public KOperative(KObject formals, KObject eformal, KObject expr, KEnvironment env)
{
Formals = formals;
EFormal = eformal;
Expr = expr;
if (!(eformal is KIgnore || eformal is KSymbol))
{
throw new RuntimeException("Can't construct operative, type mismatch of eformal");
}
var lst = CheckFormalTree(Formals);
if (eformal is KSymbol)
{
KSymbol s = eformal as KSymbol;
if (lst.Contains(s.Value))
{
throw new RuntimeException("Distinct eformal needed");
}
}
if (!(env is KEnvironment))
{
throw new RuntimeException("Operative: not an environment!");
}
else
{
staticenv = env;
}
}
public static void BindFormalTree(KObject formal, KObject vals, KEnvironment env, KObject ctxt = null)
{
if (ctxt == null)
{
ctxt = formal;
}
if (formal is KSymbol)
{
env.Bind(((KSymbol)formal).Value, vals);
}
else if (formal is KIgnore)
{
return;
}
else if (formal is KNil && vals is KNil)
{
return;
}
else if (formal is KPair && vals is KPair)
{
KPair f = formal as KPair;
KPair v = vals as KPair;
BindFormalTree(f.Car, v.Car, env, ctxt);
BindFormalTree(f.Cdr, v.Cdr, env, ctxt);
}
else
{
throw new RuntimeException("Can't bind formal tree of " + ctxt.Write());
}
}
public override RecursionResult <KObject> Combine(KObject args, KEnvironment env, Continuation <KObject> cont)
{
var res = CheckParameter(args, 3, "guard-continuation");
if (res != null)
{
return(CPS.Error(res, cont));
}
KContinuation c = Second(args) as KContinuation;
KObject entry = First(args);
KObject exit = Third(args);
try
{
if (null == c)
{
throw new RuntimeException("guard-continuation: not a continution");
}
c.Value.EntryGuard = assignGuards(entry);
c.Value.ExitGuard = assignGuards(exit);
return(CPS.Return(c, cont));
}
catch (Exception e)
{
return(CPS.Error(e.Message, cont));
}
}
public override RecursionResult <KObject> Combine(KObject args, KEnvironment env, Continuation <KObject> cont)
{
var res = CheckParameter(args, 1, "load");
if (res != null)
{
return(CPS.Error(res, cont));
}
KObject val = First(args) as KString;
if (!(val is KString))
{
return(CPS.Error("load: not a string", cont));
}
string path = (val as KString).Value;
try
{
List <KObject> tokens = Parser.ParseAll(File.ReadAllText(path));
foreach (var token in tokens)
{
Evaluator.Eval(token, env);
}
return(CPS.Return(new KInert(), cont));
}
catch (Exception e)
{
return(CPS.Error("Failed to load file: " + e.Message, cont));
}
}
public override object Do(KObject args, KEnvironment env, Continuation <KObject> cont)
{
CPara(args, 3);
KObject formalt = First(args), eformal = Second(args), expr = Third(args);
return(new KOperative(formalt, eformal, expr, env));
}
public virtual RecursionResult <KObject> Combine(KObject args, KEnvironment env, Continuation <KObject> cont)
{
object result = null;
try {
result = Do(args, env, cont);
} catch (RuntimeException e) {
return(CPS.Error <KObject>(getName() + ": " + e.Message, cont));
}
if (result is KObject)
{
return(CPS.Return(result as KObject, cont));
}
else if (result is bool)
{
return(CPS.Return(new KBoolean((bool)result), cont));
}
else if (result is RecursionResult <KObject> )
{
return(result as RecursionResult <KObject>);
}
else
{
return(CPS.Return(new KInert(), cont));
}
}
public override object Do(KObject args, KEnvironment env, Continuation <KObject> cont)
{
CPara(args, 1);
KFraction input = First(args) as KFraction;
Check(input);
return(new KDouble(input.ToDouble()));
}
public override object Do(KObject args, KEnvironment env, Continuation <KObject> cont)
{
CPara(args, 1);
var inex = First(args) as KDouble;
Check(inex);
return(KFraction.fromDouble(inex.Value));
}
public override object Do(KObject args, KEnvironment env, Continuation <KObject> cont)
{
CPara(args, 1);
KContinuation c = First(args) as KContinuation;
Check(c, "expected continuation");
return(new KApplicative(new PPassCont(c)));
