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//example emit code borrowed and lightly modified from http://www.c-sharpcorner.com/uploadfile/puranindia/reflection-and-reflection-emit-in-C-Sharp/

using System;
using System.Reflection;
using System.Reflection.Emit;
using System.Threading;

namespace ConsoleApplication12 {
    
// declare the interface

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using System;
using NullableInt = System.Nullable<int>;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("null:");

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namespace JustATest
{
  // public struct InheritingTuple(int A, int B) : (int, int)(A, B); 
  // same: public struct InheritingTuple(int A, int B) : (int A, int B)(A, B);
  // same, better?: public struct InheritingTuple(int A, int B) : (int A: A, int B: B); 
  // compiles as:
  // public struct InheritingTuple(int A, int B) : ValueTuple<int, int>(A, B); 
  // should this be allowed?
  // I think no: ValueTuple<T...> structs sealed?
  // where would attribute go?

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using System;
using System.Reflection;
using System.Diagnostics;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {

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using System;
using System.Diagnostics;
using System.Runtime.CompilerServices;
using System.Text;

namespace ConsoleApplication1 {
    internal partial class Program {
        private const int Iterations = 10000;

        private static void Main() {

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        [Fact]
        public void NewArrayUsesCachedArray() {
            var verifier = CompileAndVerify(@"
namespace System
{
    public class Object { }
    public class ValueType { }
    public struct Int32 { }
    public class String { }

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    (int, int) LocateRange<TKey, TValue> (SortedList<TKey, TValue> list, Func<Tkey, bool> beforeRange, Func<Tkey, bool> inRange, Func<Tkey, bool> afterRange)
    {
        //
        // searches list for the range of items that meet the specified criteria
        // returns (-1, -1) if nothing found or the indices if it is
        //
        // example searching a string keyed list by items that start with some value:
        //
        // given:

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public static class SliceExtensions
{
    public static Slice<T> ToSlice<T>(this T[] array)
    {
        return new Slice<T>(array);
    }

    public static Slice<T> ToSlice<T>(this T[] array, int offset, int length)
    {
        return new Slice<T>(array, offset, length);

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{
  // Code size       66 (0x42)
  .maxstack  7
  IL_0000:  ldnull
  IL_0001:  ldtoken    ""int Test.ModAdd2(params int[])""
  IL_0006:  call       ""System.Reflection.MethodBase System.Reflection.MethodBase.GetMethodFromHandle(System.RuntimeMethodHandle)""
  IL_000b:  castclass  ""System.Reflection.MethodInfo""
  IL_0010:  ldc.i4.1
  IL_0011:  newarr     ""System.Linq.Expressions.Expression""

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    // the meat and potatoes...
    public class DataStoreCodeGen {
        private const TypeAttributes public_sealed_class = TypeAttributes.Class | TypeAttributes.Public | TypeAttributes.AutoLayout | TypeAttributes.AnsiClass | TypeAttributes.Sealed | TypeAttributes.BeforeFieldInit;
        private const MethodAttributes public_ctor = MethodAttributes.Public | MethodAttributes.HideBySig | MethodAttributes.SpecialName | MethodAttributes.RTSpecialName;
        private const MethodAttributes get_set = MethodAttributes.Public | MethodAttributes.HideBySig | MethodAttributes.NewSlot | MethodAttributes.Virtual | MethodAttributes.Final | MethodAttributes.SpecialName;

        // singleton reference to module containing all generated storage interfaces
        private static ModuleBuilder ModuleBuilder { get; } = CreateModuleBuilder();