static void Main(string[] args)
{
Console.Title = "MyCompiler - Parser";
var argManager = new ArgManager(args);
bool debug = argManager.Contains("-d");
//debug = true; // cancella questa riga dopo le fasi di test
string sourceFilename = argManager.First();
if(string.IsNullOrEmpty(sourceFilename))
sourceFilename = argManager.Find("-s");
// if DEBUG
if (debug && string.IsNullOrEmpty(sourceFilename))
sourceFilename = "lexoutput.txt";
string outputFilename = argManager.Find("-o");
if (string.IsNullOrEmpty(outputFilename))
outputFilename = "parseoutput.txt";
string bnfFilename = argManager.Find("-b");
if (string.IsNullOrEmpty(bnfFilename))
bnfFilename = "bnf.txt";
string tableFilename = argManager.Find("-t");
// Error
if (!File.Exists(sourceFilename))
{
Console.WriteLine(String.Format("Error, source file: \"{0}\" not found!", sourceFilename));
return;
}
if (!File.Exists(bnfFilename))
{
Console.WriteLine(String.Format("Error, BNF file: \"{0}\" not found!", bnfFilename));
return;
}
// Load BNF
Console.WriteLine("Reading BNF...");
Console.WriteLine(string.Empty);
var grammar = (new BNFParser(bnfFilename)).Parse();
if (grammar == null)
{
Console.WriteLine("Exception: Error parsing BNF file...");
return;
}
File.WriteAllText("grammar.txt", grammar.ToString());
// input's tokens
List<Token> tokens = new List<Token>();
StreamReader rd = new StreamReader(sourceFilename);
while(!rd.EndOfStream)
{
string line = rd.ReadLine();
if (string.IsNullOrEmpty(line))
continue;
try
{
tokens.Add(Token.Parse(line));
}
catch(Exception e)
{
Console.WriteLine("Exception, Error parsing tokens!");
Console.WriteLine(e.ToString());
}
}
rd.Close();
rd.Dispose();
// Check the parsing Table
var parsingTable = new ParsingTable(grammar);
if (!string.IsNullOrEmpty(tableFilename))
{
File.WriteAllText(tableFilename, parsingTable.ToString());
}
Console.WriteLine(string.Empty);
if (parsingTable.LeftFactored == false)
{
Console.WriteLine("Warning: The current grammar is not left-factored!");
Console.WriteLine(string.Empty);
}
// Parsing
var parser = new FrontEnd.Parser(grammar);
var parseTree = parser.Parse(tokens);
if (parseTree == null)
{
Console.WriteLine(parser.Error);
File.WriteAllText(outputFilename, parser.Error);
}
else
{
Console.WriteLine("ParseTree:");
Console.WriteLine(string.Empty);
Console.WriteLine(parseTree.ToString());
File.WriteAllText(outputFilename, parseTree.ToXML());
Console.WriteLine(string.Empty);
Console.WriteLine("Result: parsing done!");
}
if (debug)
Console.ReadKey();
}
protected void SetUp()
{
_scanner = new Scanner();
_parser = new Parser();
}