private static System.Action <TTarget, TValue> EmitPropertySetter <TTarget, TValue>(System.Reflection.PropertyInfo propertyInfo, System.Reflection.MethodInfo setMethod)
{
var propType = propertyInfo.PropertyType;
var declaringType = propertyInfo.DeclaringType;
var dynamicMethod = EmitUtils.CreateDynamicMethod(string.Format("{0}_{1}", "$Set", propertyInfo.Name),
null,
new[] { typeof(TTarget), typeof(TValue) },
declaringType);
var il = dynamicMethod.GetILGenerator();
il.DeclareLocal(propType);
il.Ldarg_1();
if (!typeof(TValue).GetTypeInfo().IsValueType)
{
il.CastValue(propType);
}
il.Stloc_0();
if (!setMethod.IsStatic)
{
il.Ldarg_0();
il.CastReference(declaringType);
}
il.Ldloc_0();
il.CallMethod(setMethod);
il.Ret();
return((System.Action <TTarget, TValue>)dynamicMethod.CreateDelegate(typeof(System.Action <TTarget, TValue>)));
}
private static System.Func <TSource, TReturn> EmitPropertyGetter <TSource, TReturn>(System.Reflection.PropertyInfo propertyInfo, System.Reflection.MethodInfo getMethod)
{
var dynamicMethod = EmitUtils.CreateDynamicMethod(string.Format("{0}_{1}", "$Get", propertyInfo.Name),
typeof(TReturn),
new[] { typeof(TSource) },
propertyInfo.DeclaringType);
var il = dynamicMethod.GetILGenerator();
if (!getMethod.IsStatic)
{
if (typeof(TSource).GetTypeInfo().IsValueType)
{
il.Ldarga_S(0);
}
else
{
il.Ldarg_0();
il.CastReference(propertyInfo.DeclaringType);
}
}
il.CallMethod(getMethod);
if (!typeof(TReturn).GetTypeInfo().IsValueType&& propertyInfo.PropertyType.GetTypeInfo().IsValueType)
{
il.Box(propertyInfo.PropertyType);
}
il.Ret();
return((System.Func <TSource, TReturn>)dynamicMethod.CreateDelegate(typeof(System.Func <TSource, TReturn>)));
}
public static System.Func <Type> CreateDelegate <Type>(System.Type type)
{
if (type == null)
{
throw new System.ArgumentNullException(nameof(type));
}
var typeInfo = type.GetTypeInfo();
if (typeInfo.IsInterface)
{
throw new System.ArgumentException(string.Format("{0} is an interface.", type), nameof(type));
}
if (typeInfo.IsAbstract)
{
throw new System.ArgumentException(string.Format("{0} is abstract.", type), nameof(type));
}
System.Reflection.ConstructorInfo constructorInfo = null;
if (typeInfo.IsClass)
{
constructorInfo = type.GetConstructor(System.Type.EmptyTypes);
if (constructorInfo == null)
{
throw new System.ArgumentException(string.Format("{0} does not have a public parameterless constructor.", type), nameof(type));
}
}
var dynamicMethod = EmitUtils.CreateDynamicMethod(string.Format("{0}_{1}", "$Create", type), typeof(Type), System.Type.EmptyTypes, type);
var il = dynamicMethod.GetILGenerator();
if (typeInfo.IsClass)
{
il.Newobj(constructorInfo);
}
else
{
il.DeclareLocal(type);
il.LoadLocalVariableAddress(0);
il.Initobj(type);
il.LoadLocalVariable(0);
il.Box(type);
}
il.Ret();
return((System.Func <Type>)dynamicMethod.CreateDelegate(typeof(System.Func <Type>)));
}
private static System.Func <TSource, TReturn> EmitFieldGetter <TSource, TReturn>(System.Reflection.FieldInfo fieldInfo)
{
if (fieldInfo.IsStatic && fieldInfo.IsLiteral)
{
return(null);
}
