// something.someValue
// something[i]
// something(*).x(*).y
private bool ParseAccessExpression(ref ASTNode retn)
{
if (tokenStream.Current != ExpressionTokenType.Identifier)
{
return(false);
}
string identifier = tokenStream.Current.value;
tokenStream.Save();
LightList <ASTNode> parts = LightList <ASTNode> .Get();
tokenStream.Advance();
while (tokenStream.HasMoreTokens)
{
if (tokenStream.Current == ExpressionTokenType.Dot || tokenStream.Current == ExpressionTokenType.Elvis)
{
if (tokenStream.Next != ExpressionTokenType.Identifier)
{
break;
}
tokenStream.Advance();
parts.Add(ASTNode.DotAccessNode(tokenStream.Current.value, tokenStream.Previous == ExpressionTokenType.Elvis));
tokenStream.Advance();
if (tokenStream.HasMoreTokens)
{
continue;
}
}
else if (tokenStream.Current == ExpressionTokenType.ArrayAccessOpen || tokenStream.Current == ExpressionTokenType.QuestionMark && tokenStream.NextTokenIs(ExpressionTokenType.ArrayAccessOpen))
{
bool isElvis = false;
if (tokenStream.Current == ExpressionTokenType.QuestionMark)
{
isElvis = true;
tokenStream.Advance();
}
int advance = tokenStream.FindMatchingIndex(ExpressionTokenType.ArrayAccessOpen, ExpressionTokenType.ArrayAccessClose);
if (advance == -1)
{
Abort("Unmatched array bracket");
}
ExpressionParser subParser = CreateSubParser(advance);
parts.Add(ASTNode.IndexExpressionNode(subParser.ParseLoop(), isElvis));
subParser.Release();
if (tokenStream.HasMoreTokens)
{
continue;
}
}
else if (tokenStream.Current == ExpressionTokenType.ParenOpen)
{
LightList <ASTNode> parameters = null;
if (!ParseListExpression(ref parameters, ExpressionTokenType.ParenOpen, ExpressionTokenType.ParenClose))
{
Abort();
}
parts.Add(ASTNode.InvokeNode(parameters));
if (tokenStream.HasMoreTokens)
{
continue;
}
}
else if (tokenStream.Current == ExpressionTokenType.LessThan)
{
// shortcut the << operator since we can't have a << in a generic type node. List<<string>> is invalid for example
if (tokenStream.HasMoreTokens && tokenStream.Next == ExpressionTokenType.LessThan)
{
tokenStream.Restore();
LightList <ASTNode> .Release(ref parts);
return(false);
}
TypeLookup typePath = new TypeLookup();
if (!(ParseTypePathGenerics(ref typePath)))
{
tokenStream.Restore();
LightList <ASTNode> .Release(ref parts);
return(false);
}
parts.Add(ASTNode.GenericTypePath(typePath));
if (tokenStream.HasMoreTokens)
{
continue;
}
}
if (parts.Count == 0)
{
tokenStream.Restore();
LightList <ASTNode> .Release(ref parts);
return(false);
}
retn = ASTNode.MemberAccessExpressionNode(identifier, parts).WithLocation(tokenStream.Peek());
return(true);
}
ReleaseList(parts);
tokenStream.Restore();
return(false);
}
