https://github.com/baronfel/ilverify-fsharp-error-demo

https://github.com/baronfel/ilverify-fsharp-error-demo

Last synced: 9 days ago
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• Host: GitHub
• URL: https://github.com/baronfel/ilverify-fsharp-error-demo
• Owner: baronfel
• Created: 2020-08-12T15:47:06.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2020-08-12T15:47:19.000Z (over 4 years ago)
• Last Synced: 2024-10-20T08:56:25.495Z (27 days ago)
• Language: C#
• Size: 1.95 KB
• Stars: 1
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# ILVerify test harness for c#/f# code difference

The ilverify tool doesn't like the IL generated by the F# compiler for this function call, but it is fine with that of the C# compiler.

This repo exists to demonstrate the problem and see what the solution is.

## Test C\#

cd to `ilver` and run `dotnet build`, then run `ilverify bin/Debug//ilver.dll -r /*.dll`

You'll get something like

```

> ilverify bin/Debug/net5.0/ilver.dll -r /usr/local/share/dotnet/shared/Microsoft.NETCore.App/5.0.0-preview.6.20305.6/*.dll -t --statistics

All Classes and Methods in /Users/chethusk/scratch/ilverify-check/ilver/bin/Debug/net5.0/ilver.dll Verified.

Types found: 2

Types verified: 2

Methods found: 2

Methods verified: 2

```

## Test F\#

cd to `ilverfs` and run `dotnet build`, then run `ilverify bin/Debug//ilverfs.dll -r /*.dll`

You'll get something like

```

> ilverify bin/Debug/net5.0/ilverfs.dll -r /usr/local/share/dotnet/shared/Microsoft.NETCore.App/5.0.0-preview.6.20305.6/*.dll -t --statistics

[IL]: Error [StackUnexpected]: [/Users/chethusk/scratch/ilverify-check/ilverfs/bin/Debug/net5.0/ilverfs.dll : .ilverfs::relative(string)][offset 0x0000000B][found Char] Unexpected type on the stack.

1 Error(s) Verifying /Users/chethusk/scratch/ilverify-check/ilverfs/bin/Debug/net5.0/ilverfs.dll

Types found: 5

Types verified: 5

Methods found: 1

Methods verified: 1

```

## IL generated for C\#

(taken from [sharplab](https://sharplab.io/#v2:C4LglgNgNAJiDUAfAAgJgIwFgBQyDMABGgQMIEDeOB1Rhy6AbAQMrABOYAdgOYFsCmEAIbAwAN34EAFKw48CAZ37cAtv07AAlBSo09yAOyLlajQDoAKhxWshbYFM78A7gG0AuuQDkAei8BfTQBuXWp/HH8gA)):

```il

// Methods

    .method public hidebysig static 

        string relative (

            string segment

        ) cil managed 

    {

        // Method begins at RVA 0x2050

        // Code size 23 (0x17)

        .maxstack 5

        .locals init (

            [0] string

        )

        IL_0000: nop

        IL_0001: ldarg.0

        IL_0002: ldc.i4.1

        IL_0003: newarr [System.Private.CoreLib]System.Char

        IL_0008: dup

        IL_0009: ldc.i4.0

        IL_000a: ldc.i4.s 47

        IL_000c: stelem.i2

        IL_000d: callvirt instance string [System.Private.CoreLib]System.String::TrimStart(char[])

        IL_0012: stloc.0

        IL_0013: br.s IL_0015

        IL_0015: ldloc.0

        IL_0016: ret

    }

```

## IL generated for F\#

(taken from [sharplab](https://sharplab.io/#v2:DYLgZgzgNALiCWwoBMQGoA+ACLwCmMWATnsAIYzwBueWAFBHgOYC2eAdoSFhDEfOyYBKLAF4AsACgcMnszacAdABV+LAMowyRQgG1sAcgD0BrBgC6QA=))

```il

.method public static 

        class [System.Private.CoreLib]System.String relative (

            class [System.Private.CoreLib]System.String segment

        ) cil managed 

    {

        // Method begins at RVA 0x2050

        // Code size 22 (0x16)

        .maxstack 8

        IL_0000: ldarg.0

        IL_0001: ldc.i4.1

        IL_0002: newarr [System.Private.CoreLib]System.Char

        IL_0007: dup

        IL_0008: ldc.i4.0

        IL_0009: ldc.i4.s 47

        IL_000b: stelem [System.Private.CoreLib]System.Char

        IL_0010: callvirt instance string [System.Private.CoreLib]System.String::TrimStart(char[])

        IL_0015: ret

    }

```