static void Main(string[] args)
{
var grammar = new ExampleExpressionGrammar();
var interpriter = new ScriptInterpreter(grammar);
interpriter.Evaluate("circle 4,53 123\ncircle 2,4 12");
if(interpriter.Status != InterpreterStatus.Ready)
{
throw new InvalidOperationException("You syntax errored!?");
}
var program = interpriter.ParsedScript.Root.AstNode as StatementListNode;
foreach (var circle in program.ChildNodes.OfType<CircleDefNode>())
{
Console.WriteLine("I saw a circle at ({0},{1}) with a radius {2}",
circle.Point.X,
circle.Point.Y,
circle.Radius);
}
Console.ReadKey();
}
public IEnumerable<Project> Interpret(string dslText)
{
List<Project> projects = new List<Project>();
var grammar = new ProjectsGrammar();
var interpriter = new ScriptInterpreter(grammar);
interpriter.Evaluate(dslText);
if (interpriter.Status != InterpreterStatus.Ready)
{
throw new InvalidOperationException("Your syntax errored!?");
}
var program = interpriter.ParsedScript.Root.AstNode as StatementListNode;
foreach (var node in program.ChildNodes)
{
if (node.Term.Name == "Project")
{
var projectName = (LiteralValueNode) node.ChildNodes[0];
var project = new Project(projectName.Value.ToString().Trim());
projects.Add(project);
var notes = (StatementListNode) node.ChildNodes[1];
foreach(var note in notes.ChildNodes)
{
project.AddNote(((LiteralValueNode) note).Value.ToString().Trim());
}
var tasks = (StatementListNode)node.ChildNodes[2];
foreach (var child in tasks.ChildNodes)
{
var taskName = (LiteralValueNode)child.ChildNodes[0];
var task = new TaskItem(taskName.Value.ToString());
projects.Last().AddTask(task);
var taskNotes = (StatementListNode)child.ChildNodes[1];
foreach (var note in taskNotes.ChildNodes)
{
task.AddNote(((LiteralValueNode)note).Value.ToString().Trim());
}
}
}
}
return projects;
}
//This method allows custom implementation of running a sample in Grammar Explorer
// By default it evaluates a parse tree using default interpreter
public virtual string RunSample(ParseTree parsedSample)
{
var interpreter = new ScriptInterpreter(this);
interpreter.Evaluate(parsedSample);
return interpreter.GetOutput();
}