public static Expression Apply(Expression[] args)
{
if (args.Length == 0)
{
return(null);
}
Expression c = Ast.ConvertHelper(args[0], typeof(Callable));
if (args.Length > 1)
{
Expression arg = Ast.ConvertHelper(args[args.Length - 1], typeof(object));
if (arg.IsConstant(null))
{
Debugger.Break();
}
for (int i = args.Length - 2; i > 0; i--)
{
arg = MakeCons(args[i], arg);
}
return(Ast.ComplexCallHelper(c, ICallable_Call, Ast.Call(ListToVector, arg)));
}
else
{
return(null);
}
}
public static Expression GetConsList(Cons c, CodeBlock cb)
{
List <int> splices = new List <int>();
List <Expression> e = new List <Expression>();
bool proper = true;
while (c != null)
{
e.Add(GetCons(c.car, cb));
if (c.cdr != null && !(c.cdr is Cons))
{
e.Add(GetCons(c.cdr, cb));
proper = false;
break;
}
c = c.cdr as Cons;
}
Expression r = null;
Expression[] aa = e.ToArray();
MethodInfo lm = MakeList(aa, proper);
r = Ast.ComplexCallHelper(lm, aa);
return(r);
}
protected static Expression CallNormal(CodeBlockExpression cbe, params Expression[] ppp)
{
bool needscontext = NeedsContext(cbe); // true;
int pc = ppp.Length;
MethodInfo dc = GetDirectCallable(needscontext, pc, cbe.Type);
List <Variable> paruninit = new List <Variable>(cbe.Block.Parameters);
for (int i = 0; i < ppp.Length; i++)
{
if (ppp[i].Type == typeof(Uninitialized))
{
paruninit[i].SetUnInitialized();
}
}
if (needscontext)
{
ppp = ArrayUtils.Insert <Expression>(Ast.CodeContext(), ppp);
}
var delegatetype = cbe.Type != typeof(Delegate) ? cbe.Type : CallTargets.GetTargetType(needscontext, pc, false);
cbe = Ast.CodeBlockReference(cbe.Block, delegatetype);
cbe.Block.Bind();
var r = Ast.ComplexCallHelper(cbe, dc, ppp);
if (SpanHint.IsValid)
{
r.SetLoc(SpanHint);
}
return(r);
}
private void SetErrorTarget(OperatorInfo info)
{
_rule.SetTarget(
_rule.MakeError(
Ast.ComplexCallHelper(
typeof(RuntimeHelpers).GetMethod("BadArgumentsForOperation"),
ArrayUtils.Insert((Expression)Ast.Constant(info.Operator), _rule.Parameters)
)
)
);
}
protected static Expression CallVarArgs(CodeBlockExpression cbe, Expression[] ppp)
{
bool needscontext = NeedsContext(cbe); //true;
int pc = cbe.Block.ParameterCount;
Expression[] tail = new Expression[ppp.Length - (pc - 1)];
Array.Copy(ppp, ppp.Length - tail.Length, tail, 0, tail.Length);
Expression[] nppp = new Expression[pc];
Array.Copy(ppp, nppp, ppp.Length - tail.Length);
if (tail.Length > 0)
{
nppp[nppp.Length - 1] = Ast.ComplexCallHelper(MakeList(tail, true), tail);
}
else
{
nppp[nppp.Length - 1] = Ast.Null();
}
ppp = nppp;
MethodInfo dc = GetDirectCallable(needscontext, pc, cbe.Type);
if (needscontext)
{
ppp = ArrayUtils.Insert <Expression>(Ast.CodeContext(), ppp);
}
cbe = Ast.CodeBlockReference(cbe.Block, CallTargets.GetTargetType(needscontext, pc, false));
cbe.Block.Bind();
var r = Ast.ComplexCallHelper(cbe, dc, ppp);
if (SpanHint.IsValid)
{
r.SetLoc(SpanHint);
}
return(r);
}
// (clr-call type member obj arg1 ... )
public override Expression Generate(object args, CodeBlock cb)
{
Type t = null;
string type = null;
bool inferred = false;
object rtype = Builtins.First(args);
ExtractTypeInfo(rtype, out t, out type, out inferred);
string member = null;
var marg = Builtins.Second(args);
object memobj = null;
Type[] argtypes = null;
Type[] gentypes = null;
if (marg is SymbolId)
{
var mem = Builtins.SymbolValue(marg);
if (mem is Cons)
{
ExtractMethodInfo(mem as Cons, out member, ref argtypes, ref gentypes);
}
else
{
ClrSyntaxError("clr-call", "type member not supported", mem);
}
}
else
{
memobj = Builtins.Second(marg);
