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503 lines
22 KiB
503 lines
22 KiB
using IPA.Config.Data;
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using IPA.Logging;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Reflection;
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using System.Reflection.Emit;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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using System.Linq.Expressions;
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using System.Runtime.CompilerServices;
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using System.IO;
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#if NET3
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using Net3_Proxy;
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using Array = Net3_Proxy.Array;
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#endif
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[assembly: InternalsVisibleTo(IPA.Config.Stores.GeneratedStore.GeneratedAssemblyName)]
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namespace IPA.Config.Stores
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{
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/// <summary>
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/// A class providing an extension for <see cref="Config"/> to make it easy to use generated
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/// config stores.
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/// </summary>
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public static class GeneratedStoreExtensions
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{
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/// <summary>
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/// Creates a generated <see cref="IConfigStore"/> of type <typeparamref name="T"/>, registers it to
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/// the <see cref="Config"/> object, and returns it. This also forces a synchronous config load via
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/// <see cref="Config.LoadSync"/> if <paramref name="loadSync"/> is <see langword="true"/>.
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/// </summary>
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/// <remarks>
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/// <para>
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/// <typeparamref name="T"/> must be a non-<see langword="sealed"/> <see langword="class"/>.
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/// </para>
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/// <para>
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/// TODO: describe details of generated stores
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/// </para>
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/// </remarks>
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/// <typeparam name="T">the type to wrap</typeparam>
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/// <param name="cfg">the <see cref="Config"/> to register to</param>
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/// <param name="loadSync">whether to synchronously load the content, or trigger an async load</param>
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/// <returns>a generated instance of <typeparamref name="T"/> as a special <see cref="IConfigStore"/></returns>
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public static T Generated<T>(this Config cfg, bool loadSync = true) where T : class
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{
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var ret = GeneratedStore.Create<T>();
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cfg.SetStore(ret as IConfigStore);
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if (loadSync)
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cfg.LoadSync();
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else
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cfg.LoadAsync();
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return ret;
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}
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}
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internal static class GeneratedStore
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{
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internal interface IGeneratedStore
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{
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/// <summary>
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/// serializes/deserializes to Value
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/// </summary>
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Value Values { get; set; }
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Type Type { get; }
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IGeneratedStore Parent { get; }
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Impl Impl { get; }
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}
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internal class Impl : IConfigStore
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{
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private IGeneratedStore generated;
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internal static ConstructorInfo Ctor = typeof(Impl).GetConstructor(new[] { typeof(IGeneratedStore) });
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public Impl(IGeneratedStore store) => generated = store;
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private readonly AutoResetEvent resetEvent = new AutoResetEvent(false);
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public WaitHandle SyncObject => resetEvent;
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internal static MethodInfo SyncObjectGetMethod = typeof(Impl).GetProperty(nameof(SyncObject)).GetGetMethod();
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public ReaderWriterLockSlim WriteSyncObject { get; } = new ReaderWriterLockSlim();
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internal static MethodInfo WriteSyncObjectGetMethod = typeof(Impl).GetProperty(nameof(WriteSyncObject)).GetGetMethod();
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internal static MethodInfo ImplSignalChangedMethod = typeof(Impl).GetMethod(nameof(ImplSignalChanged));
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public static void ImplSignalChanged(IGeneratedStore s) => FindImpl(s).SignalChanged();
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public void SignalChanged() => resetEvent.Set();
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internal static MethodInfo ImplTakeReadMethod = typeof(Impl).GetMethod(nameof(ImplTakeRead));
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public static void ImplTakeRead(IGeneratedStore s) => FindImpl(s).TakeRead();
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public void TakeRead() => WriteSyncObject.EnterReadLock();
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internal static MethodInfo ImplReleaseReadMethod = typeof(Impl).GetMethod(nameof(ImplReleaseRead));
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public static void ImplReleaseRead(IGeneratedStore s) => FindImpl(s).ReleaseRead();
