public static bool TryParseDefine(IParser parser, out TypeDefinitionNode defNode, bool isPublic = false)
{
defNode = null;
bool result = false;
if (parser.PeekToken(TokenCategory.Identifier) || parser.PeekToken(TokenCategory.Keyword))
{
defNode = new TypeDefinitionNode();
result = true;
parser.NextToken();
defNode.StartIndex = parser.Token.Span.Start;
defNode._location = parser.TokenLocation;
defNode.Identifier = parser.Token.Token.Value.ToString();
defNode._isPublic = isPublic;
TypeReference typeRef;
if (TypeReference.TryParseNode(parser, out typeRef, false, isPublic) && typeRef != null)
{
defNode.Children.Add(typeRef.StartIndex, typeRef);
if (defNode.Children.All(x => x.Value.IsComplete))
{
defNode.EndIndex = defNode.Children.Last().Value.EndIndex;
defNode.IsComplete = true;
}
}
else
{
parser.ReportSyntaxError("Invalid syntax found in type definition.");
}
}
return(result);
}
public static bool TryParseNode(IParser parser, out TypeDefNode defNode, out bool matchedBreakSequence, List <List <TokenKind> > breakSequences = null)
{
defNode = null;
bool result = false;
matchedBreakSequence = false;
AccessModifier?accMod = null;
string accModToken = null;
if (parser.PeekToken(TokenKind.PublicKeyword))
{
accMod = AccessModifier.Public;
accModToken = parser.PeekToken().Value.ToString();
}
else if (parser.PeekToken(TokenKind.PrivateKeyword))
{
accMod = AccessModifier.Private;
accModToken = parser.PeekToken().Value.ToString();
}
uint lookAheadBy = (uint)(accMod.HasValue ? 2 : 1);
if (parser.PeekToken(TokenKind.TypeKeyword, lookAheadBy))
{
result = true;
defNode = new TypeDefNode();
if (accMod.HasValue)
{
parser.NextToken();
defNode.AccessModifier = accMod.Value;
}
else
{
defNode.AccessModifier = AccessModifier.Public;
}
parser.NextToken(); // move past the Type keyword
defNode.StartIndex = parser.Token.Span.Start;
TypeDefinitionNode constDef;
while (true)
{
if (TypeDefinitionNode.TryParseDefine(parser, out constDef, defNode.AccessModifier == AccessModifier.Public) && constDef != null)
{
defNode.Children.Add(constDef.StartIndex, constDef);
}
else
{
break;
}
if (parser.PeekToken(TokenKind.Comma))
{
parser.NextToken();
}
if (breakSequences != null)
{
bool matchedBreak = false;
foreach (var seq in breakSequences)
{
bool bsMatch = true;
uint peekaheadCount = 1;
foreach (var kind in seq)
{
if (parser.PeekToken(kind, peekaheadCount))
{
peekaheadCount++;
}
else
{
bsMatch = false;
break;
}
}
if (bsMatch)
{
matchedBreak = true;
break;
}
}
if (matchedBreak)
{
matchedBreakSequence = true;
break;
}
}
}
if (defNode.Children.Count > 0 && defNode.Children.All(x => x.Value.IsComplete))
{
defNode.EndIndex = defNode.Children.Last().Value.EndIndex;
defNode.IsComplete = true;
}
}
return(result);
}