}
public override object Do(KObject args, KEnvironment env, Continuation <KObject> cont)
{
CPara(args, 1);
KCombiner comb = First(args) as KCombiner;
Check(comb, "not a combiner");
return(Evaluator.rceval(new KPair(comb, new KPair(new KContinuation(cont), new KNil())), env, cont));
}
public override object Do(KObject args, KEnvironment env, Continuation <KObject> cont)
{
CPara(args, 1);
KCombiner op = First(args) as KCombiner;
Check(op, "not a combiner");
return(new KApplicative(op));
}
public override object Do(KObject args, KEnvironment env, Continuation <KObject> cont)
{
CPara(args, 2);
KObject a = First(args);
KObject b = Second(args);
return(CompareEqual(a, b));
}
public override object Do(KObject args, KEnvironment env, Continuation <KObject> cont)
{
CPara(args, 2);
KObject expr = First(args);
KEnvironment envir = Second(args) as KEnvironment;
Check(envir, "not an enviroment");
return(CPS.PassTo <KObject>(() => Evaluator.rceval(expr, envir, cont)));
}
public override RecursionResult <KObject> Combine(KObject args, KEnvironment env, Continuation <KObject> cont)
{
var res = CheckParameter(args, 1, "copy-es-immutable");
if (res != null)
{
return(CPS.Error(res, cont));
}
return(Return(KPair.CopyEs(First(args)), cont));
}
public override RecursionResult <KObject> Combine(KObject args, KEnvironment env, Continuation <KObject> cont)
{
var res = CheckParameter(args, 1, "number?");
if (res != null)
{
return(CPS.Error(res, cont));
}
return(ReturnBool(First(args) is KDouble || First(args) is KInteger, cont));
}
public override object Do(KObject args, KEnvironment env, Continuation <KObject> cont)
{
CPara(args, 1);
Continuation <KObject> result = myc.Value;
if (result.Context == null)
{
return(CPS.Return(First(args), CPS.RootContinuation <KObject>()));
}
return(result.Call(First(args)));
}
private static void init()
{
if (initialized)
{
return;
}
GroundEnv = new KEnvironment(null);
env = new KEnvironment(GroundEnv);
loadedModules = new List <string>();
initialized = true;
}
public override object Do(KObject args, KEnvironment env, Continuation <KObject> cont)
{
CPara(args, 0);
KObject datum = null;
while (null == datum)
{
datum = Interpreter.readDatum();
}
return(datum);
}
public override RecursionResult <KObject> Combine(KObject args, KEnvironment env, Continuation <KObject> cont)
{
var res = CheckParameter(args, 1, "encapsulate");
if (res != null)
{
return(CPS.Error(res, cont));
}
KObject datum = First(args);
return(Return(new KEncapsulation(id, datum), cont));
}
public override object Do(KObject args, KEnvironment env, Continuation <KObject> cont)
{
CPara(args, 1);
KEncapsulation datum = First(args) as KEncapsulation;
Check(datum, "not an encap");
if (datum.Id != id)
{
throw new RuntimeException("wrong id");
}
return(datum.Value);
}
public override object Do(KObject args, KEnvironment env, Continuation <KObject> cont)
{
CPara(args, 2);
KPair p = args as KPair;
Continuation <KObject> c = null;
c = new Continuation <KObject>((x) => {
return(CPS.PassTo(() => Evaluator.rceval(
new KPair(p.Car, new KPair(new KString(c.Context.ToString()), new KNil())), env, cont)));
}, cont, "error-handler");
c.isHandler = true;
return(CPS.PassTo(() => Evaluator.rceval(Second(p), env, c)));
}
public override object Do(KObject args, KEnvironment env, Continuation <KObject> cont)
{
CPara(args, 0);
this.id = counter++;
KApplicative e = new KApplicative(new PEncapE(id));
KApplicative p = new KApplicative(new PEncapP(id));
KApplicative d = new KApplicative(new PEncapD(id));
KPair p3 = new KPair(d, new KNil());
KPair p2 = new KPair(p, p3);
KPair p1 = new KPair(e, p2);
return(p1);
}
public override RecursionResult <KObject> Combine(KObject args, KEnvironment env, Continuation <KObject> cont)
{
var res = CheckParameter(args, 1, "display");
