Rolf's excellent Visual Basic compiler was able to bootstrap itself a few weeks ago on Windows, but it did not work with Mono yet.
The compiler needed the VB runtime to be upgraded, it required a few fixes in the way we handle interface implementation for generics in the Mono VM, the final bug today was reference file names with their proper casing.
Also Rolf's compiler contained a few MS-specific hacks in the compiler, but those are no longer necessary so this afternoon the VB compiler was able to build Hello World on Linux:
$ mono vbnc.exe a.vb DEBUG RUN Visual Basic.Net Compiler version 0.0.0.4706 (last write time: 05/09/2006 21:06:28) Copyright (C) 2004-2006 Rolf Bjarne Kvinge. All rights reserved. Starting Scan Scanning file /home/cvs/vbnc/vbnc/bin/a.vb File '/home/cvs/vbnc/vbnc/bin/a.vb' scanned in 0.118 seconds 7 lines and 115 characters in total. After SCAN: True Starting Conditional Compilation After ConditionaL True Starting Parse Parsing file /home/cvs/vbnc/vbnc/bin/a.vb (1 of 1 files) 3 assemblies were loaded. 73 namespaces were loaded. 2129 types were loaded. Starting Resolve Starting Resolve CreateImplicitTypes compiler (1 of 1 types) ResolveType compiler (1 of 1 types) ResolveTypeReferences compiler (1 of 1 types) CreateImplicitMembers compiler (1 of 1 types) ResolveMembers compiler (1 of 1 types) ResolveCode compiler (1 of 1 types) Finished Resolve DefineTypes compiler (1 of 1 types) DefineTypeParameters compiler (1 of 1 types) DefineTypeHierarchy compiler (1 of 1 types) DefineMembers compiler (1 of 1 types) Starting Emit Emit compiler (1 of 1 types) CreateType compiler (1 of 1 types) Creating: compiler Created: compiler Assembly 'a, Version=0.0.0.0, Culture=neutral' saved successfully to '/home/cvs/vbnc/vbnc/bin/a.exe'. Compilation successful
The "DEBUG" run is a tiny bit verbose as you can see, the results are mind blowing:
mono$ cat a.vb public class compiler shared function Main as integer Console.WriteLine ("Dingus") return 0 End function end class mono$ mono a.exe Dingus
Am actually scared of trying to bootstrap on Mono, I do not know if there are enough pixels in my machine to build the 68,000 lines of VB that the compiler has.