private static bool AdjustValueStandard(Type operandType, object operandValue, Type toType, out object converted)
{
// assume it's the same for now
converted = operandValue;
// check for null
if (operandValue == null)
{
// are we converting to a value type?
if (toType.IsValueType)
{
// is the conversion to nullable?
if (!ConditionHelper.IsNullableValueType(toType))
{
// value type and null, so no conversion possible
string message = string.Format(CultureInfo.CurrentCulture, Messages.CannotCastNullToValueType, RuleDecompiler.DecompileType(toType));
throw new InvalidCastException(message);
}
// here we have a Nullable<T>
// however, we may need to call the implicit conversion operator if the types are not compatible
converted = Activator.CreateInstance(toType);
return(RuleValidation.StandardImplicitConversion(operandType, toType, null, out ValidationError error));
}
// not a value type, so null is valid
return(true);
}
// check simple cases
Type currentType = operandValue.GetType();
if (currentType == toType)
{
return(true);
}
// now the fun begins
// this should handle most class conversions
if (toType.IsAssignableFrom(currentType))
{
return(true);
}
// handle the numerics (both implicit and explicit), along with nullable
// note that if the value was null, it's already handled, so value cannot be nullable
if ((currentType.IsValueType) && (toType.IsValueType))
{
if (currentType.IsEnum)
{
// strip off the enum representation
currentType = Enum.GetUnderlyingType(currentType);
ArithmeticLiteral literal = ArithmeticLiteral.MakeLiteral(currentType, operandValue);
operandValue = literal.Value;
}
bool resultNullable = ConditionHelper.IsNullableValueType(toType);
Type resultType = (resultNullable) ? Nullable.GetUnderlyingType(toType) : toType;
if (resultType.IsEnum)
{
// Enum.ToObject may throw if currentType is not type SByte,
// Int16, Int32, Int64, Byte, UInt16, UInt32, or UInt64.
// So we adjust currentValue to the underlying type (which may throw if out of range)
Type underlyingType = Enum.GetUnderlyingType(resultType);
if (AdjustValueStandard(currentType, operandValue, underlyingType, out object adjusted))
{
converted = Enum.ToObject(resultType, adjusted);
if (resultNullable)
{
converted = Activator.CreateInstance(toType, converted);
}
return(true);
}
}
else if ((resultType.IsPrimitive) || (resultType == typeof(decimal)))
{
// resultType must be a primitive to continue (not a struct)
// (enums and generics handled above)
if (currentType == typeof(char))
{
char c = (char)operandValue;
if (resultType == typeof(float))
{
converted = (float)c;
}
else if (resultType == typeof(double))
{
converted = (double)c;
}
else if (resultType == typeof(decimal))
{
converted = (decimal)c;
}
else
{
converted = ((IConvertible)c).ToType(resultType, CultureInfo.CurrentCulture);
}
if (resultNullable)
{
converted = Activator.CreateInstance(toType, converted);
}
return(true);
}
else if (currentType == typeof(float))
{
float f = (float)operandValue;
if (resultType == typeof(char))
{
converted = (char)f;
}
else
{
converted = ((IConvertible)f).ToType(resultType, CultureInfo.CurrentCulture);
}
if (resultNullable)
{
converted = Activator.CreateInstance(toType, converted);
}
return(true);
}
else if (currentType == typeof(double))
{
double d = (double)operandValue;
if (resultType == typeof(char))
{
converted = (char)d;
}
else
{
converted = ((IConvertible)d).ToType(resultType, CultureInfo.CurrentCulture);
}
if (resultNullable)
{
converted = Activator.CreateInstance(toType, converted);
}
return(true);
}
else if (currentType == typeof(decimal))
{
decimal d = (decimal)operandValue;
if (resultType == typeof(char))
{
converted = (char)d;
}
else
{
converted = ((IConvertible)d).ToType(resultType, CultureInfo.CurrentCulture);
}
if (resultNullable)
{
