/// <summary>
/// Initializes a new instance of the Lambda class.
/// </summary>
/// <param name="formalParameters">A list of variable names, to be matched with
/// values given later.</param>
/// <param name="body">The program to execute.</param>
/// <param name="env">The environment in which to execute it.</param>
protected Lambda(SchemeObject formalParameters, SchemeObject body, Environment env)
: base(null, new ArgsInfo(CountFormals(formalParameters)))
{
this.formalParameters = formalParameters;
this.env = env;
this.body = body;
}
/// <summary>
/// Create a list evaluator.
/// </summary>
/// <param name="expr">The expression to evaluate.</param>
/// <param name="env">The environment to make the expression in.</param>
/// <param name="caller">The caller. Return to this when done.</param>
/// <returns>A list evaluator.</returns>
internal static Evaluator Call(SchemeObject expr, Environment env, Evaluator caller)
{
// first check for degenerate cases
if (expr is EmptyList)
{
caller.ReturnedExpr = EmptyList.Instance;
return caller;
}
if (!(expr is Pair))
{
ErrorHandlers.SemanticError("Bad args for list: " + expr, null);
}
if (AllEvaluated(expr))
{
// Skip creating an evaluator or a list if all elements are constants.
caller.ReturnedExpr = expr;
return caller;
}
if (AllSimple(expr))
{
// Skip creating an evaluator if all elements are constants or symbols.
caller.ReturnedExpr = EvaluateSymbolsInList(expr, env);
return caller;
}
// Something actually needs to be evaluated.
return new EvaluateList(expr, env, caller);
}
public ShipModule TransformScheme(SchemeObject scheme)
{
ModuleDropper.ModuleDropParams dropParams = new ModuleDropper.ModuleDropParams(this.resources, scheme.ModuleId, scheme.Level, Difficulty.none, scheme.CraftMaterials, scheme.Color, scheme.SetID);
ModuleDropper dropper = new ModuleDropper(dropParams);
return((ShipModule)dropper.Drop());
}
/// <summary>
/// Call letrec evaluator.
/// </summary>
/// <param name="expr">The expression to evaluate.</param>
/// <param name="env">The environment to make the expression in.</param>
/// <param name="caller">The caller. Return to this when done.</param>
/// <returns>The let evaluator.</returns>
internal static Evaluator Call(SchemeObject expr, Environment env, Evaluator caller)
{
if (expr is EmptyList)
{
ErrorHandlers.SemanticError("No arguments for letrec", null);
}
if (!(expr is Pair))
{
ErrorHandlers.SemanticError("Bad arg list for letrec: " + expr, null);
}
SchemeObject body = Rest(expr);
if (body is EmptyList)
{
caller.ReturnedExpr = Undefined.Instance;
return caller;
}
SchemeObject bindings = First(expr);
//// In the bindings, the variables are first, the values are second, and anything left over is discarded.
//// If either is missing, an empty list is used instead.
//// To start with, bindings are undefined.
SchemeObject formals = MapFun(First, bindings);
SchemeObject inits = MapFun(Second, bindings);
SchemeObject initVals = Fill(ListLength(formals), Undefined.Instance);
return new EvaluateLetRec(expr, new Environment(formals, initVals, env), caller, body, formals, inits);
}
/// <summary>
/// Call let* evaluator.
/// </summary>
/// <param name="expr">The expression to evaluate.</param>
/// <param name="env">The environment to make the expression in.</param>
/// <param name="caller">The caller. Return to this when done.</param>
/// <returns>The let evaluator.</returns>
internal static Evaluator Call(SchemeObject expr, Environment env, Evaluator caller)
{
if (expr is EmptyList)
{
ErrorHandlers.SemanticError("No arguments arguments for let*", null);
}
if (!(expr is Pair))
{
ErrorHandlers.SemanticError("Bad arg list for let*: " + expr, null);
}
SchemeObject bindings = First(expr);
SchemeObject body = Rest(expr);
if (body is EmptyList)
{
caller.ReturnedExpr = Undefined.Instance;
return caller;
}
SchemeObject vars = MapFun(First, bindings);
SchemeObject inits = MapFun(Second, bindings);
SchemeObject formals = EmptyList.Instance;
SchemeObject vals = EmptyList.Instance;
return new EvaluateLetStar(expr, env, caller, body, vars, inits, formals, vals);
}
/// <summary>
/// Initializes a new instance of the EvaluateList class.