member = memobj is SymbolId?SymbolTable.IdToString((SymbolId)memobj) : "";
if (memobj is string)
{
string mems = memobj as string;
int bi = mems.IndexOf('(');
if (bi < 0)
{
member = mems;
}
else
{
member = mems.Substring(0, bi);
}
}
else if (memobj is Cons)
{
ExtractMethodInfo(memobj as Cons, out member, ref argtypes, ref gentypes);
}
}
Expression instance = GetAst(Builtins.Third(args), cb);
CallType ct = CallType.ImplicitInstance;
if (instance is ConstantExpression && ((ConstantExpression)instance).Value == null)
{
ct = CallType.None;
if (inferred)
{
ClrSyntaxError("clr-call", "type inference not possible on static member", member);
}
}
else if (inferred)
{
if (instance is UnaryExpression && instance.Type == typeof(object))
{
var ue = (UnaryExpression)instance;
instance = ue.Operand;
}
t = instance.Type;
}
else
{
instance = ConvertToHelper(t, instance);
}
type = t.Name;
Expression[] arguments = GetAstListNoCast(Cdddr(args) as Cons, cb);
if (member == "get_Item")
{
if (Attribute.IsDefined(t, typeof(DefaultMemberAttribute)))
{
var dma = Attribute.GetCustomAttribute(t, typeof(DefaultMemberAttribute)) as DefaultMemberAttribute;
member = "get_" + dma.MemberName;
}
else if (t.IsArray)
{
var index = arguments[0];
return(Ast.ArrayIndex(instance, Ast.ConvertHelper(index, typeof(int))));
}
}
else if (member == "set_Item")
{
if (Attribute.IsDefined(t, typeof(DefaultMemberAttribute)))
{
var dma = Attribute.GetCustomAttribute(t, typeof(DefaultMemberAttribute)) as DefaultMemberAttribute;
member = "set_" + dma.MemberName;
}
else if (t.IsArray)
{
var index = arguments[0];
var v = arguments[1];
return(Ast.Comma(Ast.AssignArrayIndex(instance, Ast.ConvertHelper(index, typeof(int)), v), Ast.ReadField(null, Unspecified)));
}
}
List <MethodBase> candidates = new List <MethodBase>();
BindingFlags bf = BindingFlags.Public | (ct == CallType.None ? BindingFlags.Static : BindingFlags.Instance) | BindingFlags.FlattenHierarchy;
foreach (MethodInfo mi in t.GetMember(member, MemberTypes.Method, bf))
{
if (PAL.ExcludeParamtypes(mi))
{
continue;
}
if (mi.ContainsGenericParameters)
{
if (gentypes != null && mi.GetGenericArguments().Length == gentypes.Length)
{
candidates.Add(mi.MakeGenericMethod(gentypes));
continue;
}
}
candidates.Add(mi);
}
Type[] types = new Type[arguments.Length];
for (int i = 0; i < types.Length; i++)
{
types[i] = arguments[i].Type;
}
if (memobj is string)
{
string mems = memobj as string;
int bi = mems.IndexOf('(');
if (bi < 0)
{
// do notthig
}
else
{
string[] typeargs = mems.Substring(bi + 1).TrimEnd(')').Split(',');
for (int i = 0; i < types.Length; i++)
{
if (typeargs[i].Length > 0)
{
types[i] = ScanForType(typeargs[i]);
}
}
}
}
else if (argtypes != null)
{
for (int i = 0; i < types.Length; i++)
{
types[i] = argtypes[i];
}
}
if (ct == CallType.ImplicitInstance)
{
types = ArrayUtils.Insert(t, types);
}
MethodBinder mb = MethodBinder.MakeBinder(Binder, member, candidates, BinderType.Normal);
MethodCandidate mc = mb.MakeBindingTarget(ct, types);
if (mc == null)
{
types = new Type[arguments.Length];
for (int i = 0; i < types.Length; i++)
{
types[i] = typeof(object);
}
if (ct == CallType.ImplicitInstance)
{
types = ArrayUtils.Insert(t, types);
}
mc = mb.MakeBindingTarget(ct, types);
}
if (mc != null)
{
MethodInfo meth = (MethodInfo)mc.Target.Method;
// do implicit cast
ParameterInfo[] pars = meth.GetParameters();
for (int i = 0; i < arguments.Length; i++)
{
Type tt = pars[i].ParameterType;
arguments[i] = ConvertToHelper(tt, arguments[i]);
}
Expression r = null;
// o god...
