static string PrintNodeWithChildren(SyntaxAnalizer.ExpressionNode node, string indentation)
{
if (node == null)
{
return("");
}
SyntaxAnalizer.ValidateNode(node);
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.AppendLine($"{indentation} {node.Operator.Value}");
if (node.Left != null)
{
stringBuilder.Append(PrintNodeWithChildren(node.Left, indentation + "\\"));
}
if (node.Right != null)
{
stringBuilder.Append(PrintNodeWithChildren(node.Right, indentation + "\\"));
}
return(stringBuilder.ToString());
}
static void DoTheJob(IEnumerable <string> codeLines)
{
Dictionary <string, Token> constants = new Dictionary <string, Token>();
Dictionary <string, Token> variables = new Dictionary <string, Token>();
Dictionary <string, Token> operators = new Dictionary <string, Token>();
Dictionary <string, Token> keywords = new Dictionary <string, Token>();
List <LexicalError> errors = new List <LexicalError>();
// running lexical analysis
TreeList <SyntaxAnalizer.ExpressionNode> tree = new TreeList <SyntaxAnalizer.ExpressionNode>(null);
TreeList <SyntaxAnalizer.ExpressionNode> currentBlock = tree;
int lineNumber = 0;
SyntaxAnalizer sa = new SyntaxAnalizer();
LexicalAnalizer la = new LexicalAnalizer();
int previousLineIndentation = 0;
foreach (string line in codeLines)
{
Construction construction = la.AnaliseLine(line, lineNumber);
if (construction.Tokens.Count == 0)
{
lineNumber++;
continue;
}
for (int i = 0; i < construction.Tokens.Count; i++)
{
Token token = construction.Tokens[i];
if (token.IsReservedIdToken)
{
keywords.TryAdd(token.Value, token);
}
else if (token.IsOperation)
{
operators.TryAdd(token.Value, token);
}
else if (token.IsConstant)
{
constants.TryAdd(token.Value, token);
}
else if (token.TokenType != TokenTypes.UNKNOWN)
{
variables.TryAdd(token.Value, token);
}
}
if (construction.HasErrors)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("\t\t ERRORS");
Console.ResetColor();
foreach (LexicalError error in construction.Errors)
{
Console.WriteLine($"line {error.CodeLineNumber + 1} char {error.IndexInCodeLine + 1} :: {error.ErrorType}");
Console.WriteLine(error.Description);
}
Console.Read();
Environment.Exit(1);
}
SyntaxAnalizer.ExpressionNode node = null;
bool isElifElseNode = false;
bool newBlockToOpen = false;
node = sa.Analyse(construction.Tokens, out newBlockToOpen, out isElifElseNode);
int indentationDiff = previousLineIndentation - construction.Indentation;
if (indentationDiff > 0)
{
for (int i = previousLineIndentation - 1; i >= construction.Indentation; i--)
{
currentBlock = currentBlock.Parent;
if (currentBlock.Indentation == i)
{
break;
}
}
// currentBlock = currentBlock.Parent; // TODO: create parent relationship between BLOCKS to support >1 level nesting
if (node.Operator.IsElif && !currentBlock.Last().Operator.IsIf)
{
throw new SyntaxAnalizer.SyntaxErrorException(
"elif block not allowed here",
node.Operator.Value,
node.Operator.CodeLineIndex,
node.Operator.CodeLineNumber
);
}
else if (node.Operator.IsElse && !(currentBlock.Last().Operator.IsIf || currentBlock.Last().Operator.IsElif))
{
throw new SyntaxAnalizer.SyntaxErrorException(
"else block not allowed here",
line,
node.Operator.CodeLineIndex,
node.Operator.CodeLineNumber
);
}
}
previousLineIndentation = construction.Indentation;
lineNumber++;
if (newBlockToOpen)
{
if ((node.Operator.IsElif || node.Operator.IsElse) && !currentBlock.Last().Operator.IsIf&& !currentBlock.Last().Operator.IsElif)
{
throw new SyntaxAnalizer.SyntaxErrorException(
"lacks IF clause for elif|else block to appear",
node.Operator.Value,
node.Operator.CodeLineIndex,
node.Operator.CodeLineNumber
);
}
currentBlock.Add(node);
currentBlock.Last().Block = new TreeList <SyntaxAnalizer.ExpressionNode>(currentBlock);
currentBlock = currentBlock.Last().Block;
currentBlock.Indentation = construction.Indentation;
continue;
}
currentBlock.Add(node);
}
if (errors.Any())
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("\t\t ERRORS");
Console.ResetColor();
foreach (LexicalError error in errors)
{
Console.WriteLine($"line {error.CodeLineNumber + 1} char {error.IndexInCodeLine + 1} :: {error.ErrorType}");
Console.WriteLine(error.Description);
}
}
Console.WriteLine("SYNTAX TREE:\n");
PrintSyntaxTree(tree);
// console tables output block
Console.WriteLine("\n \t\t CONSTANTS");
PrintTokensDictionary(constants);
Console.WriteLine("\n \t\t VARIABLES");
PrintTokensDictionary(variables);
Console.WriteLine("\n \t\t KEYWORS");
PrintTokensDictionary(keywords);
Console.WriteLine("\n \t\t OPERATORS");
PrintTokensDictionary(operators);
}