static void Main(string[] args)
{
string filename = args[0];
string outfile = filename + ".s";
AntlrInputStream ais = new AntlrInputStream(File.Open(filename, FileMode.Open));
ITokenSource lexer = new llangLexer(ais);
ITokenStream tokens = new CommonTokenStream(lexer);
llangParser parser = new llangParser(tokens);
parser.BuildParseTree = true;
IParseTree tree = parser.prog();
ASTBuilder b = new ASTBuilder();
ASTNode root = b.Visit(tree);
TypeMaker tm = new TypeMaker();
tm.Visit(root);
SemanticChecker sc = new SemanticChecker();
int errors = 0;
if ((errors = sc.Check(root)) > 0)
{
Console.WriteLine("{0} Error(s) - Aborting", errors);
Console.ReadKey();
return;
}
(new AstPrinter()).Visit(root);
Interpreter interp = new Interpreter(root);
try
{
interp.Run();
}
catch (Interpreter.ExecutionTerminatedException e)
{
Console.WriteLine($"Execution Terminated by exit({e.ExitCode}) call");
}
//(new MIPSCodeGenerator(outfile)).Visit(root);
//Console.ReadKey();
}
public override object VisitFieldAccessNode(FieldAccessNode n)
{
Visit(n.basestruct);
if (n.basestruct.Type.Kind == TypeSymbol.TypeKind.STRUCT)
{
semanticChecker.CheckAndReport(n.basestruct.Type.Fields.ContainsKey(n.fieldname), n.sourceLoc, $"Undeclared Field {n.fieldname} in {n.basestruct.Type.Name}");
}
else if (n.basestruct.Type.Kind == TypeSymbol.TypeKind.POINTER)
{
var structsymbol = TypeMaker.MakeTypeSymbolForString(n.basestruct.Type.Name);
semanticChecker.CheckAndReport(structsymbol.Fields.ContainsKey(n.fieldname), n.sourceLoc, $"Undeclared Field {n.fieldname} in {structsymbol.Name}");
}
else if (n.basestruct.Type.Kind == TypeSymbol.TypeKind.ENUM)
{
semanticChecker.CheckAndReport(n.basestruct.Type.EnumItems.ContainsKey(n.fieldname), n.sourceLoc, $"Enum {n.basestruct.Type.Name} has no item {n.fieldname}");
}
else
{
semanticChecker.CheckAndReport(n.basestruct.Type.Kind == TypeSymbol.TypeKind.STRUCT, n.sourceLoc, "Struct not typeof struct or pointer");
}
return(null);
}