if (ct == CallType.ImplicitInstance)
{
r = Ast.ComplexCallHelper(instance, (MethodInfo)mc.Target.Method, arguments);
}
else
{
r = Ast.ComplexCallHelper((MethodInfo)mc.Target.Method, arguments);
}
return(ConvertFromHelper(meth.ReturnType, r));
}
ClrSyntaxError("clr-call", "member could not be resolved on type: " + type, args, member);
return(null);
}
protected override bool Walk(MethodCallExpression node)
{
var i = node.Instance;
if (node.Method != Generator.ICallable_CallN)
{
while (i is UnaryExpression && i.NodeType == AstNodeType.Convert)
{
i = ((UnaryExpression)i).Operand;
}
if (i is BoundExpression)
{
var be = (BoundExpression)i;
var v = be.Variable.Name;
if (Builtins.IsTrue(Builtins.IsSymbolBound(v)))
{
var val = Builtins.SymbolValue(v);
var c = val as BuiltinMethod;
if (c != null)
{
var mb = c.Binder;
var pars = new Expression[node.Arguments.Count];
node.Arguments.CopyTo(pars, 0);
Type[] types = Array.ConvertAll(pars, x => x.Type);
MethodCandidate mc = mb.MakeBindingTarget(CallType.None, types);
if (mc != null)
{
var meth = mc.Target.Method as MethodInfo;
node.Method = meth;
node.Instance = null;
}
}
else if (val is Closure)
{
var cc = val as Closure;
// will not work on varargs, need to somehow decorate them
var meth = Array.Find(cc.Targets,
x => x.GetParameters().Length == node.Arguments.Count && (Generator.AllowTransientBinding || !Generator.IsTransient(x.Module)));
if (meth != null)
{
node.Method = meth;
node.Instance = null;
}
else
{
meth = Array.Find(cc.VarargTargets,
x => x.GetParameters().Length - 1 <= node.Arguments.Count && (Generator.AllowTransientBinding || !Generator.IsTransient(x.Module)));
if (meth != null)
{
var newargs = new List <Expression>();
var pars = meth.GetParameters();
var parlen = pars.Length;
int x = 0;
for (; x < parlen - 1; x++)
{
newargs.Add(node.Arguments[x]);
}
var tail = new List <Expression>();
for (; x < node.Arguments.Count; x++)
{
tail.Add(node.Arguments[x]);
}
var tailarr = tail.ToArray();
newargs.Add(Ast.ComplexCallHelper(Compiler.Generator.MakeList(tailarr, true), tailarr));
node.Arguments.Clear();
node.Arguments.AddRange(newargs);
node.Method = meth;
node.ParameterInfos = pars;
node.Instance = null;
}
}
}
}
}
}
return(base.Walk(node));
}
protected internal static Expression GetAst(object args, CodeBlock cb, bool istailposition)
{
if (args is Annotation)
{
args = ((Annotation)args).stripped;
}
Cons c = args as Cons;
if (c != null)
{
if (c.car is SymbolId)
{
SymbolId f = (SymbolId)c.car;
Variable var = cb.Lookup(f);
if (var != null && !assigns.ContainsKey(f))
{
var = null;
}
object m;
#if OPTIMIZATIONS
#if !BLAH
CodeBlockExpression cbe;
//// needs to do the same for overloads...
if (SimpleGenerator.libraryglobals.TryGetValue(f, out cbe))
{
Expression[] ppp = GetAstListNoCast(c.cdr as Cons, cb);
if (cbe.Block.ParameterCount < 9 && cbe.Block.ParameterCount == ppp.Length)
{
//inline here? we could for simple bodies, but we need to copy the entire structure
if (!(cbe.Block.HasEnvironment || cbe.Block.IsClosure))
{
if (cbe.Block.Body is ReturnStatement)
{
ReturnStatement rs = (ReturnStatement)cbe.Block.Body;
if (!ScriptDomainManager.Options.DebugMode &&
!ScriptDomainManager.Options.LightweightDebugging &&
!cb.IsGlobal && IsSimpleExpression(rs.Expression))
{
return(InlineCall(cb, Ast.CodeBlockExpression(RewriteBody(cbe.Block), false, cbe.IsStronglyTyped), ppp));
}
}
}
if (cbe.Block != cb.Parent && cbe.Block != cb) // do TCE later
{
return(CallNormal(cbe, ppp));
}
}
}
// varargs
if (SimpleGenerator.libraryglobalsX.TryGetValue(f, out cbe))
{
Expression[] ppp = GetAstListNoCast(c.cdr as Cons, cb);
if (cbe.Block.ParameterCount < 9 && cbe.Block.ParameterCount - 1 <= ppp.Length)
{
//inline here?
