private static void ProcessOptionalArguments(Cons argumentNameList, Cons argumentList,
Environment localEnvironment)
{
// We need to add all the arguments to the closure's environment.
while (argumentNameList != null)
{
Symbol argumentName = null;
object argumentValue = null;
// We need to get the name of the argument, it can either be just the name or, it can be
// it's own Cons with the name and an expression for the default value.
if (argumentNameList.Car() is Cons)
{
// It is a Cons, so extract the name and the default value.
argumentName = (Symbol)argumentNameList.Caar();
argumentValue = argumentNameList.Cadar();
}
else
{
argumentName = (Symbol)argumentNameList.Car();
}
// Now, if the caller has specified a value for this argument, get it now.
if (argumentList != null)
{
argumentValue = argumentList.Car();
argumentList = (Cons)argumentList.Cdr();
}
// Finally add the parameter to the closure's list and then move onto the next argument.
// Because the default can be any expression, we need to evaluate the value every time the
// function is called.
localEnvironment.AssignLocal(argumentName, Runtime.Eval(argumentValue, localEnvironment));
argumentNameList = (Cons)argumentNameList.Cdr();
}
// Looks like the caller has supplied more parameters than the closure can use.
if (argumentList != null)
{
throw new LSharpException("Too many parameters given.");
}
}
/// <summary>
/// (gui-inspect OBJECT)
/// shows a Form with data on the item OBJECT
/// </summary>
/// <param name="args"></param>
/// <param name="environment"></param>
/// <returns></returns>
public static object GuiInspect(Cons args, Environment environment)
{
// TODO : Fix
//string sname = (string) Functions.SymbolName(new Cons(args.First()), environment);
InspectorForm i = new InspectorForm(args.Car(), environment);
i.ShowDialog();
return args.First();
}
/// <summary>
/// Process the arguments passed to a closure, and add them to the given enviroment.
/// </summary>
/// <param name="argumentNameList">The list of names and kewords the closure was created with.</param>
/// <param name="argumentList">The arguments passed to the closure.</param>
/// <param name="localEnvironment">The closure's local variables.</param>
/// <returns>Nothing.</returns>
public static void ProcessArguments(Cons argumentNameList, Cons argumentList, Environment localEnvironment)
{
while (argumentNameList != null)
{
// Get the name for the closure's parameter. Then check to see if it's a keyword, if it is then
// process the keyword. Otherwise set up that parameter in the closure's enviroment with the
// caller specified value.
Symbol argumentName = (Symbol)argumentNameList.Car();
switch (argumentName.ToString())
{
case "&rest":
argumentName = (Symbol)argumentNameList.Cadr();
localEnvironment.AssignLocal(argumentName, argumentList);
argumentNameList = null;
argumentList = null;
break;
case "&optional":
ProcessOptionalArguments((Cons)argumentNameList.Cdr(), argumentList, localEnvironment);
argumentNameList = null;
argumentList = null;
break;
case "&key":
ProcessKeyArguments((Cons)argumentNameList.Cdr(), argumentList, localEnvironment);
argumentNameList = null;
argumentList = null;
break;
default:
if (argumentList == null)
{
throw new LSharpException("Not enough parameters given.");
}
localEnvironment.AssignLocal(argumentName, argumentList.Car());
argumentList = (Cons)argumentList.Cdr();
argumentNameList = (Cons)argumentNameList.Cdr();
break;
}
}
// Looks like the caller has supplied more parameters than the closure can use.
if (argumentList != null)
{
throw new LSharpException("Too many parameters given.");
}
}
public static Object Length(Cons args, Environment environment)
{
object o = args.Car();
if (o == null)
{
return(0);
}
else
{
return(Runtime.Call("length", args));
}
}
public override bool Equals(object obj)
{
if (obj is Cons)
{
Cons that = (Cons)obj;
bool carsEqual = Primitives.Eql(this.Car(), that.Car());
bool cdrsEqual = Primitives.Eql(this.Cdr(), that.Cdr());
return(carsEqual && cdrsEqual);
}
else
{
return(false);
}
}
/// <summary>
/// (length expression)
/// Returns the length of expression. If expression is null, length returns 0,
/// otherwise the length is calculated by calling the length method on the object,
/// ensuring that length works for strings, lists and most collection-like objects.