converted = Activator.CreateInstance(toType, converted);
}
return(true);
}
else
{
if (operandValue is IConvertible convert)
{
try
{
converted = convert.ToType(resultType, CultureInfo.CurrentCulture);
if (resultNullable)
{
converted = Activator.CreateInstance(toType, converted);
}
return(true);
}
catch (InvalidCastException)
{
// not IConvertable, so can't do it
return(false);
}
}
}
}
}
// no luck with standard conversions, so no conversion done
return(false);
}
internal override RuleExpressionInfo Validate(CodeExpression expression, RuleValidation validation, bool isWritten)
{
CodeArrayCreateExpression newParent = (CodeArrayCreateExpression)expression;
if (isWritten)
{
ValidationError item = new ValidationError(string.Format(CultureInfo.CurrentCulture, Messages.CannotWriteToExpression, new object[] { typeof(CodeObjectCreateExpression).ToString() }), 0x17a);
item.UserData["ErrorObject"] = newParent;
validation.Errors.Add(item);
return(null);
}
if (newParent.CreateType == null)
{
ValidationError error2 = new ValidationError(Messages.NullTypeType, 0x53d);
error2.UserData["ErrorObject"] = newParent;
validation.Errors.Add(error2);
return(null);
}
Type lhsType = validation.ResolveType(newParent.CreateType);
if (lhsType == null)
{
return(null);
}
if (lhsType.IsArray)
{
ValidationError error3 = new ValidationError(string.Format(CultureInfo.CurrentCulture, Messages.ArrayTypeInvalid, new object[] { lhsType.Name }), 0x53d);
error3.UserData["ErrorObject"] = newParent;
validation.Errors.Add(error3);
return(null);
}
try
{
if (!validation.PushParentExpression(newParent))
{
return(null);
}
if (newParent.Size < 0)
{
ValidationError error4 = new ValidationError(Messages.ArraySizeInvalid, 0x53d);
error4.UserData["ErrorObject"] = newParent;
validation.Errors.Add(error4);
return(null);
}
if (newParent.SizeExpression != null)
{
RuleExpressionInfo info = RuleExpressionWalker.Validate(validation, newParent.SizeExpression, false);
if (info == null)
{
return(null);
}
if (((info.ExpressionType != typeof(int)) && (info.ExpressionType != typeof(uint))) && ((info.ExpressionType != typeof(long)) && (info.ExpressionType != typeof(ulong))))
{
ValidationError error5 = new ValidationError(string.Format(CultureInfo.CurrentCulture, Messages.ArraySizeTypeInvalid, new object[] { info.ExpressionType.Name }), 0x53d);
error5.UserData["ErrorObject"] = newParent;
validation.Errors.Add(error5);
return(null);
}
}
bool flag = false;
for (int i = 0; i < newParent.Initializers.Count; i++)
{
CodeExpression expression3 = newParent.Initializers[i];
if (expression3 == null)
{
ValidationError error6 = new ValidationError(string.Format(CultureInfo.CurrentCulture, Messages.MissingInitializer, new object[] { lhsType.Name }), 0x53d);
error6.UserData["ErrorObject"] = newParent;
validation.Errors.Add(error6);
return(null);
}
RuleExpressionInfo info2 = RuleExpressionWalker.Validate(validation, expression3, false);
if (info2 == null)
{
flag = true;
}
else
{
ValidationError error7;
if (!RuleValidation.StandardImplicitConversion(info2.ExpressionType, lhsType, expression3, out error7))
{
if (error7 != null)
{
error7.UserData["ErrorObject"] = newParent;
validation.Errors.Add(error7);
}
error7 = new ValidationError(string.Format(CultureInfo.CurrentCulture, Messages.InitializerMismatch, new object[] { i, lhsType.Name }), 0x545);
error7.UserData["ErrorObject"] = newParent;
validation.Errors.Add(error7);
return(null);
}
}
}
if (flag)
{
return(null);
}
double size = -1.0;
if (newParent.SizeExpression != null)
{
CodePrimitiveExpression sizeExpression = newParent.SizeExpression as CodePrimitiveExpression;
if ((sizeExpression != null) && (sizeExpression.Value != null))
{
size = (double)Executor.AdjustType(sizeExpression.Value.GetType(), sizeExpression.Value, typeof(double));
}