return(CallVarArgs(cbe, ppp));
}
}
// overloads
CodeBlockDescriptor[] cbd;
if (SimpleGenerator.libraryglobalsN.TryGetValue(f, out cbd))
{
Expression[] ppp = GetAstListNoCast(c.cdr as Cons, cb);
foreach (CodeBlockDescriptor d in cbd)
{
if (d.codeblock.Block.ParameterCount < 9)
{
if (ppp.Length == d.arity || (d.varargs && ppp.Length > d.arity))
{
if (d.varargs)
{
//inline here?
return(CallVarArgs(d.codeblock, ppp));
}
else
{
//inline here?
//if (d.codeblock.Block != cb.Parent && d.codeblock.Block != cb) // do TCE later, not yet
{
return(CallNormal(d.codeblock, ppp));
}
}
}
}
}
}
#endif
//if (!ScriptDomainManager.Options.DebugMode)
{
if (f == SymbolTable.StringToId("call-with-values"))
{
Expression[] ppp = GetAstListNoCast(c.cdr as Cons, cb);
if (ppp.Length == 2 && ppp[1] is MethodCallExpression)
{
MethodCallExpression consumer = ppp[1] as MethodCallExpression;
if (ppp[0] is MethodCallExpression)
{
MethodCallExpression producer = ppp[0] as MethodCallExpression;
if (consumer.Method == Closure_Make && producer.Method == Closure_Make)
{
CodeBlockExpression ccbe = consumer.Arguments[0] as CodeBlockExpression;
CodeBlockExpression pcbe = producer.Arguments[0] as CodeBlockExpression;
pcbe.Block.Bind();
ccbe.Block.Bind();
if (ccbe.Block.ParameterCount == 0)
{
return(InlineCall(cb, ccbe));
}
else if (ccbe.Block.ParameterCount == 1)
{
return(InlineCall(cb, ccbe, Ast.SimpleCallHelper(typeof(Helpers).GetMethod("UnwrapValue"), InlineCall(cb, pcbe))));
}
else
{
Variable values = cb.CreateTemporaryVariable((SymbolId)Builtins.GenSym("values"), typeof(object[]));
Expression valuesarr = Ast.Read(values);
Expression[] pppp = new Expression[ccbe.Block.ParameterCount];
for (int i = 0; i < pppp.Length; i++)
{
pppp[i] = Ast.ArrayIndex(valuesarr, Ast.Constant(i));
}
return(Ast.Comma(
Ast.Void(
Ast.Write(
values,
Ast.ComplexCallHelper(
Ast.SimpleCallHelper(typeof(Helpers).GetMethod("WrapValue"), InlineCall(cb, pcbe)),
typeof(MultipleValues).GetMethod("ToArray", new Type[] { typeof(int) }),
Ast.Constant(pppp.Length)))),
InlineCall(cb, ccbe, pppp)));
}
}
}
if (consumer.Method == Closure_Make)
{
CodeBlockExpression ccbe = consumer.Arguments[0] as CodeBlockExpression;
ccbe.Block.Bind();
Expression producer = ppp[0];
Expression exx = Ast.ConvertHelper(producer, typeof(Callable));
MethodInfo callx = GetCallable(0);
if (ccbe.Block.ParameterCount == 0)
{
return(InlineCall(cb, ccbe));
}
else if (ccbe.Block.ParameterCount == 1)
{
return(InlineCall(cb, ccbe, Ast.SimpleCallHelper(typeof(Helpers).GetMethod("UnwrapValue"), Ast.Call(exx, callx))));
}
else
{
Variable values = cb.CreateTemporaryVariable((SymbolId)Builtins.GenSym("values"), typeof(object[]));
Expression valuesarr = Ast.Read(values);
Expression[] pppp = new Expression[ccbe.Block.ParameterCount];
for (int i = 0; i < pppp.Length; i++)
{
pppp[i] = Ast.ArrayIndex(valuesarr, Ast.Constant(i));
}
return(Ast.Comma(
Ast.Void(
Ast.Write(
values,
Ast.ComplexCallHelper(
Ast.SimpleCallHelper(typeof(Helpers).GetMethod("WrapValue"),
Ast.Call(exx, callx)),
typeof(MultipleValues).GetMethod("ToArray", new Type[] { typeof(int) }),
Ast.Constant(pppp.Length)))),
InlineCall(cb, ccbe, pppp)));
}
}
}
else
{
;
}
}
}
#endif
// this can be enabled once builtins are auto CPS'd.
