static void Main(string[] args)
{
if (args.Length == 0)
{
Console.WriteLine("Usage: compiler filename [-r]\n\n-r: JIT and run the program immediately");
return;
}
string filename = args[0];
StreamReader sourceFile;
try
{
sourceFile = new StreamReader(filename);
}
catch (Exception)
{
Console.WriteLine("File " + filename + " not found.");
return;
}
SourceReader reader = new SourceReader(sourceFile);
ErrorHandler errors = new ErrorHandler();
Scanner scanner = new Scanner(reader, errors);
Parser parser = new Parser(scanner, errors);
ProgramNode program = parser.Parse();
SemanticAnalyzer analyzer = new SemanticAnalyzer(program, errors);
var symbols = analyzer.Analyze();
if (errors.HasErrors)
{
Console.WriteLine("Given program contains following errors:");
foreach (var error in errors.GetErrors())
{
Console.WriteLine(error);
}
return;
}
else
{
LambdaLifter lifter = new LambdaLifter(program, symbols);
lifter.LiftLambdas();
symbols = analyzer.Analyze();
AssemblyBuilder assembly;
CodeGenerator generator = new CodeGenerator(program, symbols);
try
{
assembly = generator.Generate();
}
catch (Exception e)
{
Console.WriteLine("The compiler encountered an unrecoverable error during compilation:\n{0}", e);
return;
}
Console.WriteLine(string.Format("Compiler program saved to {0}.exe", program.Identifier));
assembly.Save(program.Identifier + ".exe");
if (args.Length > 1 && args[1] == "-r")
{
Console.WriteLine("Program output:");
Type progType = assembly.GetType(program.Identifier);
MethodInfo info = progType.GetMethod("Main");
object o1 = Activator.CreateInstance(progType);
try
{
info.Invoke(null, null);
}
catch (Exception e)
{
Console.WriteLine("The program encountered an unrecoverable runtime error:\n{0}", e);
}
}
}
}
public CodeGenerator(ProgramNode program, SymbolTable symbols)
{
this.program = program;
this.symbols = symbols;
symbols.ResetScope();
}
//private SymbolTable Symbols;
public LambdaLifter(ProgramNode program, SymbolTable symbols)
{
Program = program;
//Symbols = symbols;
}
private void Visit(ProgramNode programNode)
{
FunctionStack.Push(new ProcedureSymbol("_Main", false, false, 1));
Visit(programNode.Block);
}
