private Mapping <ConstantHandle> MapConstantImpl(ConstantHandle handle)
{
Constant constant = _sourceMetadata.GetConstant(handle);
Mapping <Handle> parent = MapHandle(constant.Parent);
if (parent.Target.IsNil)
{
return(new Mapping <ConstantHandle>());
}
ConstantHandle targetHandle;
switch (parent.Target.Kind)
{
case HandleKind.Parameter:
Parameter targetParameter = _targetMetadata.GetParameter((ParameterHandle)parent.Target);
targetHandle = targetParameter.GetDefaultValue();
break;
case HandleKind.FieldDefinition:
FieldDefinition targetFieldDefinition = _targetMetadata.GetFieldDefinition((FieldDefinitionHandle)parent.Target);
targetHandle = targetFieldDefinition.GetDefaultValue();
break;
case HandleKind.PropertyDefinition:
PropertyDefinition targetPropertyDefinition = _targetMetadata.GetPropertyDefinition((PropertyDefinitionHandle)parent.Target);
targetHandle = targetPropertyDefinition.GetDefaultValue();
break;
default:
throw new InvalidOperationException();
}
if (targetHandle.IsNil)
{
return(new Mapping <ConstantHandle>());
}
Constant targetConstant = _targetMetadata.GetConstant(targetHandle);
if (constant.TypeCode != targetConstant.TypeCode)
{
var candidateTargets = ImmutableArray.Create(targetHandle);
var candidateReasons = ImmutableArray.Create("Mapped constant has a different type.");
return(new Mapping <ConstantHandle>(candidateTargets, candidateReasons));
}
ImmutableArray <byte> sourceContent = _sourceMetadata.GetBlobContent(constant.Value);
ImmutableArray <byte> targetContent = _targetMetadata.GetBlobContent(targetConstant.Value);
if (!sourceContent.SequenceEqual(targetContent))
{
var candidateTargets = ImmutableArray.Create(targetHandle);
var candidateReasons = ImmutableArray.Create("Mapped constant has a different value.");
return(new Mapping <ConstantHandle>(candidateTargets, candidateReasons));
}
return(new Mapping <ConstantHandle>(targetHandle));
}
public static bool GetDefaultValueIfAny(MetadataReader reader, ref PropertyDefinition property, PropertyInfo propertyInfo, bool raw, out object defaultValue)
{
if (0 != (property.Attributes & PropertyAttributes.HasDefault))
{
defaultValue = ConstantValueAsObject(property.GetDefaultValue(), reader, propertyInfo.PropertyType, raw);
return(true);
}
else
{
// Custom attributes default values cannot be specified on properties
defaultValue = null;
return(false);
}
}
protected sealed override object ComputeRawConstantValue() => PropertyDefinition.GetDefaultValue().ToRawObject(Reader);
private CilConstant GetDefaultValue()
{
Constant constant = _readers.MdReader.GetConstant(_propertyDef.GetDefaultValue());
return(CilConstant.Create(constant, ref _readers));
}
