public static StackValue Coerce(StackValue sv, Type targetType, RuntimeCore runtimeCore)
{
ProtoCore.Runtime.RuntimeMemory rmem = runtimeCore.RuntimeMemory;
//@TODO(Jun): FIX ME - abort coersion for default args
if (sv.IsDefaultArgument)
return sv;
if (!(
sv.metaData.type == targetType.UID ||
(runtimeCore.DSExecutable.classTable.ClassNodes[sv.metaData.type].ConvertibleTo(targetType.UID))
|| sv.IsArray))
{
runtimeCore.RuntimeStatus.LogWarning(Runtime.WarningID.kConversionNotPossible, Resources.kConvertNonConvertibleTypes);
return StackValue.Null;
}
//if it's an array
if (sv.IsArray && !targetType.IsIndexable)
{
//This is an array rank reduction
//this may only be performed in recursion and is illegal here
string errorMessage = String.Format(Resources.kConvertArrayToNonArray, runtimeCore.DSExecutable.TypeSystem.GetType(targetType.UID));
runtimeCore.RuntimeStatus.LogWarning(Runtime.WarningID.kConversionNotPossible, errorMessage);
return StackValue.Null;
}
if (sv.IsArray &&
targetType.IsIndexable)
{
Validity.Assert(sv.IsArray);
//We're being asked to convert an array into an array
//walk over the structure converting each othe elements
//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 != Constants.kArbitraryRank)
{
newTargetType.rank = targetType.rank - 1;
}
else
{
if (ArrayUtils.GetMaxRankForArray(sv, runtimeCore) == 1)
{
//Last unpacking
newTargetType.rank = 0;
}
else
{
newTargetType.rank = Constants.kArbitraryRank;
}
}
var array = runtimeCore.Heap.ToHeapObject<DSArray>(sv);
return array.CopyArray(newTargetType, runtimeCore);
}
if (!sv.IsArray && !sv.IsNull &&
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.Name = targetType.Name;
newTargetType.rank = 0;
//Upcast once
StackValue coercedValue = Coerce(sv, newTargetType, runtimeCore);
StackValue newSv = rmem.Heap.AllocateArray(new StackValue[] { coercedValue });
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.Name = targetType.Name;
newTargetType.rank = targetType.rank - 1;
//Upcast once
StackValue coercedValue = Coerce(sv, newTargetType, runtimeCore);
StackValue newSv = rmem.Heap.AllocateArray(new StackValue[] { coercedValue });
return newSv;
}
}
if (sv.IsPointer)
{
StackValue ret = ClassCoerece(sv, targetType, runtimeCore);
return ret;
}
//If it's anything other than array, just create a new copy
switch (targetType.UID)
{
case (int)PrimitiveType.kInvalidType:
runtimeCore.RuntimeStatus.LogWarning(Runtime.WarningID.kInvalidType, Resources.kInvalidType);
return StackValue.Null;
case (int)PrimitiveType.kTypeBool:
return sv.ToBoolean(runtimeCore);
case (int)PrimitiveType.kTypeChar:
{
StackValue newSV = sv.ShallowClone();
newSV.metaData = new MetaData { type = (int)PrimitiveType.kTypeChar };
return newSV;
}
case (int)PrimitiveType.kTypeDouble:
return sv.ToDouble();
case (int)PrimitiveType.kTypeFunctionPointer:
if (sv.metaData.type != (int)PrimitiveType.kTypeFunctionPointer)
{
runtimeCore.RuntimeStatus.LogWarning(Runtime.WarningID.kTypeMismatch, Resources.kFailToConverToFunction);
return StackValue.Null;
}
return sv;
case (int)PrimitiveType.kTypeInt:
{
if (sv.metaData.type == (int)PrimitiveType.kTypeDouble)
{
//TODO(lukechurch): Once the API is improved (MAGN-5174)
//Replace this with a log entry notification
//core.RuntimeStatus.LogWarning(RuntimeData.WarningID.kTypeConvertionCauseInfoLoss, Resources.kConvertDoubleToInt);
}
return sv.ToInteger();
}
case (int)PrimitiveType.kTypeNull:
{
if (sv.metaData.type != (int)PrimitiveType.kTypeNull)
{
runtimeCore.RuntimeStatus.LogWarning(Runtime.WarningID.kTypeMismatch, Resources.kFailToConverToNull);
return StackValue.Null;
}
return sv;
}
case (int)PrimitiveType.kTypePointer:
{
if (sv.metaData.type != (int)PrimitiveType.kTypeNull)
{
runtimeCore.RuntimeStatus.LogWarning(Runtime.WarningID.kTypeMismatch, Resources.kFailToConverToPointer);
return StackValue.Null;
}
return sv;
}
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 = EncodingUtils.ConvertInt64ToCharacter(newSV.opdata);
newSV = StackValue.BuildString(ch.ToString(), rmem.Heap);
}
return newSV;
}
case (int)PrimitiveType.kTypeVar:
{
return sv;
}
case (int)PrimitiveType.kTypeArray:
{
var array = runtimeCore.Heap.ToHeapObject<DSArray>(sv);
return array.CopyArray(targetType, runtimeCore);
}
default:
if (sv.IsNull)
return StackValue.Null;
else
throw new NotImplementedException("Requested coercion not implemented");
}
throw new NotImplementedException("Requested coercion not implemented");
}