public static IfStatementNode parse(int TokenNumber)
{
IfStatementNode node = new IfStatementNode();
if (!Parser.NeededToken(TokenNumber, "value", "if", 0))
{
node.BadParsed = true;
node.ErrorLine = Parser.TokensArray[Math.Min(TokenNumber, Parser.TokensArray.Length - 1)].Line;
return(node);
}
TokenNumber++;
ExpressionNode ExprNode = ExpressionParser.parse(TokenNumber);
if (ExprNode.BadParsed)
{
node.BadParsed = true;
node.ErrorLine = ExprNode.ErrorLine;
return(node);
}
node.SetExpression(ExprNode);
TokenNumber = ExprNode.TokenNumber;
if (!Parser.NeededToken(TokenNumber, "value", "then", 0))
{
node.BadParsed = true;
node.ErrorLine = Parser.TokensArray[Math.Min(TokenNumber, Parser.TokensArray.Length - 1)].Line;
return(node);
}
TokenNumber++;
List <Node> BodyNodes = BodyParser.parse(TokenNumber);
if (BodyNodes.Count == 0)
{
node.BadParsed = true;
node.ErrorLine = Parser.TokensArray[Math.Min(TokenNumber, Parser.TokensArray.Length - 1)].Line;
return(node);
}
Node LastNode = BodyNodes[BodyNodes.Count - 1];
if (LastNode.BadParsed)
{
node.BadParsed = true;
node.ErrorLine = LastNode.ErrorLine;
return(node);
}
for (int i = 0; i < BodyNodes.Count; ++i)
{
node.AddIfBodyNode(BodyNodes[i]);
}
TokenNumber = LastNode.TokenNumber;
if (Parser.NeededToken(TokenNumber, "value", "else", 0))
{
TokenNumber++;
BodyNodes = BodyParser.parse(TokenNumber);
if (BodyNodes.Count == 0)
{
node.BadParsed = true;
node.ErrorLine = Parser.TokensArray[Math.Min(TokenNumber, Parser.TokensArray.Length - 1)].Line;
return(node);
}
LastNode = BodyNodes[BodyNodes.Count - 1];
if (LastNode.BadParsed)
{
node.BadParsed = true;
node.ErrorLine = LastNode.ErrorLine;
return(node);
}
for (int i = 0; i < BodyNodes.Count; ++i)
{
node.AddElseBodyNode(BodyNodes[i]);
}
TokenNumber = LastNode.TokenNumber;
}
if (!Parser.NeededToken(TokenNumber, "value", "end", 0))
{
node.BadParsed = true;
node.ErrorLine = Parser.TokensArray[Math.Min(TokenNumber, Parser.TokensArray.Length - 1)].Line;
return(node);
}
TokenNumber++;
node.TokenNumber = TokenNumber;
return(node);
}