/// This is used in the "list" primitive, and ALSO to evaluate the
/// arguments in a list that is part of procedure application.
/// Because it is used internally, the evaluator must not use destructive
/// operations on its member variables.
/// </summary>
/// <param name="expr">The expression to evaluate.</param>
/// <param name="env">The evaluation environment</param>
/// <param name="caller">The caller. Return to this when done.</param>
private EvaluateList(SchemeObject expr, Environment env, Evaluator caller)
: base(EvalExprStep, expr, env, caller)
{
// Start with an empty list. As exprs are evaluated, they will be consed on the
// front. The list will be reversed before it is returned. Because this is done
// destructively, cloning needs to copy the result.
this.result = EmptyList.Instance;
}
/// <summary>
/// Initializes a new instance of the EvaluateLet class.
/// </summary>
/// <param name="expr">The expression to evaluate.</param>
/// <param name="env">The evaluation environment</param>
/// <param name="caller">The caller. Return to this when done.</param>
/// <param name="name">The name of a named let.</param>
/// <param name="body">The let body.</param>
/// <param name="vars">The variables to bind.</param>
/// <param name="inits">The initial values of the variables.</param>
private EvaluateLet(SchemeObject expr, Environment env, Evaluator caller, Symbol name, SchemeObject body, SchemeObject vars, SchemeObject inits)
: base(InitialStep, expr, env, caller)
{
this.name = name;
this.body = body;
this.vars = vars;
this.inits = inits;
}
/// <summary>
/// Initializes a new instance of the EvaluateLetStar class.
/// </summary>
/// <param name="expr">The expression to evaluate.</param>
/// <param name="env">The evaluation environment</param>
/// <param name="caller">The caller. Return to this when done.</param>
/// <param name="body">The let* body.</param>
/// <param name="vars">The list of variables to bind.</param>
/// <param name="inits">The initialization expressions.</param>
/// <param name="formals">The list of parameters to pass to the lambda.</param>
/// <param name="vals">Evaluated values of inits.</param>
private EvaluateLetStar(SchemeObject expr, Environment env, Evaluator caller, SchemeObject body, SchemeObject vars, SchemeObject inits, SchemeObject formals, SchemeObject vals)
: base(EvalInitStep, expr, env, caller)
{
this.body = body;
this.vars = vars;
this.inits = inits;
this.formals = formals;
this.vals = vals;
}
/// <summary>
/// Initializes a new instance of the EvaluateLetRec class.
/// </summary>
/// <param name="expr">The expression to evaluate.</param>
/// <param name="env">The evaluation environment</param>
/// <param name="caller">The caller. Return to this when done.</param>
/// <param name="body">The let body.</param>
/// <param name="vars">The variables to be bound.</param>
/// <param name="inits">The initialization expressions.</param>
private EvaluateLetRec(SchemeObject expr, Environment env, Evaluator caller, SchemeObject body, SchemeObject vars, SchemeObject inits)
: base(EvalInitStep, expr, env, caller)
{
this.body = body;
this.vars = vars;
this.inits = inits;
this.formals = vars;
this.vals = EmptyList.Instance;
}
/// <summary>
/// Initializes a new instance of the EvaluateDo class.
