public static StackValue Coerce(StackValue sv, Type targetType, Core core)
{
//@TODO(Jun): FIX ME - abort coersion for default args
if (sv.optype == AddressType.DefaultArg)
return sv;
if ( !(
(int)sv.metaData.type == targetType.UID ||
(core.DSExecutable.classTable.ClassNodes[(int)sv.metaData.type].ConvertibleTo(targetType.UID))
|| sv.optype == AddressType.ArrayPointer))
{
core.RuntimeStatus.LogWarning(RuntimeData.WarningID.kConversionNotPossible, ProtoCore.RuntimeData.WarningMessage.kConvertNonConvertibleTypes);
return StackUtils.BuildNull();
}
//if it's an array
if (sv.optype == AddressType.ArrayPointer && !targetType.IsIndexable && targetType.rank != DSASM.Constants.kUndefinedRank)// && targetType.UID != (int)PrimitiveType.kTypeVar)
{
//This is an array rank reduction
//this may only be performed in recursion and is illegal here
string errorMessage = String.Format(ProtoCore.RuntimeData.WarningMessage.kConvertArrayToNonArray, core.TypeSystem.GetType(targetType.UID));
core.RuntimeStatus.LogWarning(RuntimeData.WarningID.kConversionNotPossible, errorMessage);
return StackUtils.BuildNull();
}
if (sv.optype == AddressType.ArrayPointer && targetType.IsIndexable)
{
Validity.Assert(ArrayUtils.IsArray(sv));
//We're being asked to convert an array into an array
//walk over the structure converting each othe elements
if (targetType.UID == (int)PrimitiveType.kTypeVar && targetType.rank == DSASM.Constants.kArbitraryRank && core.Heap.IsTemporaryPointer(sv))
{
return sv;
}
HeapElement he = core.Heap.Heaplist[(int)sv.opdata];
StackValue[] newSubSVs = new StackValue[he.VisibleSize];
//Validity.Assert(targetType.rank != -1, "Arbitrary rank array conversion not yet implemented {2EAF557F-62DE-48F0-9BFA-F750BBCDF2CB}");
//Decrease level of reductions by one
Type newTargetType = new Type();
newTargetType.UID = targetType.UID;
if (targetType.rank != ProtoCore.DSASM.Constants.kArbitraryRank)
{
newTargetType.rank = targetType.rank - 1;
newTargetType.IsIndexable = newTargetType.rank > 0;
}
else
{
if (ArrayUtils.GetMaxRankForArray(sv, core) == 1)
{
//Last unpacking
newTargetType.rank = 0;
newTargetType.IsIndexable = false;
}
else
{
newTargetType.rank = ProtoCore.DSASM.Constants.kArbitraryRank;
newTargetType.IsIndexable = true;
}
}
for (int i = 0; i < he.VisibleSize; i++)
{
StackValue coercedValue = Coerce(he.Stack[i], newTargetType, core);
GCUtils.GCRetain(coercedValue, core);
newSubSVs[i] = coercedValue;
}
StackValue newSV = HeapUtils.StoreArray(newSubSVs, core);
return newSV;
}
if (sv.optype != AddressType.ArrayPointer && sv.optype != AddressType.Null &&
targetType.IsIndexable &&
targetType.rank != DSASM.Constants.kArbitraryRank)
{
//We're being asked to promote the value into an array
if (targetType.rank == 1)
{
Type newTargetType = new Type();
newTargetType.UID = targetType.UID;
newTargetType.IsIndexable = false;
newTargetType.Name = targetType.Name;
newTargetType.rank = 0;
//Upcast once
StackValue coercedValue = Coerce(sv, newTargetType, core);
GCUtils.GCRetain(coercedValue, core);
StackValue newSv = HeapUtils.StoreArray(new StackValue[] { coercedValue }, core);
return newSv;
}
else
{
Validity.Assert(targetType.rank > 1, "Target rank should be greater than one for this clause");
Type newTargetType = new Type();
newTargetType.UID = targetType.UID;
