/// <summary>
/// Run a single read-evaluate-print iteration.
/// </summary>
void RunIteration()
{
// Read user input
BufferedInput = ReadUserInput();
if (string.IsNullOrEmpty(BufferedInput))
{
return;
}
// Compile the module
var module = WrapIodineOperation(this, () => Iodine.CompileSource(BufferedInput));
if (module == null)
{
return;
}
// Invoke the module
var result = WrapIodineOperation(this, () => Iodine.InvokeModule(module));
if (result == null)
{
return;
}
// Pretty print the result
PrettyPrint.WriteLine(result);
}
public static void HandleUnhandledIodineException(Shell instance, Iodine.Runtime.UnhandledIodineExceptionException e)
{
// Pretty print the underlying Iodine exception
PrettyPrint.WriteLine(e.OriginalException);
// Test if the error occurred in an actual module
if (e.Frame.Module.Name != "__anonymous__")
{
// Print the stack trace
e.PrintStack();
}
}
/// <summary>
/// Initializes a new instance of the <see cref="T:iox.Shell"/> class.
/// </summary>
public Shell(Configuration conf)
{
Conf = conf;
// Get assembly version
AssemblyVersion = ReflectionHelper.GetVersion();
// Define builtin exit function
var iodineHookExit = new BuiltinMethodCallback((vm, self, arguments) => {
shouldExit = true;
return(IodineNull.Instance);
}, null);
iodineHookExit.SetAttribute("__doc__", new IodineString("Exits the iox REPL shell."));
// Define builtin help function
var iodineHookHelp = new BuiltinMethodCallback((vm, self, arguments) => {
// Test argument count
if (arguments.Length == 0)
{
ANSI.WriteLine("Please pass an object to the help function!");
return(IodineNull.Instance);
}
// Get the target object
var target = arguments [0];
// Test __doc__ attribute existence
if (!target.HasAttribute("__doc__"))
{
ANSI.WriteLine($"The specified {White}{target.TypeDef.Name}{Default} does not provide any documentation :(");
return(IodineNull.Instance);
}
// Get attribute
var attr = target.GetAttribute(vm, "__doc__");
// Get documentation
var doc = (
attr as IodineString ??
(attr as IodineProperty)?.Get(vm) as IodineString ??
(attr as InternalIodineProperty)?.Get(vm) as IodineString
);
// Write documentation
if (doc != null)
{
PrettyPrint.WriteLine(doc);
}
return(IodineNull.Instance);
}, null);
iodineHookHelp.SetAttribute("__doc__", new IodineString("Prints the documentation for the specified object."));
// Setup Iodine context
Iodine = new IodineContext();
Iodine.ExposeGlobal("exit", iodineHookExit);
Iodine.ExposeGlobal("help", iodineHookHelp);
Iodine.AddSearchPaths("./iodine/modules");
if (Environment.GetEnvironmentVariable("IODINE_MODULES") != null)
{
Iodine.AddSearchPaths(Environment.GetEnvironmentVariable("IODINE_MODULES"));
}
if (Environment.GetEnvironmentVariable("IODINE_HOME") != null)
{
Iodine.AddSearchPaths(Path.Combine(Environment.GetEnvironmentVariable("IODINE_HOME"), "modules"));
}
// Set prompt
Prompt = new Prompt("λ");
if (Conf.UsePowerlines)
{
Prompt = new Prompt(Powerline().Segment($"IoX {AssemblyVersion.ToString (2)} ", fg: DarkCyan, bg: White).ToAnsiString());
}
// Set hinter
Hinter = new HinterWrapper(this);
}