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public void ReleaseRead() => WriteSyncObject.ExitWriteLock();
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internal static MethodInfo ImplTakeWriteMethod = typeof(Impl).GetMethod(nameof(ImplTakeWrite));
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public static void ImplTakeWrite(IGeneratedStore s) => FindImpl(s).TakeWrite();
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public void TakeWrite() => WriteSyncObject.EnterWriteLock();
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internal static MethodInfo ImplReleaseWriteMethod = typeof(Impl).GetMethod(nameof(ImplReleaseWrite));
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public static void ImplReleaseWrite(IGeneratedStore s) => FindImpl(s).ReleaseWrite();
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public void ReleaseWrite() => WriteSyncObject.ExitWriteLock();
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internal static MethodInfo FindImplMethod = typeof(Impl).GetMethod(nameof(FindImpl));
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public static Impl FindImpl(IGeneratedStore store)
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{
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while (store?.Parent != null) store = store.Parent; // walk to the top of the tree
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return store?.Impl;
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}
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internal static MethodInfo ReadFromMethod = typeof(Impl).GetMethod(nameof(ReadFrom));
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public void ReadFrom(IConfigProvider provider)
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{
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// TODO: implement
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Logger.config.Debug("Generated impl ReadFrom");
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Logger.config.Debug($"Read {provider.Load()}");
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}
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internal static MethodInfo WriteToMethod = typeof(Impl).GetMethod(nameof(WriteTo));
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public void WriteTo(IConfigProvider provider)
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{
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var values = generated.Values;
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// TODO: implement
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Logger.config.Debug("Generated impl WriteTo");
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}
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}
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private static Dictionary<Type, Func<IGeneratedStore, IConfigStore>> generatedCreators = new Dictionary<Type, Func<IGeneratedStore, IConfigStore>>();
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private static Dictionary<Type, Dictionary<string, Type>> memberMaps = new Dictionary<Type, Dictionary<string, Type>>();
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public static T Create<T>() where T : class => (T)Create(typeof(T));
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public static IConfigStore Create(Type type) => Create(type, null);
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private static IConfigStore Create(Type type, IGeneratedStore parent)
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{
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if (generatedCreators.TryGetValue(type, out var creator))
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return creator(parent);
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else
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{
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creator = MakeCreator(type);
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generatedCreators.Add(type, creator);
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return creator(parent);
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}
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}
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internal const string GeneratedAssemblyName = "IPA.Config.Generated";
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private static AssemblyBuilder assembly = null;
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private static AssemblyBuilder Assembly
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{
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get
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{
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if (assembly == null)
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{
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var name = new AssemblyName(GeneratedAssemblyName);
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assembly = AppDomain.CurrentDomain.DefineDynamicAssembly(name, AssemblyBuilderAccess.RunAndSave);
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}
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return assembly;
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}
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}
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internal static void DebugSaveAssembly(string file)
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{
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Assembly.Save(file);
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}
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private static ModuleBuilder module = null;
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private static ModuleBuilder Module
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{
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get
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{
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if (module == null)
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module = Assembly.DefineDynamicModule(Assembly.GetName().Name, Assembly.GetName().Name + ".dll");
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return module;
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}
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}
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private struct SerializedMemberInfo
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{
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public string Name;
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public MemberInfo Member;
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public bool IsVirtual;
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public Type Type;
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}
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private static Func<IGeneratedStore, IConfigStore> MakeCreator(Type type)
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{
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var baseCtor = type.GetConstructor(Type.EmptyTypes); // get a default constructor
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if (baseCtor == null)
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throw new ArgumentException("Config type does not have a public parameterless constructor");
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var typeBuilder = Module.DefineType($"{type.FullName}.Generated",