if (res != null)
{
return(CPS.Error(res, cont));
}
KObject datum = First(args);
Console.WriteLine(datum.Display());
return(Return(new KInert(), cont));
}
public override object Do(KObject args, KEnvironment env, Continuation <KObject> cont)
{
CPara(args, 2);
KObject definand = First(args), expr = Second(args);
var cc = new Continuation <KObject>((e) => {
try {
Evaluator.BindFormalTree(definand, e, env);
} catch (Exception ex) {
return(CPS.Error <KObject>(ex.Message, cont));
}
return(CPS.Return <KObject>(new KInert(), cont));
}, cont, "define");
return(CPS.PassTo(() => Evaluator.rceval(expr, env, cc)));
}
public override RecursionResult <KObject> Combine(KObject args, KEnvironment env, Continuation <KObject> cont)
{
var res = CheckParameter(args, 1, "continuation->applicative");
if (res != null)
{
return(CPS.Error(res, cont));
}
KObject c = First(args);
if (c is KContinuation)
{
return(CPS.Return(new KApplicative(new PPassCont(c as KContinuation)), cont));
}
return(CPS.Error("continuation->applicative: not a continuation given", cont));
}
public override object Do(KObject args, KEnvironment env, Continuation <KObject> cont)
{
int length = KPair.Length(args);
if (length == -1)
{
throw new RuntimeException("improper list");
}
if (length == 0)
{
throw new RuntimeException("at least one arg expected");
}
else if (length == 1)
{
KObject a = NumbersModule.Check(First(args));
if (a is KFraction)
{
return(new KFraction((a as KFraction).Numerator * -1, (a as KFraction).Denominator));
}
else
{
return(new KDouble((a as KDouble).Value * -1));
}
}
else
{
KObject dif = NumbersModule.Check(First(args));
KObject head = (args as KPair).Cdr;
while (head is KPair)
{
KObject nextNumber = NumbersModule.Check(First(head));
if (dif is KFraction && nextNumber is KFraction)
{
dif = (dif as KFraction).Subtract(nextNumber as KFraction);
}
else
{
KDouble a = NumbersModule.ToInexact(dif);
KDouble b = NumbersModule.ToInexact(nextNumber);
dif = new KDouble(a.Value - b.Value);
}
head = (head as KPair).Cdr;
}
return(dif);
}
}
public override RecursionResult <KObject> Combine(KObject args, KEnvironment env, Continuation <KObject> cont)
{
var res = CheckParameter(args, 2, "*");
if (res != null)
{
return(CPS.Error(res, cont));
}
KObject a = First(args), b = Second(args);
var result = KNumber.DoMath(a, b, (x, y) => x * y, (x, y) => x * y);
if (result == null)
{
return(CPS.Error("*: wrong types", cont));
}
return(Return(result, cont));
}
public override RecursionResult <KObject> Combine(KObject args, KEnvironment env, Continuation <KObject> cont)
{
var res = CheckParameter(args, 0, "make-encapsulation-type");
if (res != null)
{
return(CPS.Error(res, cont));
}
this.id = counter++;
KApplicative e = new KApplicative(new PEncapE(id));
KApplicative p = new KApplicative(new PEncapP(id));
KApplicative d = new KApplicative(new PEncapD(id));
KPair p3 = new KPair(d, new KNil(), true);
KPair p2 = new KPair(p, p3, true);
KPair p1 = new KPair(e, p2, true);
return(Return(p1, cont));
}
public override RecursionResult <KObject> Combine(KObject args, KEnvironment env, Continuation <KObject> cont)
{
var res = CheckParameter(args, 1, "unwrap");
if (res != null)
{
return(CPS.Error(res, cont));
}
KObject ap = First(args);
if (!(ap is KApplicative))
{
return(CPS.Error("unwrap: not an applicative", cont));
}
else
{
return(Return((ap as KApplicative).Combiner, cont));
}
}
public override RecursionResult <KObject> Combine(KObject args, KEnvironment env, Continuation <KObject> cont)
{
var res = CheckParameter(args, 1, "wrap");
if (res != null)
{
return(CPS.Error(res, cont));
}
KObject op = First(args);
if (!(op is KOperative || op is KApplicative))
{
return(CPS.Error("wrap: not a operative", cont));
}
else
{
return(Return(new KApplicative(op as KCombiner), cont));
}
}