public void BuildTraveller()
{
if (_classBuilder.IsSealed)
{
throw new InvalidOperationException("Classification builder is sealed");
}
var target = _typeProvider.GetOrCreate(_type);
var members = _dtContext.Members;
var factoryArgument = new ILArgPointer(members.VisitArgsFactoryType, 1);
var childTravellers = new Dictionary <Type, ChildTravellerInfo>();
var argFields = new Dictionary <SerializableProperty, FieldInfo>();
var il = _constructorBuilder.IL;
var travellerIndex = 0;
foreach (var property in target.Properties)
{
var argField = _classBuilder.DefinePrivateField("_arg" + property.Ref.Name, members.VisitArgsType);
var visitArgsCode = new ILCallMethodSnippet(factoryArgument, members.ConstructVisitArgsMethod, property.Ref.Name);
il.Set(ILPointer.This(), argField, visitArgsCode);
argFields.Add(property, argField);
if (!ReflectionAnalyzer.TryGetComplexTypes(property.Ext, out var types))
{
continue;
}
foreach (var type in types)
{
if (childTravellers.ContainsKey(type))
{
continue;
}
var dynamicTraveller = _dtContext.Get(type);
var interfaceType = typeof(IGraphTraveller <>).MakeGenericType(type);
var fieldBuilder = _classBuilder.DefinePrivateField(string.Concat("_traveller", type.Name, ++travellerIndex), interfaceType);
childTravellers.Add(type, new ChildTravellerInfo {
Field = fieldBuilder,
TravelWriteMethod = dynamicTraveller.TravelWriteMethod,
TravelReadMethod = dynamicTraveller.TravelReadMethod
});
var getFactoryCode = ILSnippet.Call(factoryArgument, members.ConstructVisitArgsWithTypeMethod, type);
var newTraveller = ILPointer.New(dynamicTraveller.Constructor, getFactoryCode);
il.Set(ILPointer.This(), fieldBuilder, newTraveller);
}
}
il.Emit(OpCodes.Ret);
var context = new TravellerContext(childTravellers, argFields);
BuildWriteMethods(target, context);
BuildReadMethods(target, context);
_classBuilder.Seal();
DynamicTraveller.Complete(_classBuilder.Type);
}
public void IterateList()
{
var mt = new DynamicMethod("Test$" + Guid.NewGuid(), typeof(string), new [] { typeof(List <string>) });
var il = mt.GetILGenerator();
var list = ILPointer.Arg(0, typeof(List <string>));
var concatMethod = typeof(string).GetMethod("Concat", new[] { typeof(object), typeof(object) });
var res = il.NewLocal(typeof(string));
il.Enumerate(list, cur => il.Set(res, ILSnippet.Call(concatMethod, res, cur)));
il.Load(res);
il.Emit(OpCodes.Ret);
var m = (Func <List <string>, string>)mt.CreateDelegate(typeof(Func <List <string>, string>));
Assert.Equal("HelloWorld", m.Invoke(new List <string> {
"Hello", "World"
}));
}
public static ILPointer Call(this ILPointer instance, string methodName, params ILPointer[] parameters)
{
return(ILSnippet.Call(instance, methodName, parameters));
}
public static ILPointer Call(this ILPointer instance, MethodInfo method, params ILPointer[] parameters)
{
return(ILSnippet.Call(instance, method, parameters));
}