// ok I tried, but there are issues still, not sure what
#if OPTIMIZATIONS
// check for inline emitter
InlineEmitter ie;
if (TryGetInlineEmitter(f, out ie))
{
Expression result = ie(GetAstList(c.cdr as Cons, cb));
// if null is returned, the method cannot be inlined
if (result != null)
{
if (spanhint.IsValid)
{
result.SetLoc(spanhint);
}
return(result);
}
}
#endif
if (Context.Scope.TryLookupName(f, out m))
{
if (var == null)
{
IGenerator gh = m as IGenerator;
if (gh != null)
{
return(gh.Generate(c.cdr, cb));
}
BuiltinMethod bf = m as BuiltinMethod;
if (bf != null)
{
MethodBinder mb = bf.Binder;
Expression[] pars = Array.ConvertAll(GetAstList(c.cdr as Cons, cb), e => Unwrap(e));
if (bf.AllowConstantFold && !ScriptDomainManager.Options.DebugMode)
{
bool constant = Array.TrueForAll(pars, e => e is ConstantExpression && e.Type != typeof(BigInteger));
if (constant)
{
object[] cargs = Array.ConvertAll(pars, e => GetRuntimeConstant((ConstantExpression)e));
CallTarget0 disp = delegate
{
return(bf.Call(cargs));
};
CallTarget1 handler = delegate(object e)
{
throw new CompileTimeEvaluationException();
};
try
{
object result = Runtime.R6RS.Exceptions.WithExceptionHandler(
Closure.Create(handler),
Closure.Create(disp));
var rrrr = GetCons(result, cb);
if (spanhint.IsValid)
{
rrrr.SetLoc(spanhint);
}
return(rrrr);
}
catch (CompileTimeEvaluationException)
{
}
}
}
Type[] types = GetExpressionTypes(pars);
MethodCandidate mc = mb.MakeBindingTarget(CallType.None, types);
if (mc != null)
{
if (mc.Target.NeedsContext)
{
pars = ArrayUtils.Insert <Expression>(Ast.CodeContext(), pars);
}
MethodBase meth = mc.Target.Method;
var rrrr = Ast.ComplexCallHelper(meth as MethodInfo, pars);
if (spanhint.IsValid)
{
rrrr.SetLoc(spanhint);
}
return(rrrr);
}
}
Closure clos = m as Closure;
if (clos != null && !SetGenerator.IsAssigned(f))
{
// no provision for varargs
MethodInfo[] mis = clos.Targets;
if (mis.Length > 0)
{
MethodBinder mb = MethodBinder.MakeBinder(binder, SymbolTable.IdToString(f), mis, BinderType.Normal);
Expression[] pars = Array.ConvertAll(GetAstList(c.cdr as Cons, cb), e => Unwrap(e));
if (clos.AllowConstantFold && !ScriptDomainManager.Options.DebugMode)
{
bool constant = Array.TrueForAll(pars, e => e is ConstantExpression && e.Type != typeof(BigInteger));
if (constant)
{
object[] cargs = Array.ConvertAll(pars, e => GetRuntimeConstant((ConstantExpression)e));
CallTarget0 disp = delegate
{
var rrrr = clos.Call(cargs);
return(rrrr);
};
CallTarget1 handler = delegate(object e)
{
throw new CompileTimeEvaluationException();
};
try
{
object result = Runtime.R6RS.Exceptions.WithExceptionHandler(
Closure.Create(handler),
Closure.Create(disp));
var rrrr = GetCons(result, cb);
if (spanhint.IsValid)
{
rrrr.SetLoc(spanhint);
}
return(rrrr);
}
catch (CompileTimeEvaluationException)
{
}
}
}
// exclude transient members if needed
if (!AllowTransientBinding)
{
mis = Array.FindAll(mis, x => !IsTransient(x.Module));
}
if (mis.Length > 0)
{
Type[] types = GetExpressionTypes(pars);
MethodCandidate mc = mb.MakeBindingTarget(CallType.None, types);
if (mc != null)
{
if (mc.Target.NeedsContext)
{