/// </summary>
/// <param name="expr">The expression to evaluate.</param>
/// <param name="env">The evaluation environment</param>
/// <param name="caller">The caller. Return to this when done.</param>
/// <param name="vars">The variables.</param>
/// <param name="inits">The initialization expressions.</param>
/// <param name="steps">The steps.</param>
/// <param name="exprs">The expressions.</param>
/// <param name="commands">The commands.</param>
/// <param name="testProc">The test proc to execute each interation.</param>
private EvaluateDo(SchemeObject expr, Environment env, Evaluator caller, SchemeObject vars, SchemeObject inits, SchemeObject steps, SchemeObject exprs, SchemeObject commands, Lambda testProc)
: base(InitialStep, expr, new Environment(env), caller)
{
this.vars = vars;
this.inits = inits;
this.steps = steps;
this.exprs = exprs;
this.commands = commands;
this.testProc = testProc;
}
/// <summary>
/// Calls an or evaluator.
/// </summary>
/// <param name="expr">The expression to evaluate.</param>
/// <param name="env">The environment to make the expression in.</param>
/// <param name="caller">The caller. Return to this when done.</param>
/// <returns>The or evaluator.</returns>
internal static Evaluator Call(SchemeObject expr, Environment env, Evaluator caller)
{
// If no expr, avoid creating an evaluator.
if (expr is EmptyList)
{
caller.ReturnedExpr = (SchemeBoolean)false;
return caller;
}
return new EvaluateOr(expr, env, caller);
}
/// <summary>
/// Calls a set evaluator.
/// </summary>
/// <param name="expr">The expression to evaluate.</param>
/// <param name="env">The environment to evaluate the expression in.</param>
/// <param name="caller">The caller. Return to this when done.</param>
/// <returns>The set evaluator.</returns>
internal static Evaluator Call(SchemeObject expr, Environment env, Evaluator caller)
{
SchemeObject lhs = First(expr);
SchemeObject rhs = Second(expr);
if (!(lhs is Symbol))
{
ErrorHandlers.SemanticError(string.Format(@"Set: first argument must be a symbol. Got: ""{0}""", lhs), null);
}
return new EvaluateSet(expr, env, caller, lhs, rhs);
}
private void AddStartItemToInventory()
{
Workshop workshop = (Workshop)(byte)(int)nebulaObject.Tag((byte)PlayerTags.Workshop);
SchemeDropper schemeDropper = new SchemeDropper(workshop, 1, resource, ObjectColor.white);
MaterialObject material = new MaterialObject("CraftOre0001", workshop, 1, resource.Materials.Ore("CraftOre0001"));
SchemeObject scheme = schemeDropper.Drop() as SchemeObject;
scheme.ReplaceCraftingMaterials(new Dictionary <string, int> {
{ "CraftOre0001", 1 }
});
Inventory.Add(scheme, 1);
Inventory.Add(material, 5);
log.InfoFormat("adding tutorial crafting materials at start yellow");
}
private ServerInventoryItem GiveSchemeReward(MmoActor player, ContractSchemeDataReward schemeReward)
{
Workshop workshop = (Workshop)player.GetComponent <CharacterObject>().workshop;
SchemeObject scheme = new SchemeObject(new SchemeObject.SchemeInitData(
Guid.NewGuid().ToString(),
string.Empty,
player.GetComponent <CharacterObject>().level,
workshop,
player.resource.ModuleTemplates.RandomModule(workshop).Id,
schemeReward.color,
new Dictionary <string, int>(),
string.Empty)
);
return(new ServerInventoryItem(scheme, 1));
}
/// <summary>
/// Call the map evaluator
/// </summary>
/// <param name="proc">The map proc.</param>
/// <param name="expr">The map list to traverse.</param>
/// <param name="returnResult">If true, return the result of the map.</param>
/// <param name="env">The environment to make the expression in.</param>
/// <param name="caller">The caller -- return to this when done.</param>
/// <returns>The evaluator to execute.</returns>
internal static Evaluator Call(Procedure proc, SchemeObject expr, bool returnResult, Environment env, Evaluator caller)
{
// first check for degenerate cases
if (expr is EmptyList)
{
caller.ReturnedExpr = EmptyList.Instance;
return caller;
}
if (!(expr is Pair))
{
ErrorHandlers.SemanticError("Bad args for map: " + expr, null);
}
SchemeObject result = returnResult ? EmptyList.Instance : null;
return new EvaluateMap(expr, env, caller, proc, result);
}
private void UpdateDropList()
{
content.Clear();
switch (dropList)
{
case DropList.RandomSchemeOfWorldLevel:
{
SchemeDropper dropper = new SchemeDropper(
CommonUtils.GetRandomEnumValue <Workshop>(new List <Workshop>()),
(nebulaObject.world as MmoWorld).Zone.Level,
nebulaObject.resource);
SchemeObject scheme = dropper.Drop() as SchemeObject;
AddContent(new ServerInventoryItem(scheme, 1));
}
break;
}
}
/// <summary>
/// Call a define evaluator.
