private Node Obj()
{
Token <TokenType> t = PeekNextToken();
switch (t.TokenType)
{
case TokenType.Array:
return(Array());
case TokenType.Hash:
return(Hash());
case TokenType.Regex:
return(Regex());
case TokenType.New:
return(New());
case TokenType.Left_Parenthesis:
GetNextToken();
Node node = Value();
Token <TokenType> rightToken = GetNextToken();
if (rightToken.TokenType != TokenType.Right_Parenthesis)
{
ExceptionHelper.ThrowExpectToken(TokenType.Right_Parenthesis, t.Position);
}
return(node);
case TokenType.ID:
Token <TokenType> idToken = GetNextToken();
Token <TokenType> next = PeekNextToken();
if (next.TokenType == TokenType.ClassQualifier)
{
List <string> strList = new List <string>();
strList.Add(idToken.TokenValue);
while (next.TokenType == TokenType.ClassQualifier)
{
GetNextToken(); //Note:Get the :: operator
idToken = GetNextToken();
if (idToken.TokenType != TokenType.ID)
{
ExceptionHelper.ThrowExpectToken(TokenType.ID, idToken.Position);
}
strList.Add(idToken.TokenValue);
next = PeekNextToken();
}
return(new ClassQualifierNode(strList));
}
else
{
return(new SimpleNode(idToken));
}
case TokenType.String:
case TokenType.Long:
case TokenType.Decimal:
case TokenType.Boolean:
Token <TokenType> valToken = GetNextToken();
return(new SimpleNode(valToken));
default:
ExceptionHelper.ThrowParseError(t.Position);
return(null);
}
}
private Node Factor()
{
Node node = Obj();
Token <TokenType> t = PeekNextToken();
while (!t.End)
{
if (t.TokenType == TokenType.Dot)
{
GetNextToken();
Token <TokenType> idToken = GetNextToken();
if (idToken.TokenType != TokenType.ID)
{
ExceptionHelper.ThrowExpectToken(TokenType.ID, idToken.Position);
}
if (PeekNextToken().TokenType == TokenType.Left_Parenthesis)//Note:Method Call
{
GetNextToken();
ParamListNode method_param_node = ValueList();
Token <TokenType> rightToken = GetNextToken();
if (rightToken.TokenType != TokenType.Right_Parenthesis)
{
ExceptionHelper.ThrowExpectToken(TokenType.Right_Parenthesis, rightToken.Position);
}
MethodNode methodNode = new MethodNode(node, new SimpleNode(idToken), method_param_node);
node = methodNode;
t = PeekNextToken();
continue;
}
else//Note:Property
{
PropertyNode propNode = new PropertyNode(node, new SimpleNode(idToken));
node = propNode;
}
}
else if (t.TokenType == TokenType.Left_Square_Bracket)
{
GetNextToken();
ParamListNode index_param_node = ValueList();
Token <TokenType> rightToken = GetNextToken();
if (rightToken.TokenType != TokenType.Right_Square_Bracket)
{
ExceptionHelper.ThrowExpectToken(TokenType.Right_Square_Bracket, rightToken.Position);
}
IndexerNode indexerNode = new IndexerNode(node, index_param_node);
node = indexerNode;
}
else if (t.TokenType == TokenType.Left_Parenthesis)
{
GetNextToken();
ParamListNode static_method_param_node = ValueList();
Token <TokenType> rightToken = GetNextToken();
if (rightToken.TokenType != TokenType.Right_Parenthesis)
{
ExceptionHelper.ThrowExpectToken(TokenType.Right_Parenthesis, t.Position);
}
MethodNode staticMethodNode = new MethodNode(null, node, static_method_param_node);
node = staticMethodNode;
}
else
{
break;
}
t = PeekNextToken();
}
return(node);
}