/// </summary>
/// <param name="args"></param>
/// <param name="environment"></param>
/// <returns></returns>
public static Object Length(Cons args, Environment environment)
{
object o = args.Car();
if (o == null)
return 0;
else
return Runtime.Call("length", args);
}
public static string WriteToString(Object x)
{
if (x == null)
{
return("null");
}
if (x == Reader.EOFVALUE)
{
return("EOF");
}
Type type = x.GetType();
if (x is string)
{
return(string.Format("\"{0}\"", (string)x));
}
if (x is bool)
{
return(x.ToString().ToLower());
}
if (x is char)
{
return(string.Format("#\\{0}", x));
}
if (x is Symbol)
{
return(string.Format("{0}", x));
}
if (x is Cons)
{
bool wasquote = true;
Cons cons = (Cons)x;
StringBuilder stringBuilder = new StringBuilder();
Symbol car = cons.Car() as Symbol;
if (car == Symbol.QUOTE)
{
stringBuilder.Append("'");
}
else if (car == Symbol.BACKQUOTE)
{
stringBuilder.Append("`");
}
else if (car == Symbol.SPLICE)
{
stringBuilder.Append(",@");
}
else if (car == Symbol.UNQUOTE)
{
stringBuilder.Append(",");
}
else
{
wasquote = false;
stringBuilder.Append("(");
stringBuilder.Append(WriteToString(cons.Car()));
stringBuilder.Append(" ");
}
Object o;
o = cons.Cdr();
while (o != null)
{
if (o is Cons)
{
cons = (Cons)o;
stringBuilder.Append(WriteToString(cons.Car()));
o = cons.Cdr();
if (o != null)
{
stringBuilder.Append(" ");
}
}
else
{
stringBuilder.Append(". ");
stringBuilder.Append(WriteToString(o));
o = null;
}
}
string op = stringBuilder.ToString().Trim();
if (wasquote)
{
return(op);
}
else
{
return(op + ")");
}
}
return(x.ToString().Trim());
}
/// <summary>
/// (play-sound filename)
/// Plays the sound from filename
/// </summary>
/// <param name="args"></param>
/// <param name="e"></param>
/// <returns></returns>
public static object PlaySound(Cons args, Environment e)
{
return Sound.Play((string) args.Car());
}
/// <summary>
/// (call method object argument*)
/// Calls a .NET method on a given object with given arguments.
/// This is useful if the method name clashes with a variable which is already
/// bound in the current L Sharp lexical environment.
/// </summary>
/// <param name="args"></param>
/// <param name="environment"></param>
/// <returns></returns>
public static Object Call(Cons args, Environment environment)
{
return Runtime.Call(args.Car().ToString(),
(Cons)Runtime.EvalList(args.Rest(),environment));
}
private static void ProcessKeyArguments(Cons argumentNameList, Cons argumentList,
Environment localEnvironment)
{
// Make sure that all of the defined key arguments are inserted to the local enviroment with their
// defaults.
while (argumentNameList != null)
{
Symbol argumentName = null;
object argumentValue = null;
// We need to get the name of the argument, it can either be just the name or, it can be
// it's own Cons with the name and an expression for the default value.
if (argumentNameList.Car() is Cons)
{
// It is a Cons, so extract the name and the default value. Because the default can be
// any expression, we need to evaluate the value every time the function is called.
argumentName = (Symbol)argumentNameList.Caar();
argumentValue = Runtime.Eval(argumentNameList.Cadar(), localEnvironment);
}
else
{
argumentName = (Symbol)argumentNameList.Car();
}
// Add this variable to the closure's environment, then advance to the next parameter.
localEnvironment.AssignLocal(argumentName, argumentValue);
argumentNameList = (Cons)argumentNameList.Cdr();
}
// Now that the parameters and their defaults have been added to the environment we can now
// process the supplied arguments.
while (argumentList != null)
{
// Because these are keyed parameters, the caller needs to specify the name of each
// parameter.
if (argumentList.Car().GetType() != typeof(Symbol))
{
throw new LSharpException("Key parameters must be specified by name.");
}
// Grab the current parameter and the value associated with it. Then make sure that this
// is a keyword.