/// Handle the two forms of define.
/// In the first case, just save the lambda and return.
/// This is what would result if we prepend "lambda" and call EvaluateExpression.
/// In the second case, we need create an evaluator to evaluate the expression.
/// </summary>
/// <param name="expr">The expression to evaluate.</param>
/// <param name="env">The environment to make the expression in.</param>
/// <param name="caller">The caller. Return to this when done.</param>
/// <returns>The define evaluator.</returns>
internal static Evaluator Call(SchemeObject expr, Environment env, Evaluator caller)
{
if (First(expr) is Pair)
{
// Defun case -- create a lambda and bind it to the variable.
var symbol = First(First(expr));
if (!(symbol is Symbol))
{
ErrorHandlers.SemanticError(string.Format(@"Attempt to define a non-symbol: ""{0}""", symbol.ToString(true)), null);
}
env.Define((Symbol)symbol, Lambda.New(Rest(First(expr)), Rest(expr), env));
caller.ReturnedExpr = Undefined.Instance;
return caller;
}
return new EvaluateDefine(expr, env, caller);
}
/// <summary>
/// Call let evaluator.
/// Start by checking the number of arguments.
/// Then test for named let.
/// Grab bindings, body, and optionally name.
/// </summary>
/// <param name="expr">The expression to evaluate.</param>
/// <param name="env">The environment to make the expression in.</param>
/// <param name="caller">The caller. Return to this when done.</param>
/// <returns>The let evaluator.</returns>
internal static Evaluator Call(SchemeObject expr, Environment env, Evaluator caller)
{
if (expr is EmptyList)
{
ErrorHandlers.SemanticError("No arguments for let", null);
caller.ReturnedExpr = Undefined.Instance;
return caller;
}
if (!(expr is Pair))
{
ErrorHandlers.SemanticError("Bad arg list for let: " + expr, null);
caller.ReturnedExpr = Undefined.Instance;
return caller;
}
Symbol name = null;
SchemeObject bindings;
SchemeObject body;
if (First(expr) is Symbol)
{
// named let
name = (Symbol)First(expr);
bindings = Second(expr);
body = Rest(Rest(expr));
}
else
{
bindings = First(expr);
body = Rest(expr);
}
if (body is EmptyList)
{
caller.ReturnedExpr = Undefined.Instance;
return caller;
}
SchemeObject vars = MapFun(First, bindings);
SchemeObject inits = MapFun(Second, bindings);
return new EvaluateLet(expr, env, caller, name, body, vars, inits);
}
private void CheckComplete()
{
if (pirates.Count > 0)
{
if (allIsDead)
{
log.InfoFormat("Activator complete create chest".Yellow());
pirates.Clear();
SchemeDropper dropper = new SchemeDropper(CommonUtils.GetRandomEnumValue <Workshop>(new List <Workshop>()), 1, nebulaObject.resource, ObjectColor.orange);
SchemeObject scheme = dropper.Drop() as SchemeObject;
ConcurrentBag <ServerInventoryItem> dropList = new ConcurrentBag <ServerInventoryItem> {
new ServerInventoryItem(scheme, 1)
};
var obj = ObjectCreate.SharedChest((nebulaObject.world as MmoWorld), transform.position + Rand.UnitVector3() * 4, 5 * 60, dropList);
obj.AddToWorld();
SetCooldownTimer(cooldown);
SetInteractable(false);
}
}
}
/// <summary>
/// Initializes a new instance of the EvaluateMap class.
