ashmind / sharplab Goto Github PK

.NET language playground

License: BSD 2-Clause "Simplified" License

C# 68.36% PowerShell 0.58% JavaScript 0.27% HTML 0.35% CSS 0.09% Batchfile 0.01% F# 0.81% C++ 2.08% TypeScript 24.31% Less 2.56% C 0.03% GLSL 0.40% Visual Basic .NET 0.13%

sharplab's Introduction

This repository contains source code for https://sharplab.io.

SharpLab is a .NET code playground that shows intermediate steps and results of code compilation. Some language features are thin wrappers on top of other features -- e.g. using() becomes try/finally. SharpLab allows you to see the code as compiler sees it, and get a better understanding of .NET languages.

Recent versions include experimental support for running code, with some limitations.

Languages

SharpLab supports three source languages:

C#
Visual Basic
F#

Due to complexity of F#'s compiler library, some features might not be available for F#.

Decompilation/Disassembly

There are currently three targets for decompilation/disassembly:

C#
IL
JIT Asm (Native Asm Code)

Note that VB=>C# disassembly shouldn't be used to convert between languages, as the produced code is intentionally overly verbose.

Execution

You can use "Run" target to execute your code and see the output.
Execution enables a few nice features such as flow arrows — see here:
https://twitter.com/ashmind/status/894058159223955456.

Execution is intentionally limited, however the limits are continuously improved and corrected.

Contributing

See CONTRIBUTING.md.

sharplab's People

Contributors

Stargazers

Watchers

Forkers

khellang injac modulexcite i3arnon serdarsert reiteristvan tessenr jacksparrow47 pakrym garciat vbfox uehara sreejith-ms tyoverby danmannmann leolorenzoluis taraskovalenko codeyu gyurisc davidwengier karthik25 peachpiecompiler codesanook jnm2 larrynung svick hypeartist techlord-rce wackoisgod alto971 muojp agocke jason-mcdermott molongwudi scott-caldwell propellingbits yuchenhui cailin-lai attackgithub paradoxforge qinfengzhu weikety fjwuyongzhi csuffyy weiplanet leegkon w8w8w8 dystudio haptear lingkeyang flying19880517 ljdong-fy hengle yhpopulus unitygraphics kiryushin-andrey bladerzhu okusnadi softearth nxybcce wildgenie th9452 stjordanis guipengliao bluexo mario206 yohdeadfall awesomedotnetcore bjarkirafn am11 computerline1z alrz zndetcl ihaiucom lingbohome darkbullnull arcdev vnvizitiu kkacer youssef1313 nangal whx189855 laraevdokimova waylandgod adamspeight2008 zhouzu dogac00 8ggmaker d5j6 shz701 ygorhenrique little3388 msylvia erdembayar pvdfe xuan2261 teo-tsirpanis aaronamm null0b m-carrasco

sharplab's Issues

Add support for JIT Dasm Code generation

This would be pretty epic https://github.com/dotnet/jitutils

/cc @benaadams @jamesqo

Allow change the language version to expirimental

to use other branch like roslyn/local-functions

Add LICENSE.md/txt

What license is this code?

Branch 'tuples' is broken

http://tryroslyn.azurewebsites.net/#b:features-tuples/K4Zwlgdg5gBAygTxAFwKYFsDcBYAUAB2ACMAbMAYxnJIEMQQYBhGAbzxg5kNIpgDcA9mAAmMALIAKAJSt2nAL555QA==


(,,,): error : An error occurred when trying to create a controller of type 'RoslynController'. Make sure that the controller has a parameterless public constructor.
 at System.Web.Http.Dispatcher.DefaultHttpControllerActivator.Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType)
 at System.Web.Http.Tracing.Tracers.HttpControllerActivatorTracer.<>c__DisplayClass2.<System.Web.Http.Dispatcher.IHttpControllerActivator.Create>b__0()
 at System.Web.Http.Tracing.ITraceWriterExtensions.TraceBeginEnd(ITraceWriter traceWriter, HttpRequestMessage request, String category, TraceLevel level, String operatorName, String operationName, Action`1 beginTrace, Action execute, Action`1 endTrace, Action`1 errorTrace)
 at System.Web.Http.Tracing.Tracers.HttpControllerActivatorTracer.System.Web.Http.Dispatcher.IHttpControllerActivator.Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType)
 at System.Web.Http.Controllers.HttpControllerDescriptor.CreateController(HttpRequestMessage request)
 at System.Web.Http.Tracing.Tracers.HttpControllerDescriptorTracer.<>c__DisplayClass2.<CreateController>b__0()
 at System.Web.Http.Tracing.ITraceWriterExtensions.TraceBeginEnd(ITraceWriter traceWriter, HttpRequestMessage request, String category, TraceLevel level, String operatorName, String operationName, Action`1 beginTrace, Action execute, Action`1 endTrace, Action`1 errorTrace)
 at System.Web.Http.Tracing.Tracers.HttpControllerDescriptorTracer.CreateController(HttpRequestMessage request)
 at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()