Symbol keywordName = (Symbol)argumentList.Car();
object argumentValue = argumentList.Cadr();
if (keywordName.Name[0] != ':')
{
throw new LSharpException(keywordName + " is not a valid keyword.");
}
// Now that we know they supplied a keyword, create a symbol out of it and make sure that
// it exists.
//keywordName = new Symbol(keywordName.Name.Substring(1));
keywordName = Symbol.FromName(keywordName.Name.Substring(1));
if (localEnvironment.Contains(keywordName) == false)
{
throw new LSharpException(keywordName + " is not a recognised keyword.");
}
// Update the parameter with the value that the user specified and then move onto the next
// argument in the list.
localEnvironment.AssignLocal(keywordName, argumentValue);
argumentList = (Cons)argumentList.Cddr();
}
}
public static Object Call(Cons args, Environment environment)
{
return(Runtime.Call(args.Car().ToString(),
(Cons)Runtime.EvalList(args.Rest(), environment)));
}
public static object Item(Cons args, Environment environment)
{
int index = (int)args.Car();
Array array = (Array) args.Cadr();
return array.GetValue(index);
}
private static void ProcessOptionalArguments(Cons argumentNameList, Cons argumentList,
Environment localEnvironment)
{
// We need to add all the arguments to the closure's environment.
while (argumentNameList != null)
{
Symbol argumentName = null;
object argumentValue = null;
// We need to get the name of the argument, it can either be just the name or, it can be
// it's own Cons with the name and an expression for the default value.
if (argumentNameList.Car().GetType() == typeof(Cons))
{
// It is a Cons, so extract the name and the default value.
argumentName = (Symbol)argumentNameList.Caar();
argumentValue = argumentNameList.Cadar();
}
else
{
argumentName = (Symbol)argumentNameList.Car();
}
// Now, if the caller has specified a value for this argument, get it now.
if (argumentList != null)
{
argumentValue = argumentList.Car();
argumentList = (Cons)argumentList.Cdr();
}
// Finally add the parameter to the closure's list and then move onto the next argument.
// Because the default can be any expression, we need to evaluate the value every time the
// function is called.
localEnvironment.AssignLocal(argumentName, Runtime.Eval(argumentValue, localEnvironment));
argumentNameList = (Cons)argumentNameList.Cdr();
}
// Looks like the caller has supplied more parameters than the closure can use.
if (argumentList != null)
{
throw new LSharpException("Too many parameters given.");
}
}
/// <summary>
/// (call method object argument*)
/// </summary>
public static Object Call(Cons args, LSharp.Environment environment)
{
string v = //"//(call " + Printer.ConsToString(args) + ")" + NewLine +
"{" + NewLine;
ArrayList argtypes = new ArrayList();
ArrayList argz = new ArrayList();
if (args.Length() > 2)
{
foreach (object arg in (args.Cddr() as Cons))
{
if (Primitives.IsAtom(arg))
{
argz.Add(Printer.WriteToString(arg));
}
else
{
string argn = MakeUnique("arg");
string sv = Generate(arg, environment);
sv += string.Format(@"{0} {1} = ({0}) retval;
", typeof(object) , argn);
argz.Add(argn);
v += sv;
}
argtypes.Add(typeof(object));
}
}
string typemethname = args.Car().ToString();
string methname = typemethname;
string typename = string.Empty;
Type type = typeof(object);
int i = methname.LastIndexOf(".");
if (i >= 0)
{
methname = methname.Substring(i + 1);
typename = typemethname.Substring(0, i);
type = TypeCache.FindType(typename);
}
MethodInfo mi = null;
mi = type.GetMethod(methname, BindingFlags.IgnoreCase
| BindingFlags.Public | BindingFlags.Instance, binder, argtypes.ToArray(typeof(Type)) as Type[], null);
string objn = string.Empty;
if (mi == null)
{
type = TypeCache.FindType(args.Second().ToString());
mi = type.GetMethod(methname, BindingFlags.IgnoreCase
| BindingFlags.Public | BindingFlags.Static, binder, argtypes.ToArray(typeof(Type)) as Type[], null);
if (mi == null)