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TypeAttributes.Public | TypeAttributes.Sealed | TypeAttributes.Class, type);
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var typeField = typeBuilder.DefineField("<>_type", typeof(Type), FieldAttributes.Private | FieldAttributes.InitOnly);
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var implField = typeBuilder.DefineField("<>_impl", typeof(Impl), FieldAttributes.Private | FieldAttributes.InitOnly);
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var parentField = typeBuilder.DefineField("<>_parent", typeof(IGeneratedStore), FieldAttributes.Private | FieldAttributes.InitOnly);
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var GetTypeFromHandle = typeof(Type).GetMethod(nameof(Type.GetTypeFromHandle));
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// TODO: possibly move all of this manual IL over to Linq.Expressions
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#region Parse base object structure
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var baseChanged = type.GetMethod("Changed", BindingFlags.Public | BindingFlags.Instance, null, Type.EmptyTypes, Array.Empty<ParameterModifier>());
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if (baseChanged != null && !baseChanged.IsVirtual) baseChanged = null; // limit this to just the one thing
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var structure = new Dictionary<string, SerializedMemberInfo>();
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// TODO: incorporate attributes
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// only looks at public properties
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foreach (var prop in type.GetProperties(BindingFlags.Instance | BindingFlags.Public))
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{
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var smi = new SerializedMemberInfo
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{
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Name = prop.Name,
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Member = prop,
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IsVirtual = (prop.GetGetMethod(true)?.IsVirtual ?? false) ||
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(prop.GetSetMethod(true)?.IsVirtual ?? false),
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Type = prop.PropertyType
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};
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structure.Add(smi.Name, smi);
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}
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// only look at public fields
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foreach (var field in type.GetFields(BindingFlags.Instance | BindingFlags.Public))
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{
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var smi = new SerializedMemberInfo
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{
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Name = field.Name,
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Member = field,
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IsVirtual = false,
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Type = field.FieldType
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};
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structure.Add(smi.Name, smi);
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}
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#endregion
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#region Constructor
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// takes its parent
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var ctor = typeBuilder.DefineConstructor(MethodAttributes.Public, CallingConventions.Standard, new[] { typeof(IGeneratedStore) });
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{
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var il = ctor.GetILGenerator();
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il.Emit(OpCodes.Ldarg_0); // keep this at bottom of stack
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il.Emit(OpCodes.Dup);
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il.Emit(OpCodes.Call, baseCtor);
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il.Emit(OpCodes.Dup);
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il.Emit(OpCodes.Ldarg_1); // load parent
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il.Emit(OpCodes.Stfld, parentField);
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il.Emit(OpCodes.Dup);
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il.Emit(OpCodes.Ldtoken, type);
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il.Emit(OpCodes.Call, GetTypeFromHandle); // effectively typeof(type)
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il.Emit(OpCodes.Stfld, typeField);
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il.Emit(OpCodes.Dup);
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il.Emit(OpCodes.Dup);
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il.Emit(OpCodes.Newobj, Impl.Ctor);
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il.Emit(OpCodes.Stfld, implField);
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foreach (var kvp in structure)
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EmitMemberFix(il, kvp.Value);
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il.Emit(OpCodes.Pop);
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il.Emit(OpCodes.Ret);
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}
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#endregion
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const MethodAttributes propertyMethodAttr = MethodAttributes.Public | MethodAttributes.SpecialName | MethodAttributes.HideBySig;
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const MethodAttributes virtualPropertyMethodAttr = propertyMethodAttr | MethodAttributes.Virtual | MethodAttributes.Final;
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const MethodAttributes virtualMemberMethod = MethodAttributes.Public | MethodAttributes.Virtual | MethodAttributes.HideBySig | MethodAttributes.Final;
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#region IGeneratedStore
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typeBuilder.AddInterfaceImplementation(typeof(IGeneratedStore));
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var IGeneratedStore_t = typeof(IGeneratedStore);
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var IGeneratedStore_GetImpl = IGeneratedStore_t.GetProperty(nameof(IGeneratedStore.Impl)).GetGetMethod();
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var IGeneratedStore_GetType = IGeneratedStore_t.GetProperty(nameof(IGeneratedStore.Type)).GetGetMethod();
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var IGeneratedStore_GetParent = IGeneratedStore_t.GetProperty(nameof(IGeneratedStore.Parent)).GetGetMethod();
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var IGeneratedStore_GetValues = IGeneratedStore_t.GetProperty(nameof(IGeneratedStore.Values)).GetGetMethod();
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var IGeneratedStore_SetValues = IGeneratedStore_t.GetProperty(nameof(IGeneratedStore.Values)).GetSetMethod();
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#region IGeneratedStore.Impl
