public static void Display(this IInteractivity interactivity, ParseError error, String source)
{
var start = error.Start.Index - 1;
var end = error.End.Index - 1;
var lines = source.Split(new[] { Environment.NewLine }, StringSplitOptions.None);
source = String.Join(" ", lines).Replace('\t', ' ');
if (end == start)
{
end++;
}
var range = 48;
var middle = (end + start) / 2;
var ss = Math.Min(source.Length, Math.Max(middle - range / 2, 0));
var se = Math.Min(Math.Max(0, middle + range / 2), source.Length);
var snippet = source.Substring(ss, se - ss);
interactivity.Error(snippet);
interactivity.Error(Environment.NewLine);
interactivity.Error(new String(' ', Math.Max(0, start - ss)));
interactivity.Error(new String('^', Math.Max(0, end - start)));
interactivity.Error(Environment.NewLine);
interactivity.Display(error);
}
public static void Display(this IInteractivity interactivity, ParseError error)
{
var message = error.Code.GetMessage();
var hint = String.Format("Line {1}, Column {2}: {0}", message, error.Start.Row, error.Start.Column);
interactivity.Error(hint);
}
public void Run(String file)
{
var import = _engine.Globals["import"] as Function;
try
{
import.Invoke(new[] { file });
}
catch (ParseException ex)
{
var content = File.ReadAllText(file);
_interactivity.Display(ex.Error, content);
}
catch (Exception ex)
{
_interactivity.Error(ex.Message);
}
}
public String GetContent(String fileName)
{
var content = String.Empty;
if (!File.Exists(fileName))
{
_interactivity.Error(String.Format("The file {0} does not exist.", fileName));
Environment.Exit(1);
}
try
{
content = File.ReadAllText(fileName);
}
catch
{
_interactivity.Error(String.Format("Error while reading the file {0}.", fileName));
Environment.Exit(1);
}
return(content);
}
private void Evaluate(String content, Boolean showOutput)
{
try
{
var result = _engine.Interpret(content);
if (showOutput)
{
_interactivity.Info(result);
_engine.Scope["ans"] = result;
}
}
catch (ParseException ex)
{
Display(ex.Error, content);
}
catch (Exception ex)
{
_interactivity.Error(ex.Message);
}
_interactivity.Write(Environment.NewLine);
}