Search for `return null;` `yield return null;`, `return default(object);` and equivalents from ScriptCs/LinqPAD

Howto.md

• Install Chocolatey
• Reopen console application (for example cmd.exe) to update %PATH% and other environment variables
• Install ScriptCs using chocolatey
• Install dependencies using scriptcs -install -pre
• Edit solutionPath const to point to solution
• Run scriptcs .\SearchForReturnNulls.csx

packages.config

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="Roslyn" version="1.2.20906.2" targetFramework="net45" />
	<package id="Roslyn.Compilers" version="1.2.20906.2" targetFramework="net45" />
	<package id="Roslyn.Compilers.Common" version="1.2.20906.2" targetFramework="net45" />
	<package id="Roslyn.Compilers.CSharp" version="1.2.20906.2" targetFramework="net45" />
	<package id="Roslyn.Services.Common" version="1.2.20906.2" targetFramework="net45" />
	<package id="Roslyn.Services.CSharp" version="1.2.20906.2" targetFramework="net45" />
	<package id="Newtonsoft.Json" version="5.0.5" targetFramework="net45" />
	<package id="AfterProgramming" version="0.0.2-alpha" targetFramework="net45" />
</packages>

SearchForReturnNulls.csx

// scriptcs -install -pre — run to install dependencies

using System.Threading;
using System.Diagnostics;
using Roslyn.Compilers.CSharp;
using Roslyn.Compilers.Common;
using Newtonsoft.Json;
using AfterProgramming;
using AfterProgramming.Internal;

// change path to solution
const string solutionPath = @"D:\temp\nhibernate-core-master\src\NHibernate.Everything.sln";

var cancellationTokenSource = new CancellationTokenSource(TimeSpan.FromMinutes(5));
var cancellationToken = cancellationTokenSource.Token;

Console.WriteLine("Start introspection at {0}…", solutionPath);

var watch = Stopwatch.StartNew();

var results = new ReturnStatement()
  .SearchForReturnNullStatements(solutionPath, cancellationToken);

watch.Stop();

Console.WriteLine(
	JsonConvert.SerializeObject(
		results.Take(10), Formatting.Indented));

Console.WriteLine("Finish introspection in {0} ms", watch.Elapsed);