private Continuation(Statistics statistics, IStack<LexicalEnvironment> envs, IStack<Task> tasks, IStack<Datum> results, ErrorHandler errorHandler)
{
this.statistics = statistics;
this.envs = envs;
this.tasks = tasks;
this.results = results;
this.errorHandler = errorHandler;
}
public Datum Evaluate(Statistics statistics, LexicalEnvironment env, Datum datum)
{
env.Statistics = statistics;
var c = Continuation.Create(statistics)
.PushTask(null)
.PushResult(null)
.Evaluate(env, datum);
return Evaluate(c);
}
static void Main(string[] args)
{
try
{
var env = StandardEnvironment.Create();
env.Define("args", DatumHelpers.atomList(args));
var statistics = new Statistics();
env = statistics.AddTo(env);
ResourceLoader.ExecuteResource(statistics, Assembly.GetExecutingAssembly(), env, "Lisp.REPL.lisp");
}
catch (Exception ex)
{
Console.Error.WriteLine("ERROR:\n{0}\n{1}\n", ex, ex.StackTrace);
}
}
private LexicalEnvironment(LexicalEnvironment parent, IStack<Binding> bindings)
{
this.statistics = parent == null ? null : parent.statistics;
this.parent = parent;
this.bindings = bindings;
}
/**
* Used for bootstrapping various .lisp files into the environment.
*/
public static void ExecuteResource(Statistics statistics, Assembly assembly, LexicalEnvironment env, string resourceFile)
{
var evaluator = new Evaluator();
foreach (var d in ReadDatums(assembly, resourceFile))
evaluator.Evaluate(statistics, env, d);
}
public Statistics Delta(Statistics prev)
{
return new Statistics {Steps = Steps - prev.Steps, Expansions = Expansions - prev.Expansions, Lookups = Lookups - prev.Lookups};
}
public Statistics(Statistics s)
{
this.Steps = s.Steps;
this.Expansions = s.Expansions;
this.Lookups = s.Lookups;
}
public static Continuation Create(Statistics s)
{
return new Continuation(s, Stack<LexicalEnvironment>.Empty.Push(null), Stack<Task>.Empty, Stack<Datum>.Empty, Unhandled);
}
private LexicalEnvironment(LexicalEnvironment parent, IStack <Binding> bindings)
{
this.statistics = parent == null ? null : parent.statistics;
this.parent = parent;
this.bindings = bindings;
}