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var implProp = typeBuilder.DefineProperty(nameof(IGeneratedStore.Impl), PropertyAttributes.None, typeof(Impl), null);
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var implPropGet = typeBuilder.DefineMethod($"<g>{nameof(IGeneratedStore.Impl)}", virtualPropertyMethodAttr, implProp.PropertyType, Type.EmptyTypes);
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implProp.SetGetMethod(implPropGet);
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typeBuilder.DefineMethodOverride(implPropGet, IGeneratedStore_GetImpl);
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{
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var il = implPropGet.GetILGenerator();
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il.Emit(OpCodes.Ldarg_0); // load this
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il.Emit(OpCodes.Ldfld, implField); // load impl field
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il.Emit(OpCodes.Ret);
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}
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#endregion
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#region IGeneratedStore.Type
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var typeProp = typeBuilder.DefineProperty(nameof(IGeneratedStore.Type), PropertyAttributes.None, typeof(Type), null);
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var typePropGet = typeBuilder.DefineMethod($"<g>{nameof(IGeneratedStore.Type)}", virtualPropertyMethodAttr, typeProp.PropertyType, Type.EmptyTypes);
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typeProp.SetGetMethod(typePropGet);
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typeBuilder.DefineMethodOverride(typePropGet, IGeneratedStore_GetType);
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{
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var il = typePropGet.GetILGenerator();
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il.Emit(OpCodes.Ldarg_0); // load this
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il.Emit(OpCodes.Ldfld, typeField); // load impl field
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il.Emit(OpCodes.Ret);
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}
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#endregion
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#region IGeneratedStore.Parent
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var parentProp = typeBuilder.DefineProperty(nameof(IGeneratedStore.Parent), PropertyAttributes.None, typeof(IGeneratedStore), null);
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var parentPropGet = typeBuilder.DefineMethod($"<g>{nameof(IGeneratedStore.Parent)}", virtualPropertyMethodAttr, parentProp.PropertyType, Type.EmptyTypes);
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parentProp.SetGetMethod(parentPropGet);
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typeBuilder.DefineMethodOverride(parentPropGet, IGeneratedStore_GetParent);
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{
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var il = parentPropGet.GetILGenerator();
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il.Emit(OpCodes.Ldarg_0); // load this
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il.Emit(OpCodes.Ldfld, parentField); // load impl field
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il.Emit(OpCodes.Ret);
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}
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#endregion
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#region IGeneratedStore.Values
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var valuesProp = typeBuilder.DefineProperty(nameof(IGeneratedStore.Values), PropertyAttributes.None, typeof(Value), null);
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var valuesPropGet = typeBuilder.DefineMethod($"<g>{nameof(IGeneratedStore.Values)}", virtualPropertyMethodAttr, valuesProp.PropertyType, Type.EmptyTypes);
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var valuesPropSet = typeBuilder.DefineMethod($"<s>{nameof(IGeneratedStore.Values)}", virtualPropertyMethodAttr, null, new[] { valuesProp.PropertyType });
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valuesProp.SetGetMethod(valuesPropGet);
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typeBuilder.DefineMethodOverride(valuesPropGet, IGeneratedStore_GetValues);
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valuesProp.SetSetMethod(valuesPropSet);
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typeBuilder.DefineMethodOverride(valuesPropSet, IGeneratedStore_SetValues);
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{ // this is non-locking because the only code that will call this will already own the correct lock
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var il = valuesPropGet.GetILGenerator();
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// TODO: implement get_Values
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il.Emit(OpCodes.Ldnull);
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il.Emit(OpCodes.Ret);
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}
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{ // this is non-locking because the only code that will call this will already own the correct lock
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var il = valuesPropSet.GetILGenerator();
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// TODO: implement set_Values
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il.Emit(OpCodes.Ret);
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}
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#endregion
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#endregion
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#region IConfigStore
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typeBuilder.AddInterfaceImplementation(typeof(IConfigStore));
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var IConfigStore_t = typeof(IConfigStore);
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var IConfigStore_GetSyncObject = IConfigStore_t.GetProperty(nameof(IConfigStore.SyncObject)).GetGetMethod();
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var IConfigStore_GetWriteSyncObject = IConfigStore_t.GetProperty(nameof(IConfigStore.WriteSyncObject)).GetGetMethod();
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var IConfigStore_WriteTo = IConfigStore_t.GetMethod(nameof(IConfigStore.WriteTo));
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var IConfigStore_ReadFrom = IConfigStore_t.GetMethod(nameof(IConfigStore.ReadFrom));
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#region IConfigStore.SyncObject
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var syncObjProp = typeBuilder.DefineProperty(nameof(IConfigStore.SyncObject), PropertyAttributes.None, typeof(WaitHandle), null);
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var syncObjPropGet = typeBuilder.DefineMethod($"<g>{nameof(IConfigStore.SyncObject)}", virtualPropertyMethodAttr, syncObjProp.PropertyType, Type.EmptyTypes);
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syncObjProp.SetGetMethod(syncObjPropGet);
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typeBuilder.DefineMethodOverride(syncObjPropGet, IConfigStore_GetSyncObject);
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{