/// This is used in the "map" primitive, and as part of "for-each".
/// Because it is used internally, the evaluator must not use destructive
/// operations on its member variables.
/// </summary>
/// <param name="expr">The expression to evaluate.</param>
/// <param name="env">The evaluation environment</param>
/// <param name="caller">The caller. Return to this when done.</param>
/// <param name="proc">The proc to apply to each element of the list.</param>
/// <param name="result">Accumulate the result here, if not null.</param>
private EvaluateMap(SchemeObject expr, Environment env, Evaluator caller, Procedure proc, SchemeObject result)
: base(ApplyFunStep, expr, env, caller)
{
this.proc = proc;
this.result = result;
}
/// <summary>
/// Check the number of args passed.
/// </summary>
/// <param name="numArgs">The number of arguments expected.</param>
/// <param name="args">The arguments passed to the procedure.</param>
/// <param name="evaluatorName">Name, for the error message.</param>
/// <param name="caller">The calling evaluator</param>
protected void CheckArgCount(int numArgs, SchemeObject args, string evaluatorName, Evaluator caller)
{
if (numArgs < this.minArgs || numArgs > this.maxArgs)
{
this.ArgCountError(numArgs, minArgs, args, evaluatorName, caller);
}
}
/// <summary>
/// Generate an error when the argument count check fails.
/// This is also called by CLR procedures, which check their arguments differently.
/// </summary>
/// <param name="numArgs">The actual number of arguments.</param>
/// <param name="expectedArgs">The expected number of arguments.</param>
/// <param name="args">The arguments actually passed.</param>
/// <param name="evaluatorName">The name of the evaluator that is checking the count.</param>
/// <param name="caller">The calling evaluator.</param>
protected void ArgCountError(int numArgs, int expectedArgs, SchemeObject args, string evaluatorName, Evaluator caller)
{
string msg = numArgs < expectedArgs ? "few" : "many";
int lineNumber = caller.FindLineNumberInCallStack();
string lineMsg = lineNumber == 0 ? string.Empty : " at line: " + lineNumber;
ErrorHandlers.SemanticError(
string.Format(
@"""{0}"" too {1} args ({2}) for {3}: ""{4}""{5}",
evaluatorName,
msg,
numArgs,
this.ProcedureName,
args,
lineMsg),
null);
}
/// <summary>
/// Call apply proc evaluator after evaluating args.
/// </summary>
/// <param name="fn">The function to apply.</param>
/// <param name="args">The arguments to evaluate, the pass to fn.</param>
/// <param name="env">The environment to evaluate the expression in.</param>
/// <param name="caller">The caller. Return to this when done.</param>
/// <returns>The proc evaluator.</returns>
internal static Evaluator Call(Procedure fn, SchemeObject args, Environment env, Evaluator caller)
{
return new EvaluateProc(fn, args, env, caller, true);
}
/// <summary>
/// Call the sequence evaluator.
