internal void CompileExpr(ILGen il, LocalAccess locals, Stack<Type> st, object lval)
{
if (lval == null)
{
il.EmitNull();
st.Push(typeof(System.Object));
}
else if (Lisp.IsNode(lval))
{
if (lval == Lisp.NIL || lval == Lisp.T)
{
if (lval == Lisp.NIL)
il.EmitNull();
else
il.Emit(OpCodes.Ldsfld, typeof(RuntimeOps).GetField("True"));
st.Push(typeof(System.Object));
}
else if (lval == Lisp.INST)
{
il.Emit(OpCodes.Ldarg_0);
il.EmitPropertyGet(typeof(CompiledLambda), "Engine");
st.Push(typeof(Executive));
}
else if (lval == Lisp.ARGV)
{
il.Emit(OpCodes.Ldarg_2);
st.Push(typeof(object[]));
}
else if (lval == Lisp.MPOOL)
{
il.Emit(OpCodes.Ldarg_3);
st.Push(typeof(MemoryPool));
}
else
{
LocalBuilder localVar = locals.GetLocal(lval);
if (localVar != null)
{
il.Emit(OpCodes.Ldloc, localVar);
st.Push(localVar.LocalType);
}
else
{
Type type = lval.GetType();
if (type == typeof(Integer))
{
il.EmitDecimal((Decimal)((Integer)lval));
il.EmitNew(typeof(Integer).GetConstructor(BindingFlags.Instance | BindingFlags.NonPublic, null,
new Type[] { typeof(Decimal) }, null));
}
else if (!il.TryEmitConstant(lval, type))
{
il.Emit(OpCodes.Ldarg_1);
il.EmitInt(locals.DefineConstant(lval));
il.Emit(OpCodes.Ldelem_Ref);
if (type.IsValueType)
il.EmitUnbox(type);
}
st.Push(type);
}
}
}
else if (Lisp.IsFunctor(lval))
{
object head = Lisp.Car(lval);
object[] args = Lisp.ToArray(Lisp.Cdr(lval));
ControlFormBase control;
if (m_control.TryGetValue(head, out control))
control.Compile(this, lval, il, locals, st, args);
else
{
foreach (object a in args)
CompileExpr(il, locals, st, a);
Type[] parameterTypes = new Type[args.Length];
for (int k = args.Length - 1; k >= 0; k--)
parameterTypes[k] = st.Pop();
FuncName name = new FuncName(head, parameterTypes);
FuncBase body = GetFunc(name, false);
if (body == null)
{
bool successed = false;
if (parameterTypes.Length == 2)
{
Type castType = ValueProxy.GetType(parameterTypes[0], parameterTypes[1]);
ValueConverter converter1 = FindConverter(parameterTypes[0], castType);
ValueConverter converter2 = FindConverter(parameterTypes[1], castType);
body = GetFunc(new FuncName(name.ID, new Type[] { castType, castType }), false);
if (body != null && converter1 != null && converter2 != null)
{
LocalBuilder localVar = il.DeclareLocal(parameterTypes[1]);
il.Emit(OpCodes.Stloc, localVar);
converter1.Compile(this, il, locals, parameterTypes[0]);
il.Emit(OpCodes.Ldloc, localVar);
il.FreeLocal(localVar);
converter2.Compile(this, il, locals, parameterTypes[1]);
successed = true;
}
}
if (!successed)
{
body = GetFunc(name, true);
if (body == null)
throw new UnknownFuncCall(name.ToString());
else
{
LocalBuilder[] localVar = new LocalBuilder[parameterTypes.Length];
for (int k = localVar.Length - 1; k >= 0; k--)
{
localVar[k] = il.DeclareLocal(parameterTypes[k]);
il.Emit(OpCodes.Stloc, localVar[k]);
}
Type[] new_parameter_types = new Type[parameterTypes.Length];
for (int k = 0; k < localVar.Length; k++)
{
il.Emit(OpCodes.Ldloc, localVar[k]);
if (body.Name.GetParameterType(k) != parameterTypes[k])
{
if (parameterTypes[k].IsValueType)
il.EmitBoxing(parameterTypes[k]);
else if (ValueProxy.IsProxyType(parameterTypes[k]))
il.EmitPropertyGet(typeof(ValueProxy), "Value");
new_parameter_types[k] = typeof(System.Object);
}
else
new_parameter_types[k] = parameterTypes[k];
il.FreeLocal(localVar[k]);
}
parameterTypes = new_parameter_types;
}
}
}
Type resType = body.Compile(this, il, locals, parameterTypes);
if (resType == typeof(System.Boolean))
{ // Implict boolean convertion
Label l_false = il.DefineLabel();
Label end = il.DefineLabel();
il.Emit(OpCodes.Brfalse_S, l_false);
il.Emit(OpCodes.Ldsfld, typeof(RuntimeOps).GetField("True"));
il.Emit(OpCodes.Br_S, end);
il.MarkLabel(l_false);
il.EmitNull();
il.MarkLabel(end);
st.Push(typeof(System.Object));
}
else if (resType == typeof(void))
{ // assume that all procedures returns t
il.Emit(OpCodes.Ldsfld, typeof(RuntimeOps).GetField("True"));
st.Push(typeof(System.Object));
}
else
st.Push(resType);
}
}
else
if (Lisp.IsFunctor(Lisp.Car(lval), Lisp.LAMBDA))
{
object form = Lisp.Car(lval);
object body = Lisp.Car(Lisp.Cddr(form));
object tail = Lisp.Cdr(lval);
LambdaExpr lambda = new LambdaExpr(null, CreateParameters(Lisp.Arg1(form)),
typeof(System.Object), body);
List<Type> parameterTypesList = new List<Type>();
foreach (object a in Lisp.getIterator(tail))
{
CompileExpr(il, locals, st, a);
parameterTypesList.Add(st.Pop());
}
Type[] parameterTypes = parameterTypesList.ToArray();
FuncName name = new FuncName(null, parameterTypes);
if (!lambda.Name.Match(name, true))
throw new InvalidOperationException("Lambda parameters does not match");
st.Push(lambda.Compile(this, il, locals, parameterTypes));
}
else
throw new ArgumentException("Unproperly formated expression");
}
private FuncBase GetFunc(FuncName name, bool anyType)
{
FuncDef def;
if (m_func.TryGetValue(name.ID, out def))
return def.FindMatched(name, anyType);
else
throw new UnknownFuncCall(name.ToString());
}