[cfe-dev] Adding a rewrite class to Clang

[Jacob Carlborg]

Hi

My goal is to create a source to source translator that translates 
Objective-C header files into D files. From what I've read here in this 
list I should create a rewrite class, something like RewriteObjC.cpp.

I started by modifying RewriteObjC.cpp but then thought that it would be 
better to add a new rewrite class. I modified the source code for Clang 
and added a new file called RewriteObjCToD.cpp by copying the existing 
RewriteObjC.cpp then I added a new command line option to Clang to be 
able to use the new rewrite class. After compiling everything I tried to 
run Clang using "clang --help" and got this error:

<FlagClass Name:"-rewrite-objc">
<FlagClass Name:"-rewrite-objc-to-d">
Assertion failed: (0 && "Options are not in order!"), function OptTable, 
file OptTable.cpp, line 119.
0  clang             0x00000001013764c2 PrintStackTrace(void*) + 34
1  clang             0x0000000101377163 SignalHandler(int) + 707
2  libSystem.B.dylib 0x000000010206435a _sigtramp + 26
3  libSystem.B.dylib 0x0000000102400000 _sigtramp + 3783872
4  clang             0x000000010001e9d2 __assert_rtn + 66
5  clang             0x00000001000aebec 
clang::driver::OptTable::OptTable(clang::driver::OptTable::Info const*, 
unsigned int) + 780
6  clang             0x00000001000a8a7a 
clang::driver::createDriverOptTable() + 42
7  clang             0x000000010009f6ef 
clang::driver::Driver::Driver(llvm::StringRef, llvm::StringRef, 
llvm::StringRef, bool, bool, clang::Diagnostic&) + 111
8  clang             0x0000000100025e90 main + 1360
9  clang             0x000000010001eca8 start + 52
Stack dump:
0.	Program arguments: ./clang --help
Illegal instruction

So how do I correctly add a new command line option to Clang or is there 
a better way to quickly get up and running with a new rewrite class?

-- 
/Jacob Carlborg