private Action <TInstance, object[]> GetPropertySetter(PropertyInfo[] properties, ITypeProvider provider)
{
var type = typeof(TInstance);
var methodName = string.Concat(
"D$PropertySetter$",
type.FullName.Replace(".", "_"),
"$",
Guid.NewGuid());
var method = new DynamicMethod(methodName, typeof(void), new[] { type, typeof(object[]) });
var il = method.GetILGenerator();
var instance = ILPointer.Arg(0, type);
var props = ILPointer.Arg(1, typeof(object[]));
for (var i = 0; i < properties.Length; i++)
{
var property = properties[i];
var value = props
.ElementAt(i)
.Cast(property.PropertyType);
il.Set(instance, property, value);
}
il.Emit(OpCodes.Ret);
return((Action <TInstance, object[]>)
method.CreateDelegate(typeof(Action <TInstance, object[]>)));
}
private void BuildReadMethods(SerializableType target, TravellerContext context)
{
var typedMethodBuilder = _travelReadMethod;
var readBuilder = new DynamicReadTravellerBuilder(typedMethodBuilder, target, context, _typeProvider.Provider);
readBuilder.BuildTravelReadMethod();
var untypedMethodBuilder = _classBuilder.DefineOverloadMethod("Travel", typeof(void), new[] { typeof(IReadVisitor), typeof(object) });
var il = untypedMethodBuilder.IL;
il.InvokeMethod(ILPointer.This(),
typedMethodBuilder.Method,
ILPointer.Arg(1, typeof(IReadVisitor)),
ILPointer.Arg(2, typeof(object)).Cast(target.Type));
il.Emit(OpCodes.Ret);
}
public void IterateList()
{
var mt = new DynamicMethod("Test$" + 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 DynamicActivator(ConstructorInfo constructor, ITypeProvider provider)
{
if (constructor == null)
{
throw new ArgumentNullException(nameof(constructor));
}
if (provider == null)
{
throw new ArgumentNullException(nameof(provider));
}
Type = constructor.DeclaringType;
var methodName = string.Concat(
"D$Activator$",
Type.FullName.Replace(".", "_"),
"$",
constructor.GetParameters().Length,
Guid.NewGuid());
var method = new DynamicMethod(methodName, typeof(object), DynConstructorTypes);
var il = method.GetILGenerator();
var methodParams = ILPointer.Arg(0, typeof(object[]));
var parameters = constructor.GetParameters();
var constructParameters = new ILPointer[parameters.Length];
for (var i = 0; i < parameters.Length; i++)
{
var parameter = parameters[i];
var constructParam = methodParams
.ElementAt(i)
.Cast(parameter.ParameterType);
constructParameters[i] = constructParam;
}
il.Construct(constructor, constructParameters);
il.Emit(OpCodes.Ret);
_activate = (Func <object[], object>)
method.CreateDelegate(typeof(Func <object[], object>));
}