CODEWITHSUNDEEP
c#c++.netc++-cli
lars
lars

Reputation: 668

Internal compiler error in C++/CLI Code

I translated following C# code

using (var a = new A(args1...))
{
    using (var b = new A(args2...))
    {
        dostuff(a,b);
    }
}

into C++/CLI Code like this:

try
{
    a = gcnew A(args1...);
    b = gcnew A(args2...);

    dostuff(a, b);
}
finally
{
    if (a != nullptr)
        delete a;
    if (b != nullptr)
        delete b;
}

Types A, B, dostuff() are part of a .NET library. I dont have the source code of that library.

The library received an update, a constructor got an additional argument.

Now it got messy. I added the additional argument (a string^) to both calls (C++/CLI and C#).

Now C# runs just fine, C++/CLI gives an internal compiler error.

fatal error C1001: An internal error has occurred in the compiler. (compiler file 'f:\dd\vctools\compiler\cxxfe\sl\p1\c\cpimport.cpp', line 16424)

VS2017 latest updates

@Some programmer dude: Yes, but atm of the implementation i wasn't certain it is the case in CLI too. Now i know.

@Hans passant: The code worked previously, so i'm pretty sure thats not the case here. I could minimize the example further.

Actually A and B are actually not different types. 'A' has a constructor of the form (c#):

A(System.IO.Stream stream); // old version
A(System.IO.Stream stream, string filename); // new version

Now the following single line leads to the internal error (c++):

A^ a = gcnew A( System::IO::File::Open(filename, System::IO::FileMode::Create), filename);

Upvotes: 0

Views: 413

Answers (1)

xMRi
xMRi

Reputation: 15375

The code seams ok, I don't know why you get a compiler error but the code might be written much easier.

Simply use the C++/CLI stack semantics:

{ 
  A a{args1...};
  B b{args2...};

  dostuff(%a, %b);
}

This implies all IDispose using stuff you need.

Upvotes: 2

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