/// </summary>
/// <param name="expr">The expressions to evaluate.</param>
/// <param name="env">The environment to evaluate in.</param>
/// <param name="caller">The caller. Return to this when done.</param>
/// <returns>The sequence evaluator.</returns>
internal static Evaluator Call(SchemeObject expr, Environment env, Evaluator caller)
{
return new EvaluateSequence(expr, env, caller);
}
private void RewardItemImpl(InventoryItemQuestReward reward)
{
ServerInventoryItem targetItem = null;
switch (reward.ObjectType)
{
case InventoryObjectType.Material: {
MaterialItemQuestReward materialReward = reward as MaterialItemQuestReward;
if (materialReward != null)
{
MaterialObject material = new MaterialObject(materialReward.OreId);
targetItem = new ServerInventoryItem(material, materialReward.Count);
}
}
break;
case InventoryObjectType.Scheme: {
SchemeItemQuestReward schemeReward = reward as SchemeItemQuestReward;
if (schemeReward != null)
{
SchemeObject scheme = new SchemeObject(new SchemeObject.SchemeInitData(
id: Guid.NewGuid().ToString(),
name: string.Empty,
level: PlayerLevel,
workshop: PlayerWorkshop,
templateModuleId: resource.ModuleTemplates.Module(PlayerWorkshop, schemeReward.Slot).Id,
color: schemeReward.Color,
craftingMaterials: new Dictionary <string, int>(),
inSetID: string.Empty
));
targetItem = new ServerInventoryItem(scheme, schemeReward.Count);
}
}
break;
case InventoryObjectType.Weapon: {
WeaponItemQuestReward weaponReward = reward as WeaponItemQuestReward;
if (weaponReward != null)
{
WeaponDropper.WeaponDropParams weaponDropParams = new WeaponDropper.WeaponDropParams(
resource: resource,
level: PlayerLevel,
workshop: PlayerWorkshop,
damageType: WeaponDamageType.damage,
difficulty: Difficulty.none
);
ColorInfo colorInfo = resource.ColorRes.Color(ColoredObjectType.Weapon, weaponReward.Color);
DropManager dropManager = DropManager.Get(resource);
WeaponDropper weaponDropper = dropManager.GetWeaponDropper(dropParams: weaponDropParams);
WeaponObject weapon = weaponDropper.DropWeapon(colorInfo);
targetItem = new ServerInventoryItem(weapon, weaponReward.Count);
}
}
break;
}
if (targetItem != null)
{
GetComponent <MmoActor>()?.AddToStationInventory(item: targetItem, sendUpdateEvent: true);
}
}
/// <summary>
/// Call an expand evaluator.
/// This comes here with a macro (fn) and a set of macro arguments (args).
/// The args are unevaluated.
/// The macro is applied to the unevaluated arguments, yielding an expanded program.
/// Then the result is evaluated as an expression.
/// </summary>
/// <param name="fn">The macro to expand.</param>
/// <param name="args">The expression to evaluate.</param>
/// <param name="env">The environment to make the expression in.</param>
/// <param name="caller">The caller. Return to this when done.</param>
/// <returns>The expand evaluator.</returns>
internal static Evaluator Call(Macro fn, SchemeObject args, Environment env, Evaluator caller)
{
return new EvaluateExpandMacro(args, env, caller, fn);
}
/// <summary>
/// Initializes a new instance of the EvaluateExpandMacro class.
/// </summary>
/// <param name="expr">The expression to evaluate.</param>
/// <param name="env">The evaluation environment</param>
/// <param name="caller">The caller. Return to this when done.</param>
/// <param name="fn">The macro to expand.</param>
private EvaluateExpandMacro(SchemeObject expr, Environment env, Evaluator caller, Macro fn)
: base(ExpandStep, expr, env, caller)
{
this.fn = fn;
}
/// <summary>
/// Initializes a new instance of the SuspendedEvaluator class.
/// It is used to indicate that an evaluation has suspended rather than returning a value.
/// The caller is needed so that we can search for a catcher.
/// The SuspendedEvaluator is given as the ReturnedExpr of the evaluaton, and of the whole Eval.
/// The AsyncResult can be extracted from this if necessary, but is NOT the final async result,
/// just the intermediate result of this suspension.
/// AsyncResult is stored in Expr.
/// </summary>
/// <param name="res">The IAsyncResult associated with the suspension.</param>
/// <param name="caller">The calling evaluator.</param>
internal SuspendedEvaluator(SchemeObject res, Evaluator caller)
: base(null, res, null, caller)
{
}
/// <summary>
/// Initializes a new instance of the FinalEvaluator class.