Probably related to #24.

Error when trying to compile using master

When compiling code on Roslyn's master branch, I get the following error:

An error occurred when trying to create a controller of type 'RoslynController'. Make sure that the controller has a parameterless public constructor.
 at System.Web.Http.Dispatcher.DefaultHttpControllerActivator.Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType)
 at System.Web.Http.Tracing.Tracers.HttpControllerActivatorTracer.<>c__DisplayClass2.<System.Web.Http.Dispatcher.IHttpControllerActivator.Create>b__0()
 at System.Web.Http.Tracing.ITraceWriterExtensions.TraceBeginEnd(ITraceWriter traceWriter, HttpRequestMessage request, String category, TraceLevel level, String operatorName, String operationName, Action`1 beginTrace, Action execute, Action`1 endTrace, Action`1 errorTrace)
 at System.Web.Http.Tracing.Tracers.HttpControllerActivatorTracer.System.Web.Http.Dispatcher.IHttpControllerActivator.Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType)
 at System.Web.Http.Controllers.HttpControllerDescriptor.CreateController(HttpRequestMessage request)
 at System.Web.Http.Tracing.Tracers.HttpControllerDescriptorTracer.<>c__DisplayClass2.<CreateController>b__0()
 at System.Web.Http.Tracing.ITraceWriterExtensions.TraceBeginEnd(ITraceWriter traceWriter, HttpRequestMessage request, String category, TraceLevel level, String operatorName, String operationName, Action`1 beginTrace, Action execute, Action`1 endTrace, Action`1 errorTrace)
 at System.Web.Http.Tracing.Tracers.HttpControllerDescriptorTracer.CreateController(HttpRequestMessage request)
 at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()

Compiling using Release (NuGet) works fine.

Fix new tuple feature

[mirrorsharp] Ensure styling is consistent between source and decompiled code

[mirrorsharp] Ensure showhint works without an explicit dependency

Invalid code when decompiling string switch statement

Given program:

using System;
public class C {
    public int M() {

        string n = GetDefault<string>();

        switch(n) {
            case null: return 1;
            case "foo": return 2;
            default: return 3;
        }
    }

    private T GetDefault<T>() {
        return default(T);   
    }
}

decompilation to C# returns:

public class C
{
    public int M()
    {
        string @default = this.GetDefault<string>();
        string text = @default;
        int result;
        if (text != null)
        {
            if (!text == "foo")
            {
                result = 3;
            }
            else
            {
                result = 2;
            }
        }
        else
        {
            result = 1;
        }
        return result;
    }
    private T GetDefault<T>()
    {
        return default(T);
    }
}

Line if (!text == "foo") contains syntax error, it should be decompiled to if (text != "foo") or at least to if(! (text == "foo") ).

Exception message should preserve newlines

When Roslyn throws an exception while compiling some code (for example: dotnet/roslyn#13365), the stack trace of the exception is shown with all its lines mushed together as if it was one line:

It would be better if the newlines in the stack trace were preserved, for example by using the whitespace: pre style:

Allow viewing IL differences between compilers

It would be really interesting to be able to use TryRoslyn to learn about differences in the output IL between Roslyn and the C# 5.0 compiler. This would require allowing the user to choose "IL" on the right-hand instead of Decompiled C#, and allowing the user to choose pre-Roslyn versions of the compiler on the left-hand-side.