{
// use reflection
v += Generate(args.Second(), environment);
v += string.Format(@"retval = retval.GetType().InvokeMember(""{0}"",
BindingFlags.IgnoreCase | BindingFlags.Public | BindingFlags.Instance, null, retval,
new object[]{{", methname) +
string.Join(", ", argz.ToArray(typeof(string)) as string[]) + @"});
}
";
return v;
}
else
{
objn = type.ToString();
}
}
else
{
objn = MakeUnique("obj");
v += Generate(args.Second(), environment);
v += string.Format(@"{0} {1} = ({0}) retval;
", type, objn);
}
v += "retval = " + (mi.ReturnType == typeof(void) ? @"null;
" : "") + objn + "." + mi.Name + "(" +
string.Join(", ", argz.ToArray(typeof(string)) as string[]);
return v + @");
}
";
}
public static string GenerateCons(Cons args, LSharp.Environment environment)
{
// ananlysi cons
if (args == null)
{
return @"//retval = null; // dont null mite need retval
";
}
else
{
Symbol sym = args.Car() as Symbol;
object e = Runtime.Eval(sym, environment);
if (e is Function)
{
Function f = e as Function;
string v = "{" + NewLine;
Cons rest = args.Rest() as Cons;
v += GenerateFuncCall(f.Method.DeclaringType.ToString(), f.Method.Name, rest, environment);
return v + "}" + NewLine;
}
else if (e is SpecialForm)
{
SpecialForm f = e as SpecialForm;
Cons rest = args.Rest() as Cons;
string r = Printer.ConsToString(rest);
string lFName = f.Method.Name.ToLower();
if (lFName == "while")
return While(rest, environment) as string;
if (lFName == "for")
return For(rest, environment) as string;
if (lFName == "and")
return And(rest, environment) as string;
if (lFName == "call")
return Call(rest, environment) as string;
if (lFName == "cond")
return Cond(rest, environment) as string;
if (lFName == "do")
return Do(rest, environment) as string;
if (lFName == "foreach")
return ForEach(rest, environment) as string;
if (lFName == "if")
return If(rest, environment) as string;
if (lFName == "let")
return Let(rest, environment) as string;
if (lFName == "or")
return Or(rest, environment) as string;
if (lFName == "quote")
return Quote(rest, environment) as string;
if (lFName == "setq")
return Setq(rest, environment) as string;
if (lFName == "the")
return The(rest, environment) as string;
if (lFName == "to")
return To(rest, environment) as string;
if (lFName == "try")
return Try(rest, environment) as string;
if (lFName == "when")
return When(rest, environment) as string;
if (lFName == "with")
return With(rest, environment) as string;
return Runtime.EvalString("(" + f.Method.Name + " " + r + ")", environment) as string;
}
else if (e is Macro)
{
Macro m = e as Macro;
Cons rest = args.Rest() as Cons;
Cons em = m.Expand(rest) as Cons;
return Generate(em, environment);
}
else if (e is Closure)
{
extracode += Closure(new Cons(sym), environment) as string;
string v = "{" + NewLine;
Cons rest = args.Rest() as Cons;
v += GenerateFuncCall(null, environment.GetValue(sym) as string, rest, environment);
return v + "}" + NewLine;
}
else if (currsymbols.ContainsKey(sym))
{
string v = "{" + NewLine;
Cons rest = args.Rest() as Cons;
v += GenerateFuncCall(null, environment.GetValue(sym) as string, rest, environment);
return v + "}" + NewLine;
}
else
{
// not good, lets not support this for now: .NET method call
try
{
// try: LSharp.Runtime.Appy(<args>);
Cons rest = args.Rest() as Cons;
string ret = GenerateList(rest, environment, "temporarytableforspecialfunctioncall");
ret += "\nLSharp.Runtime.Apply(retval, LSharp.Cons.FromList(temporarytableforspecialfunctioncall), environment);";
//return ret; //"// call not supported";// Call(args, environment).ToString();
return Call(args, environment) as string;
}
catch
{
string margs = GetArgs();
string v = GenerateList(args.Rest() as Cons, environment, margs);
return string.Format("retval = LSharp.Cons.FromList({0});{1}",
margs, NewLine);
}
}
}
}
/// <summary>
/// Process the arguments passed to a closure, and add them to the given enviroment.