/// </summary>
/// <param name="expr">The expression to return.</param>
internal FinalEvaluator(SchemeObject expr)
: base(null, null, null, null)
{
this.ReturnedExpr = expr;
this.Finished = true;
}
/// <summary>
/// Ensure that the given object is a procedure.
/// Used for checking before attempting to Apply a computed value.
/// </summary>
/// <param name="obj">The object to check</param>
/// <returns>The object as a procedure.</returns>
internal static Procedure EnsureProcedure(SchemeObject obj)
{
if (!(obj is Procedure))
{
ErrorHandlers.ProcError("Attempt to use as a procedure", obj);
}
return (Procedure)obj;
}
/// <summary>
/// Initializes a new instance of the EvaluateSequence class.
/// </summary>
/// <param name="expr">The expressions to evaluate.</param>
/// <param name="env">The evaluation environment</param>
/// <param name="caller">The caller. Return to this when done.</param>
private EvaluateSequence(SchemeObject expr, Environment env, Evaluator caller)
: base(EvalExprStep, expr, env, caller)
{
}
/// <summary> /// All subclasses have to be able to apply the procedure to arguments. /// That is what it means to be a procedure. /// </summary> /// <param name="args">The arguments to the procedure, which may or may not have /// been evaluated.</param> /// <param name="env">The application environment.</param> /// <param name="returnTo">The evaluator to return to. This can be different from caller if this is the last step in evaluation</param> /// <param name="caller">The calling evaluator.</param> /// <returns>The next evaluator to run after the application.</returns> internal abstract Evaluator Apply(SchemeObject args, Environment env, Evaluator returnTo, Evaluator caller);
/// <summary>
/// Initializes a new instance of the EvaluateProc class.
/// </summary>
/// <param name="fn">The function to apply.</param>
/// <param name="args">The arguments to evaluate.</param>
/// <param name="env">The evaluation environment</param>
/// <param name="caller">The caller. Return to this when done.</param>
/// <param name="evaluate">If true, evaluate the args. If false, do not evaluate them.</param>
private EvaluateProc(Procedure fn, SchemeObject args, Environment env, Evaluator caller, bool evaluate)
: base(EvalArgsStep, args, env, caller)
{
this.fn = fn;
}
/// <summary>
/// Evaluate the procedure.
/// At this point, the args are NOT evaluated
/// Macro is evaluated differently, and overrides this method.
/// This is a primitive, a lambda, a continuation, or a CLR Procedure.
/// Evaluate the arguments in the environment, then apply the function
/// to the arguments.
/// </summary>
/// <param name="args">The arguments to the procedure.</param>
/// <param name="env">The environment to use for the application.</param>
/// <param name="caller">Return here when done.</param>
/// <returns>The next evaluator to execute.</returns>
internal virtual Evaluator Evaluate(SchemeObject args, Environment env, Evaluator caller)
{
return EvaluateProc.Call(this, args, env, caller);
}
/// <summary>
/// Call apply proc evaluator, but do not evaluate arguments.
/// In this case, we can avoid having to instantiate an instance.
/// </summary>
/// <param name="fn">The function to apply.</param>
/// <param name="args">The arguments to pass to fn.</param>
/// <param name="env">The environment to evaluate the expression in.</param>
/// <param name="caller">The caller. Return to this when done.</param>
/// <returns>The proc evaluator.</returns>
internal static Evaluator CallQuoted(Procedure fn, SchemeObject args, Environment env, Evaluator caller)
{
return fn.Apply(args, null, caller, caller);
}
/// <summary>
/// Initializes a new instance of the EvaluateOr class.
/// </summary>
/// <param name="expr">The expression to evaluate.</param>
/// <param name="env">The evaluation environment</param>
/// <param name="caller">The caller. Return to this when done.</param>
private EvaluateOr(SchemeObject expr, Environment env, Evaluator caller)
: base(EvalTestStep, expr, env, caller)
{
}