/// <summary>Deserializes a value type from a <see cref="DbEntry"/> instance
/// using a specific <see cref="Field{T, F}"/> instance.</summary>
/// <remarks>Passing the value type by reference avoids copy overhead.</remarks>
/// <typeparam name="T">Value type to deserialize.</typeparam>
/// <param name="value">Struct instance to deserialize.</param>
/// <param name="isNull">Returns <c>true</c> if a <c>null</c> is deserialized,
/// in which case the <c>value</c> parameter is ignored.</param>
/// <param name="entry"><see cref="DbEntry"/> instance containing the serialized data.</param>
/// <param name="field"><see cref="ValueField{T, Formatter}"/> instance that
/// deserializes the <c>entry</c>argument.</param>
public void FromDbEntry <T>(ref T value, out bool isNull, ref DbEntry entry, ValueField <T, Formatter> field)
where T : struct
{
int index = entry.Start;
InitDeserialization(entry.Buffer, index);
field.Deserialize(ref value, out isNull);
index = FinishDeserialization();
}
/// <overloads>Deserializes an object graph from a <see cref="DbEntry"/> instance.</overloads>
/// <summary>Deserializes a nullable value type from a <see cref="DbEntry"/> instance
/// using a specific <see cref="Field{T, F}"/> instance.</summary>
/// <typeparam name="T">Value type to deserialize.</typeparam>
/// <param name="entry"><see cref="DbEntry"/> instance containing the serialized data.</param>
/// <param name="field"><see cref="ValueField{T, Formatter}"/> instance that
/// deserializes the <c>entry</c>argument.</param>
/// <returns>Deserialized struct instance, or <c>null</c>.</returns>
public T?FromDbEntry <T>(ref DbEntry entry, ValueField <T, Formatter> field)
where T : struct
{
int index = entry.Start;
InitDeserialization(entry.Buffer, index);
T?result = field.Deserialize();
index = FinishDeserialization();
return(result);
}