var dynamicMethod = EmitUtils.CreateDynamicMethod(string.Format("{0}_{1}", "$Get", fieldInfo.Name),
typeof(TReturn),
new[] { typeof(TSource) },
fieldInfo.DeclaringType);
var il = dynamicMethod.GetILGenerator();
if (fieldInfo.IsStatic)
{
il.Ldsfld(fieldInfo);
}
else
{
if (typeof(TSource).GetTypeInfo().IsValueType)
{
il.Ldarga_S(0);
}
else
{
il.Ldarg_0();
il.CastReference(fieldInfo.DeclaringType);
}
il.Ldfld(fieldInfo);
}
if (!typeof(TReturn).GetTypeInfo().IsValueType&& fieldInfo.FieldType.GetTypeInfo().IsValueType)
{
il.Box(fieldInfo.FieldType);
}
il.Ret();
return((System.Func <TSource, TReturn>)dynamicMethod.CreateDelegate(typeof(System.Func <TSource, TReturn>)));
}
private static System.Action <TTarget, TValue> EmitFieldSetter <TTarget, TValue>(System.Reflection.FieldInfo fieldInfo)
{
if (fieldInfo.IsStatic && fieldInfo.IsLiteral)
{
return(null);
}
var dynamicMethod = EmitUtils.CreateDynamicMethod(string.Format("{0}_{1}", "$Set", fieldInfo.Name),
null,
new[] { typeof(TTarget), typeof(TValue) },
fieldInfo.DeclaringType);
var il = dynamicMethod.GetILGenerator();
il.DeclareLocal(fieldInfo.FieldType);
il.Ldarg_1();
if (!typeof(TValue).GetTypeInfo().IsValueType)
{
il.CastValue(fieldInfo.FieldType);
}
il.Stloc_0();
if (fieldInfo.IsStatic)
{
il.Ldloc_0();
il.Stsfld(fieldInfo);
}
else
{
il.Ldarg_0();
il.CastReference(fieldInfo.DeclaringType);
il.Ldloc_0();
il.Stfld(fieldInfo);
}
il.Ret();
return((System.Action <TTarget, TValue>)dynamicMethod.CreateDelegate(typeof(System.Action <TTarget, TValue>)));
}
public static System.Func <object[], object> CreateDelegate(System.Reflection.ConstructorInfo constructorInfo, bool validateArguments = true)
{
if (constructorInfo == null)
{
throw new System.ArgumentNullException(nameof(constructorInfo));
}
var delclaringType = constructorInfo.DeclaringType.GetTypeInfo();
if (delclaringType.IsAbstract)
{
throw new System.ArgumentException("The declaring type of the constructor is abstract.", nameof(constructorInfo));
}
var dynamicMethod = EmitUtils.CreateDynamicMethod(string.Format("{0}_{1}", "$Create", delclaringType.Name),
typeof(object),
new[] { typeof(object[]) },
constructorInfo.DeclaringType);
var il = dynamicMethod.GetILGenerator();
var args = constructorInfo.GetParameters();
var lableValidationCompleted = il.DefineLabel();
if (!validateArguments || args.Length == 0)
{
il.Br_S(lableValidationCompleted);
}
else
{
var lableCheckArgumentsLength = il.DefineLabel();
il.Ldarg_0();
il.Brtrue_S(lableCheckArgumentsLength);
il.ThrowArgumentsNullExcpetion("arguments");
il.MarkLabel(lableCheckArgumentsLength);
il.Ldarg_0();
il.Ldlen();
il.Conv_I4();
il.LoadInt32(args.Length);
il.Bge_S(lableValidationCompleted);
il.ThrowArgumentsExcpetion("Not enough arguments in the argument array.", "arguments");
}
il.MarkLabel(lableValidationCompleted);
if (args.Length > 0)
{
for (int i = 0; i < args.Length; i++)
{
il.Ldarg_0();
il.LoadInt32(i);
il.Ldelem_Ref();
il.CastValue(args[i].ParameterType);
}
}
il.Newobj(constructorInfo);
il.Ret();
return((System.Func <object[], object>)dynamicMethod.CreateDelegate(typeof(System.Func <object[], object>)));
}