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var il = syncObjPropGet.GetILGenerator();
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il.Emit(OpCodes.Ldarg_0);
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il.Emit(OpCodes.Call, Impl.FindImplMethod);
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il.Emit(OpCodes.Tailcall);
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il.Emit(OpCodes.Call, Impl.SyncObjectGetMethod);
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il.Emit(OpCodes.Ret);
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}
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#endregion
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#region IConfigStore.WriteSyncObject
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var writeSyncObjProp = typeBuilder.DefineProperty(nameof(IConfigStore.WriteSyncObject), PropertyAttributes.None, typeof(WaitHandle), null);
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var writeSyncObjPropGet = typeBuilder.DefineMethod($"<g>{nameof(IConfigStore.WriteSyncObject)}", virtualPropertyMethodAttr, writeSyncObjProp.PropertyType, Type.EmptyTypes);
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writeSyncObjProp.SetGetMethod(writeSyncObjPropGet);
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typeBuilder.DefineMethodOverride(writeSyncObjPropGet, IConfigStore_GetWriteSyncObject);
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{
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var il = writeSyncObjPropGet.GetILGenerator();
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il.Emit(OpCodes.Ldarg_0);
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il.Emit(OpCodes.Call, Impl.FindImplMethod);
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il.Emit(OpCodes.Tailcall);
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il.Emit(OpCodes.Call, Impl.WriteSyncObjectGetMethod);
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il.Emit(OpCodes.Ret);
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}
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#endregion
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#region IConfigStore.WriteTo
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var writeTo = typeBuilder.DefineMethod($"<>{nameof(IConfigStore.WriteTo)}", virtualMemberMethod, null, new[] { typeof(IConfigProvider) });
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typeBuilder.DefineMethodOverride(writeTo, IConfigStore_WriteTo);
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{
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var il = writeTo.GetILGenerator();
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il.Emit(OpCodes.Ldarg_0);
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il.Emit(OpCodes.Call, Impl.FindImplMethod);
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il.Emit(OpCodes.Ldarg_1);
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il.Emit(OpCodes.Tailcall);
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il.Emit(OpCodes.Call, Impl.WriteToMethod);
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il.Emit(OpCodes.Ret);
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}
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#endregion
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#region IConfigStore.ReadFrom
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var readFrom = typeBuilder.DefineMethod($"<>{nameof(IConfigStore.ReadFrom)}", virtualMemberMethod, null, new[] { typeof(IConfigProvider) });
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typeBuilder.DefineMethodOverride(readFrom, IConfigStore_ReadFrom);
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{
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var il = readFrom.GetILGenerator();
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il.Emit(OpCodes.Ldarg_0);
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il.Emit(OpCodes.Call, Impl.FindImplMethod);
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il.Emit(OpCodes.Ldarg_1);
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il.Emit(OpCodes.Tailcall);
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il.Emit(OpCodes.Call, Impl.ReadFromMethod);
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il.Emit(OpCodes.Ret);
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}
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#endregion
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#endregion
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#region Changed
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var coreChanged = typeBuilder.DefineMethod(
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"<>Changed",
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MethodAttributes.Public | MethodAttributes.HideBySig,
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null, Type.EmptyTypes);
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{
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var il = coreChanged.GetILGenerator();
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il.Emit(OpCodes.Ldarg_0);
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il.Emit(OpCodes.Call, Impl.ImplSignalChangedMethod);
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il.Emit(OpCodes.Ret); // simply call our impl's SignalChanged method and return
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}
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if (baseChanged != null) {
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var changedMethod = typeBuilder.DefineMethod( // copy to override baseChanged
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baseChanged.Name,
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MethodAttributes.Public | MethodAttributes.Virtual | MethodAttributes.Final | MethodAttributes.HideBySig,
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null, Type.EmptyTypes);
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typeBuilder.DefineMethodOverride(changedMethod, baseChanged);
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{
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var il = changedMethod.GetILGenerator();
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il.Emit(OpCodes.Ldarg_0);
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il.Emit(OpCodes.Call, baseChanged); // call base
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il.Emit(OpCodes.Ldarg_0);
|
|
il.Emit(OpCodes.Tailcall);
|
|
il.Emit(OpCodes.Call, coreChanged); // call back to the core change method
|
|
|
|
il.Emit(OpCodes.Ret);
|
|
}
|
|
|
|
coreChanged = changedMethod; // switch to calling this version instead of just the default
|
|
}
|
|
#endregion
|
|
|
|
// TODO: generate overrides for all the virtual properties
|
|
|
|
var genType = typeBuilder.CreateType();
|
|
|
|
var parentParam = Expression.Parameter(typeof(IGeneratedStore), "parent");
|
|
var creatorDel = Expression.Lambda<Func<IGeneratedStore, IConfigStore>>(
|
|
Expression.New(ctor, parentParam), parentParam
|
|
).Compile();
|
|
|
|
{ // register a member map
|
|
var dict = new Dictionary<string, Type>();
|
|
foreach (var kvp in structure)
|
|
dict.Add(kvp.Key, kvp.Value.Type);
|
|
memberMaps.Add(type, dict);
|
|
}
|
|
|
|
return creatorDel;
|
|
}
|
|
|
|
// expects the this param to be on the stack
|
|
private static void EmitMemberFix(ILGenerator il, SerializedMemberInfo member)
|
|
{
|
|
|
|
}
|
|
|
|
}
|
|
}
|