private static void RunFile(string filename)
{
if (File.Exists(filename))
{
string fileContents = File.ReadAllText(filename);
Scanner scanner = new Scanner(fileContents);
List <Token> tokens = scanner.ScanTokens();
Parser parser = new Parser(tokens);
List <Stmt> ast = parser.ParseFile();
if (debugMode)
{
AstPrinter astp = new AstPrinter();
foreach (var stmt in ast)
{
Console.WriteLine(astp.Print(stmt));
}
Console.WriteLine();
}
if (hadError)
{
System.Environment.Exit(1);
}
interpreter.Interpret(ast);
if (hadRuntimeError)
{
System.Environment.Exit(2);
}
}
else
{
Console.WriteLine("File \"{0}\" doesn't exist!", filename);
}
}
private static void RunPrompt()
{
if (!debugMode)
{
Console.WriteLine("Feebl v.0.1.");
}
else
{
Console.WriteLine("Feebl v.0.1. AST print mode on.");
}
while (true)
{
hadError = false;
Console.Write("> ");
string source = Console.ReadLine();
Scanner scanner = new Scanner(source);
List <Token> tokens = scanner.ScanTokens();
Parser parser = new Parser(tokens);
object ast = parser.ParseRepl();
if (hadError)
{
continue;
}
if (ast is List <Stmt> )
{
if (hadError)
{
continue;
}
if (debugMode)
{
AstPrinter astp = new AstPrinter();
foreach (var stmt in (ast as List <Stmt>))
{
Console.WriteLine(astp.Print(stmt));
}
}
interpreter.Interpret((List <Stmt>)ast);
}
else if (ast is Expr)
{
if (debugMode)
{
AstPrinter astp = new AstPrinter();
Console.WriteLine(astp.Print(ast as Expr));
}
string result = interpreter.Interpret((Expr)ast);
if (result != null)
{
Console.WriteLine("-> {0}", result);
}
}
}
}