public Parser(Tokenizer tokenizer)
{
this.tokenizer = tokenizer;
currToken = this.tokenizer.nextToken();
}
static void Main(string[] args)
{
#region ArgCheck
//var for command-line flags
bool argErr = false;
bool flagInterpret = false;
bool flagCompile = false;
string inputFile;
string input = null;
//Command-line flags check.
if (args.Count() == 0 || args.Count() > 4)
{
argErr = true;
Console.WriteLine("Error on arguments." + (args.Count() == 0 ? "Too few" : "Too many") + " args.\n");
}
else
{
for (int i = 0; i < args.Length; i++)
{
switch (args[i])
{
case "-i":
flagInterpret = true;
break;
case "-c":
flagCompile = true;
break;
case "-f":
if (i + 1 < args.Length)
{
inputFile = args[++i];
try
{
string path = Directory.GetCurrentDirectory();
string filePath = Path.Combine(path, inputFile);
input = System.IO.File.ReadAllText(@inputFile);
}
catch (Exception e)
{
Console.WriteLine("Error on input file: "+ e.Message);
argErr = true;
}
}
else
{
argErr = true;
Console.WriteLine("Error on arguments. Input file name not specified");
}
break;
default:
argErr = true;
Console.WriteLine("Error on arguments. Flag " + args[i] + " not valid");
break;
}
}
}
//I check here so I can list all invalid flag on the switch
if (argErr)
{
Console.WriteLine("\n\nAllowed command-line flag:");
Console.WriteLine("\t -f fileName: use the file with fileName in the current working directory as input.");
Console.WriteLine("\t -i: causes the program to interpret the Boolean expressions to produce the corresponding boolean value on the standard output stream.");
Console.WriteLine("\t -c: causes the program to create a file named \"result.c\" in the current working directory. That file contain C code to perform the computation specified by the input string.");
Console.WriteLine("\n\nPress any key to exit.");
System.Console.ReadKey();
Environment.Exit(1);
}
#endregion
Tokenizer tokenizer = new Tokenizer();
tokenizer.setInput(input);
Parser parser = new Parser(tokenizer);
Console.WriteLine("Input file parsed successfully.");
Node root = parser.parse();
if (flagInterpret)
{
Console.WriteLine("Evaluating:\n\t" + input);
try
{
Console.WriteLine("Result: \t" + root.eval().ToString());
}
catch (Exception e)
{
Console.WriteLine("Error evaluating input file. Evaluation interrupted.\n\t" + e.Message);
Environment.Exit(1);
}
}
if (flagCompile)
{
string path = Directory.GetCurrentDirectory();
string fileName = Path.Combine(path, "result.c");
Compiler compiler = new Compiler(input, root);
string compiledCode = compiler.compile();
try
{
System.IO.File.WriteAllText(fileName, compiledCode);
}
catch (Exception e)
{
Console.WriteLine("Error writing \"result.c\"\n\r" + e.Message);
Environment.Exit(1);
}
Console.WriteLine("Compilation successful.");
}
// Keep the console window open in debug mode.
//Console.WriteLine("Press any key to exit.");
//System.Console.ReadKey();
}