/// </summary>
/// <param name="argumentNameList">The list of names and kewords the closure was created with.</param>
/// <param name="argumentList">The arguments passed to the closure.</param>
/// <param name="localEnvironment">The closure's local variables.</param>
/// <returns>Nothing.</returns>
public static void ProcessArguments(Cons argumentNameList, Cons argumentList, Environment localEnvironment)
{
while (argumentNameList != null)
{
// Get the name for the closure's parameter. Then check to see if it's a keyword, if it is then
// process the keyword. Otherwise set up that parameter in the closure's enviroment with the
// caller specified value.
Symbol argumentName = (Symbol)argumentNameList.Car();
switch (argumentName.ToString())
{
case "&rest":
argumentName = (Symbol)argumentNameList.Cadr();
localEnvironment.AssignLocal(argumentName, argumentList);
argumentNameList = null;
argumentList = null;
break;
case "&optional":
ProcessOptionalArguments((Cons)argumentNameList.Cdr(), argumentList, localEnvironment);
argumentNameList = null;
argumentList = null;
break;
case "&key":
ProcessKeyArguments((Cons)argumentNameList.Cdr(), argumentList, localEnvironment);
argumentNameList = null;
argumentList = null;
break;
default:
if (argumentList == null)
{
throw new LSharpException("Not enough parameters given.");
}
localEnvironment.AssignLocal(argumentName, argumentList.Car());
argumentList = (Cons)argumentList.Cdr();
argumentNameList = (Cons)argumentNameList.Cdr();
break;
}
}
// Looks like the caller has supplied more parameters than the closure can use.
if (argumentList != null)
{
throw new LSharpException("Too many parameters given.");
}
}
private static void ProcessKeyArguments(Cons argumentNameList, Cons argumentList,
Environment localEnvironment)
{
// Make sure that all of the defined key arguments are inserted to the local enviroment with their
// defaults.
while (argumentNameList != null)
{
Symbol argumentName = null;
object argumentValue = null;
// We need to get the name of the argument, it can either be just the name or, it can be
// it's own Cons with the name and an expression for the default value.
if (argumentNameList.Car().GetType() == typeof(Cons))
{
// It is a Cons, so extract the name and the default value. Because the default can be
// any expression, we need to evaluate the value every time the function is called.
argumentName = (Symbol)argumentNameList.Caar();
argumentValue = Runtime.Eval(argumentNameList.Cadar(), localEnvironment);
}
else
{
argumentName = (Symbol)argumentNameList.Car();
}
// Add this variable to the closure's environment, then advance to the next parameter.
localEnvironment.AssignLocal(argumentName, argumentValue);
argumentNameList = (Cons)argumentNameList.Cdr();
}
// Now that the parameters and their defaults have been added to the environment we can now
// process the supplied arguments.
while (argumentList != null)
{
// Because these are keyed parameters, the caller needs to specify the name of each
// parameter.
if (argumentList.Car().GetType() != typeof(Symbol))
{
throw new LSharpException("Key parameters must be specified by name.");
}
// Grab the current parameter and the value associated with it. Then make sure that this
// is a keyword.
Symbol keywordName = (Symbol)argumentList.Car();
object argumentValue = argumentList.Cadr();
if (keywordName.Name[0] != ':')
{
throw new LSharpException(keywordName + " is not a valid keyword.");
}
// Now that we know they supplied a keyword, create a symbol out of it and make sure that
// it exists.
//keywordName = new Symbol(keywordName.Name.Substring(1));
keywordName = Symbol.FromName(keywordName.Name.Substring(1));
if (localEnvironment.Contains(keywordName) == false)
{
throw new LSharpException(keywordName + " is not a recognised keyword.");
}
// Update the parameter with the value that the user specified and then move onto the next
// argument in the list.
localEnvironment.AssignLocal(keywordName, argumentValue);
argumentList = (Cons)argumentList.Cddr();
}
}