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Fix nullable struct serialization #621

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merged 1 commit into from
Jun 28, 2021
Merged

Fix nullable struct serialization #621

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5 changes: 5 additions & 0 deletions YamlDotNet.Test/Serialization/SerializationTestHelper.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -141,6 +141,11 @@ public enum EnumExample
Two
}

public struct StructExample
{
public int Value { get; set; }
}

public enum SByteEnum : sbyte { Default, Sbyte }
public enum ByteEnum : byte { Default, Byte }
public enum Int16Enum : short { Default, Short }
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18 changes: 18 additions & 0 deletions YamlDotNet.Test/Serialization/SerializationTests.cs
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Expand Up @@ -183,6 +183,24 @@ public void RoundtripNullableEnums(EnumExample? value)
result.Should().Be(value);
}

[Fact]
public void RoundtripNullableStructWithValue()
{
var value = new StructExample { Value = 2 };

var result = DoRoundtripFromObjectTo<StructExample?>(value);

result.Should().Be(value);
}

[Fact]
public void RoundtripNullableStructWithoutValue()
{
var result = DoRoundtripFromObjectTo<StructExample?>(null);

result.Should().Be(null);
}

[Fact]
public void SerializeCircularReference()
{
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7 changes: 5 additions & 2 deletions YamlDotNet/Serialization/NodeDeserializers/ObjectNodeDeserializer.cs
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Expand Up @@ -47,11 +47,14 @@ bool INodeDeserializer.Deserialize(IParser parser, Type expectedType, Func<IPars
return false;
}

value = objectFactory.Create(expectedType);
// Strip off the nullable type, if present. This is needed for nullable structs.
var implementationType = Nullable.GetUnderlyingType(expectedType) ?? expectedType;

value = objectFactory.Create(implementationType);
while (!parser.TryConsume<MappingEnd>(out var _))
{
var propertyName = parser.Consume<Scalar>();
var property = typeDescriptor.GetProperty(expectedType, null, propertyName.Value, ignoreUnmatched);
var property = typeDescriptor.GetProperty(implementationType, null, propertyName.Value, ignoreUnmatched);
if (property == null)
{
parser.SkipThisAndNestedEvents();
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