[mirrorsharp] Re-enable tests

[mirrorsharp] Show loader

[mirrorsharp] Ensure proper reference list

Crash on a specific source

@SLaks:

@ashmind TryRoslyn chokes on http://tryroslyn.azurewebsites.net/#b:master/f:sr/K4Zwlgdg5gBAygTxAFwKYFsDcAoUlaIoYB0AMpAI7ECiAHgA4BOqI4A9hCDtnUy+xAA8AMWAQAxoMjIANDGkA+BTFowAvCvXLVG2piAA

Invalid disassembly with primary constructor argument

http://tryroslyn.azurewebsites.net/#A4VwRgNglgxgBDCBDAziuBZAngYWWuAChQBcAnKAOwHM5KkBbAUwEo4BvAKDh7mAoBuSEkzikKNOoyYAmOAF4pzANycAvkAA

Given

public class MyClass (string name) {
    private string name2 = name;
}

Getting

using System;
using System.Reflection;
using System.Runtime.CompilerServices;
[assembly: AssemblyVersion("0.0.0.0")]
[assembly: CompilationRelaxations(8)]
[assembly: RuntimeCompatibility(WrapNonExceptionThrows = true)]
public class MyClass
{
    private string name2 = name;
    public MyClass(string name)
    {
    }
}

Enable CORS preflight cache

Add README

Cursor is not displayed on iOS 10

[mirrorsharp] "Disconnected" style should be consistent with the current "failed" style

Build fails to git pull (no git user detected)

[07/04/2015 07:30:49 > 95cf44: INFO] Syncing D:\home\site\!roslyn-sources\core-clr
[07/04/2015 07:30:51 > 95cf44: ERR ] From https://github.com/dotnet/roslyn
[07/04/2015 07:30:51 > 95cf44: ERR ]  * branch            core-clr   -> FETCH_HEAD
[07/04/2015 07:31:13 > 95cf44: ERR ] 
[07/04/2015 07:31:13 > 95cf44: ERR ] *** Please tell me who you are.
[07/04/2015 07:31:13 > 95cf44: ERR ] 
[07/04/2015 07:31:13 > 95cf44: ERR ] Run
[07/04/2015 07:31:13 > 95cf44: ERR ] 
[07/04/2015 07:31:13 > 95cf44: ERR ]   git config --global user.email "[email protected]"
[07/04/2015 07:31:13 > 95cf44: ERR ]   git config --global user.name "Your Name"
[07/04/2015 07:31:14 > 95cf44: ERR ] 
[07/04/2015 07:31:14 > 95cf44: ERR ] to set your account's default identity.
[07/04/2015 07:31:14 > 95cf44: INFO] Building D:\home\site\!roslyn-sources\core-clr
[07/04/2015 07:31:14 > 95cf44: ERR ] Omit --global to set the identity only in this repository.
[07/04/2015 07:31:14 > 95cf44: ERR ] 
[07/04/2015 07:31:14 > 95cf44: ERR ] fatal: unable to auto-detect email address (got 'tryroslyn@XXXXXXXXXXXXXXX.(none)')

(XXX above masks some id, not sure of security implications of sharing it)

[mirrorsharp] Multibranch/build support

VB.NET missing Microsoft.VisualBasic.dll reference

module M
  ' ...
end module

Do not compiles because of:

error BC35000: Requested operation is not available because the runtime library function 'Microsoft.VisualBasic.CompilerServices.StandardModuleAttribute..ctor' is not defined.

VB.NET support

Looks not so hard to support :)
Also ILSpy supports decompilation to VB, but produced code just sucks a lot...

Change Azure uploader to ftpush

Decompilation language setting doesn't seem to be picked up from the URL

Example:
http://tryroslyn.azurewebsites.net/#b:AdamSpeight2008-master-Feature-ImplicitDefaultOptionalParameter/f:vb%3Evbr/LIewJgrgNgpgBMAUHFcBiEB2BjALgSxE3QAoB5ABwKIEMo4APASmVTYCUZcIAnYh1igCimMOix5CmRCLGhIsIA==

[mirrorsharp] Ensure default indent is 4 spaces

[mirrorsharp] Ensure URL code store works as expected

[mirrorsharp] Source language selection

[mirrorsharp] Improve project naming

Links to codeplex don't work for branches with last commits on GitHub

I've fixed links to commits in #10. Links to authors still don't work (I couldn't see how to get the files in App_Data to get website to run): might be easiest to remove these links to authors

[mirrorsharp] Debug/Release selection

features/extensionEverything branch throws exception for the default code

With the default code in the left pane, the features/extensionEverything branch fails with this exception. Whether this is a fault with this or with that branch I'm not sure.