pars = ArrayUtils.Insert <Expression>(Ast.CodeContext(), pars);
}
MethodBase meth = mc.Target.Method;
var rrrr = Ast.ComplexCallHelper(meth as MethodInfo, pars);
if (spanhint.IsValid)
{
rrrr.SetLoc(spanhint);
}
return(rrrr);
}
}
}
// check for overload thing
}
}
}
}
Expression ex = Unwrap(GetAst(c.car, cb));
// a 'let'
if (ex is MethodCallExpression)
{
var ppp = GetAstList(c.cdr as Cons, cb);
MethodCallExpression mcexpr = (MethodCallExpression)ex;
if (mcexpr.Method == Closure_Make)
{
CodeBlockExpression cbe = mcexpr.Arguments[0] as CodeBlockExpression;
if (ppp.Length < 9 && cbe.Block.ParameterCount == ppp.Length)
{
return(InlineCall(cb, cbe, istailposition, ppp));
}
}
// cater for varargs more efficiently, this does not seem to hit, probably needed somewhere else
if (mcexpr.Method == Closure_MakeVarArgsX)
{
CodeBlockExpression cbe = mcexpr.Arguments[0] as CodeBlockExpression;
if (ppp.Length < 9 && cbe.Block.ParameterCount <= ppp.Length)
{
return(CallVarArgs(cbe, ppp));
}
}
}
if (ex is NewExpression && typeof(ITypedCallable).IsAssignableFrom(ex.Type))
{
NewExpression mcexpr = ex as NewExpression;
CodeBlockExpression cbe = mcexpr.Arguments[0] as CodeBlockExpression;
if (cbe == null && mcexpr.Arguments[0].Type == typeof(CodeContext) && mcexpr.Arguments[0] is ConstantExpression) // implies null
{
cbe = mcexpr.Arguments[1] as CodeBlockExpression;
}
if (cbe != null)
{
var ppp = GetAstListNoCast(c.cdr as Cons, cb);
if (ppp.Length < 9 && cbe.Block.ParameterCount == ppp.Length)
{
return(InlineCall(cb, cbe, istailposition, ppp));
}
}
}
if (ex is ConstantExpression)
{
Builtins.SyntaxError(SymbolTable.StringToObject("generator"), "expecting a procedure", c.car, c);
}
Expression r = null;
if (ex.Type.Name.Contains("TypedClosure"))
{
Expression[] pp = GetAstListNoCast(c.cdr as Cons, cb);
var m = ex.Type.GetMethod("Invoke");
r = Ast.SimpleCallHelper(ex, m, pp);
}
else
{
Expression[] pp = GetAstList(c.cdr as Cons, cb);
if (ex.Type != typeof(Callable))
{
ex = Ast.ConvertHelper(ex, typeof(Callable));
}
MethodInfo call = GetCallable(pp.Length);
r = pp.Length > 8 ?
Ast.Call(ex, call, Ast.NewArray(typeof(object[]), pp)) :
Ast.Call(ex, call, pp);
}
if (spanhint.IsValid)
{
r.SetLoc(spanhint);
}
return(r);
}
object[] v = args as object[];
if (v != null)
{
return(GetConsVector(v, cb));
}
else if (args is byte[])
{
Expression[] ba = Array.ConvertAll(args as byte[], b => Ast.Constant(b));
return(Ast.NewArray(typeof(byte[]), ba));
}
else
{
if (args is SymbolId)
{
SymbolId sym = (SymbolId)args;
if (sym == SymbolTable.StringToId("uninitialized"))
{
return(Ast.ReadField(null, typeof(Uninitialized), "Instance"));
}
else
{
return(Read(sym, cb, typeof(object)));
}
}
if (args == Builtins.Unspecified)
{
return(Ast.ReadField(null, Unspecified));
}
if (args is Fraction)
{
Fraction f = (Fraction)args;
return(Ast.Constant(new FractionConstant(f)));
}
if (args is ComplexFraction)
{
ComplexFraction f = (ComplexFraction)args;
return(Ast.Constant(new ComplexFractionConstant(f)));
}
if (args != null && args.GetType().Name == "stx")
{
args = new SerializedConstant(args);
}
return(Ast.Constant(args));
}
}