Id == Token.EnumId.IDEN)
{
name = tp.Token.Buffer;
tp.Next();
}
if (tp.Match(Token.EnumId.LCURL))
{
list = CTFStructOrVariantDeclaration.ParseList(scope, tp);
tp.MustBe(Token.EnumId.RCURL);
}
int align = 0;
if (tp.Match(Token.EnumId.ALIGN))
{
tp.MustBe(Token.EnumId.LPAREN);
CTFUnaryExpression cue = CTFUnaryExpression.Parse(tp);
tp.MustBe(Token.EnumId.RPAREN);
align = cue.Calculate();
}
CTFType ct = CTFType.GetStructType(scope, name, list, align);
return(new CTFStructSpecifier(ct));
}