An error occurred when trying to create a controller of type 'RoslynController'. Make sure that the controller has a parameterless public constructor.
   at System.Web.Http.Dispatcher.DefaultHttpControllerActivator.Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType)
   at System.Web.Http.Tracing.Tracers.HttpControllerActivatorTracer.<>c__DisplayClass2.<System.Web.Http.Dispatcher.IHttpControllerActivator.Create>b__0()
   at System.Web.Http.Tracing.ITraceWriterExtensions.TraceBeginEnd(ITraceWriter traceWriter, HttpRequestMessage request, String category, TraceLevel level, String operatorName, String operationName, Action`1 beginTrace, Action execute, Action`1 endTrace, Action`1 errorTrace)
   at System.Web.Http.Tracing.Tracers.HttpControllerActivatorTracer.System.Web.Http.Dispatcher.IHttpControllerActivator.Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType)
   at System.Web.Http.Controllers.HttpControllerDescriptor.CreateController(HttpRequestMessage request)
   at System.Web.Http.Tracing.Tracers.HttpControllerDescriptorTracer.<>c__DisplayClass2.<CreateController>b__0()
   at System.Web.Http.Tracing.ITraceWriterExtensions.TraceBeginEnd(ITraceWriter traceWriter, HttpRequestMessage request, String category, TraceLevel level, String operatorName, String operationName, Action`1 beginTrace, Action execute, Action`1 endTrace, Action`1 errorTrace)
   at System.Web.Http.Tracing.Tracers.HttpControllerDescriptorTracer.CreateController(HttpRequestMessage request)
   at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()

The 'master' build has not passed since April

Add ValueTuple package

Requested in dotnet/roslyn#14582.
(Might be worth making package/ref list easily configurable, even if not user-configurable)

Release mode has no effect

See for example this. Lots of NOP instructions in the generated IL and there is no difference when choosing Debug or Release.

Support proper script mode (without rewriting vars to this, etc)

Roslyn script mode changes code too much -- I should do my own rewriting, putting statements/expressions into method body directly without rewriting them to fields.

Please add new C#7 features support

Roslyn updated with support for code like this:

using System;
public class C {
    public ref int M() {
        int [] numbers = { 0b1, 0b0___01 };
        return ref numbers;
    }
}

(released in April)

Please add its support to TryRoslyn.

Navigate to bookmark when already on site fails

When already on the site, if I try to navigate to a saved bookmark, the browser's location bar is updated, but the contents aren't - I have to open each bookmark in a new tab to get the right contents. However, if I hit enter on the changed location bar, the contents are updated.

abspos change in flex spec breaks header

Hey @ashmind,

The header breaks due to the update in the flex spec. This can currently be seen in Project Spartan and Mozilla and Google are currently updating their behavior to match. On twitter you requested screensize, this is on 1920 x 1080. Let me know if you have any questions. Thanks!!

Lambda not called in array initialisation

Putting the following input in the standard C class/M method

Func<int, int> getInt = s => s;
var list = new [] { 1, 2, 3, getInt(1) };
Console.WriteLine(list[3]);

results in decompiled C# output containing

int[] array = new int[] {
    1,
    2,
    3,
    0
};
Console.WriteLine(array[3]);

in debug mode and

Console.WriteLine(new int[] {
    1,
    2,
    3,
    0
}[3]);

in release mode. The IL output looks like it does show a lambda call.

using System;
public class Point(int x)
{
    public int X { get; } = x;
    public int M(Point p) 
    {
        return (p?.X).GetValueOrDefault();
    }
}

is decompiled to

using System;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Security;
using System.Security.Permissions;
[assembly: AssemblyVersion("0.0.0.0")]
[assembly: CompilationRelaxations(8)]
[assembly: RuntimeCompatibility(WrapNonExceptionThrows = true)]
[assembly: SecurityPermission(SecurityAction.RequestMinimum, SkipVerification = true)]
[module: UnverifiableCode]
public class Point
{
    [CompilerGenerated]
    private readonly int <X>k__BackingField;
    public int X
    {
        [CompilerGenerated]
        get
        {
            return this.<X>k__BackingField;
        }
    }
    public Point(int x)
    {
        this.<X>k__BackingField = x;
        base(); // This is not valid C#, but it represents the IL correctly.

    }
    public int M(Point p)
    {
        return p != null ? new int?(p.X) : null.GetValueOrDefault();
    }
}

Should be

return (p != null ? new int?(p.X) : null).GetValueOrDefault();