newTargetType.IsIndexable = true;
newTargetType.Name = targetType.Name;
newTargetType.rank = targetType.rank -1;
//Upcast once
StackValue coercedValue = Coerce(sv, newTargetType, core);
GCUtils.GCRetain(coercedValue, core);
StackValue newSv = HeapUtils.StoreArray(new StackValue[] { coercedValue }, core);
return newSv;
}
}
if (sv.optype == AddressType.Pointer)
{
StackValue ret = ClassCoerece(sv, targetType, core);
return ret;
}
//If it's anything other than array, just create a new copy
switch (targetType.UID)
{
case (int)PrimitiveType.kInvalidType:
Validity.Assert(false, "Can't convert invalid type");
break;
case (int)PrimitiveType.kTypeBool:
return sv.AsBoolean(core);
case (int)PrimitiveType.kTypeChar:
{
StackValue newSV = sv.ShallowClone();
newSV.metaData = new MetaData { type = (int)PrimitiveType.kTypeChar };
return newSV;
}
case (int)PrimitiveType.kTypeDouble:
return sv.AsDouble();
case (int)PrimitiveType.kTypeFunctionPointer:
if (sv.metaData.type != (int)PrimitiveType.kTypeFunctionPointer)
{
core.RuntimeStatus.LogWarning(RuntimeData.WarningID.kTypeMismatch, ProtoCore.RuntimeData.WarningMessage.kFailToConverToFunction);
return StackUtils.BuildNull();
}
return sv.ShallowClone();
case (int)PrimitiveType.kTypeHostEntityID:
{
StackValue newSV = sv.ShallowClone();
newSV.metaData = new MetaData { type = (int)PrimitiveType.kTypeHostEntityID };
return newSV;
}
case (int)PrimitiveType.kTypeInt:
{
if (sv.metaData.type == (int)PrimitiveType.kTypeDouble)
{
core.RuntimeStatus.LogWarning(RuntimeData.WarningID.kTypeConvertionCauseInfoLoss, ProtoCore.RuntimeData.WarningMessage.kConvertDoubleToInt);
}
return sv.AsInt();
}
case (int)PrimitiveType.kTypeNull:
{
if (sv.metaData.type != (int)PrimitiveType.kTypeNull)
{
core.RuntimeStatus.LogWarning(RuntimeData.WarningID.kTypeMismatch, ProtoCore.RuntimeData.WarningMessage.kFailToConverToNull);
return StackUtils.BuildNull();
}
return sv.ShallowClone();
}
case (int)PrimitiveType.kTypePointer:
{
if (sv.metaData.type != (int)PrimitiveType.kTypeNull)
{
core.RuntimeStatus.LogWarning(RuntimeData.WarningID.kTypeMismatch, ProtoCore.RuntimeData.WarningMessage.kFailToConverToPointer);
return StackUtils.BuildNull();
}
StackValue ret = sv.ShallowClone();
return ret;
}
case (int)PrimitiveType.kTypeString:
{
StackValue newSV = sv.ShallowClone();
newSV.metaData = new MetaData { type = (int)PrimitiveType.kTypeString };
if (sv.metaData.type == (int)PrimitiveType.kTypeChar)
{
char ch = ProtoCore.Utils.EncodingUtils.ConvertInt64ToCharacter(newSV.opdata);
newSV = StackUtils.BuildString(ch.ToString(), core.Heap);
}
return newSV;
}
case (int)PrimitiveType.kTypeVar:
{
return sv;
}
case (int)PrimitiveType.kTypeArray:
{
HeapElement he = core.Heap.Heaplist[(int)sv.opdata];
StackValue[] newSubSVs = new StackValue[he.VisibleSize];
for (int i = 0; i < he.VisibleSize; i++)
{
StackValue coercedValue = Coerce(he.Stack[i], targetType, core);
GCUtils.GCRetain(coercedValue, core);
newSubSVs[i] = coercedValue;
}
StackValue newSV = HeapUtils.StoreArray(newSubSVs, core);
return newSV;
}
default:
if (sv.optype == AddressType.Null)
return StackUtils.BuildNull();
else
throw new NotImplementedException("Requested coercion not implemented");
}
throw new NotImplementedException("Requested coercion not implemented");
}