if (newParent.Size > 0)
{
ValidationError error8 = new ValidationError(Messages.ArraySizeBoth, 0x53d);
error8.UserData["ErrorObject"] = newParent;
validation.Errors.Add(error8);
return(null);
}
}
else if (newParent.Size > 0)
{
size = newParent.Size;
}
if ((size >= 0.0) && (newParent.Initializers.Count > size))
{
ValidationError error9 = new ValidationError(string.Format(CultureInfo.CurrentCulture, Messages.InitializerCountMismatch, new object[] { newParent.Initializers.Count, size }), 0x545);
error9.UserData["ErrorObject"] = newParent;
validation.Errors.Add(error9);
return(null);
}
}
finally
{
validation.PopParentExpression();
}
return(new RuleExpressionInfo(lhsType.MakeArrayType()));
}
private static bool AdjustValueStandard(Type operandType, object operandValue, Type toType, out object converted)
{
converted = operandValue;
if (operandValue == null)
{
ValidationError error;
if (!toType.IsValueType)
{
return(true);
}
if (!ConditionHelper.IsNullableValueType(toType))
{
throw new InvalidCastException(string.Format(CultureInfo.CurrentCulture, Messages.CannotCastNullToValueType, new object[] { RuleDecompiler.DecompileType(toType) }));
}
converted = Activator.CreateInstance(toType);
return(RuleValidation.StandardImplicitConversion(operandType, toType, null, out error));
}
Type c = operandValue.GetType();
if (c == toType)
{
return(true);
}
if (toType.IsAssignableFrom(c))
{
return(true);
}
if (c.IsValueType && toType.IsValueType)
{
if (c.IsEnum)
{
c = Enum.GetUnderlyingType(c);
operandValue = ArithmeticLiteral.MakeLiteral(c, operandValue).Value;
}
bool flag = ConditionHelper.IsNullableValueType(toType);
Type enumType = flag ? Nullable.GetUnderlyingType(toType) : toType;
if (enumType.IsEnum)
{
object obj2;
Type underlyingType = Enum.GetUnderlyingType(enumType);
if (AdjustValueStandard(c, operandValue, underlyingType, out obj2))
{
converted = Enum.ToObject(enumType, obj2);
if (flag)
{
converted = Activator.CreateInstance(toType, new object[] { converted });
}
return(true);
}
}
else if (enumType.IsPrimitive || (enumType == typeof(decimal)))
{
if (c == typeof(char))
{
char ch = (char)operandValue;
if (enumType == typeof(float))
{
converted = (float)ch;
}
else if (enumType == typeof(double))
{
converted = (double)ch;
}
else if (enumType == typeof(decimal))
{
converted = ch;
}
else
{
converted = ((IConvertible)ch).ToType(enumType, CultureInfo.CurrentCulture);
}
if (flag)
{
converted = Activator.CreateInstance(toType, new object[] { converted });
}
return(true);
}
if (c == typeof(float))
{
float num = (float)operandValue;
if (enumType == typeof(char))
{
converted = (char)((ushort)num);
}
else
{
converted = ((IConvertible)num).ToType(enumType, CultureInfo.CurrentCulture);
}
if (flag)
{
converted = Activator.CreateInstance(toType, new object[] { converted });
}
return(true);
}
if (c == typeof(double))
{
double num2 = (double)operandValue;
if (enumType == typeof(char))
{
converted = (char)((ushort)num2);
}
else
{
converted = ((IConvertible)num2).ToType(enumType, CultureInfo.CurrentCulture);
}
if (flag)
{
converted = Activator.CreateInstance(toType, new object[] { converted });
}
return(true);
}
if (c == typeof(decimal))
{
decimal num3 = (decimal)operandValue;
if (enumType == typeof(char))
{
converted = (char)num3;
}
else
{
converted = ((IConvertible)num3).ToType(enumType, CultureInfo.CurrentCulture);
}
if (flag)
{
converted = Activator.CreateInstance(toType, new object[] { converted });
}
return(true);
}
IConvertible convertible = operandValue as IConvertible;
if (convertible != null)
{
try
{
converted = convertible.ToType(enumType, CultureInfo.CurrentCulture);
if (flag)
{
converted = Activator.CreateInstance(toType, new object[] { converted });
}
return(true);
}
catch (InvalidCastException)
{
return(false);
}
}
}
}
return(false);
}