anderslanglands / babble Goto Github PK

We need a mechanism for binding constants, both constexpr/static const globals and constexpr static const class members which will want to be converted to #defines on the C API.

Currently the rust plugin will fail to run if BABBLE_PLUGIN_PATH is not set. Since we distribute this with babble itself, we should automatically add the relative path to it in bbl_translate_binding

We'll need to use the same sort of infrastructure as for stdfunction wrapping, but:

• we'll need to generate trampolines for each virtual method in the base class we're inheriting from
• the user will need to pass a virtual function table in to the generated constructors

I'm trying to build babble on mac (#10 branch). I'm compiling with the homebrew-installed llvm and zig cc as a compiler as it uses its own toolchain and avoids some of the problems I've been having with native/homebrew clang. The full build script is
CC=zig-cc CXX=zig-c++ cmake -S . -B build -G Ninja -DCMAKE_INSTALL_PREFIX=install -DLLVM_DIR=/usr/local/Cellar/llvm/17.0.6_1/lib/cmake/llvm/ && cmake --build build

(zig-cc and zig-c++ are just files installed in ~/.local/bin containing zig c++ $@ etc.).

I'm getting this issue with the tests where bbl-translate is run:

[13/31] Linking CXX static library test/stdfunction/libstdfunction-bind-dummy.a
/Library/Developer/CommandLineTools/usr/bin/ranlib: file: test/stdfunction/libstdfunction-bind-dummy.a(bind.cpp.o) has no symbols
[16/31] Generating smartptr-c.cpp
FAILED: test/smartptr/smartptr-c.cpp /Users/ashley/babble/build/test/smartptr/smartptr-c.cpp
cd /Users/ashley/babble/build/test/smartptr && /Users/ashley/babble/build/bbl/bbl-translate /Users/ashley/babble/test/smartptr/bind.cpp -- -std=c++17 -fsyntax-only -fno-spell-checking -I/usr/local/opt/llvm/lib/clang/17/include -I/Users/ashley/babble/bbl/include -I/Users/ashley/babble/test/smartptr -- smartptr -o /Users/ashley/babble/build/test/smartptr
/Users/ashley/babble/test/smartptr/bind.cpp:1:10: fatal error: cannot open file '/Users/ashley/babble/test/smartptr/babble': No such file or directory
    1 | #include "babble"
      |          ^
[2024-01-30 16:13:10.335] [info] [cpp_context.cpp:2872] ASTs built in 1.0951439109999999s
[2024-01-30 16:13:10.340] [error] [api_cpp_context.cpp:45] /Users/ashley/babble/bbl/src/cpp_context.cpp:2885 compilation generated 3045 errors. Cannot continue
[2024-01-30 16:13:10.341] [error] [bbl-translate.cpp:491] extraction failed after 1.1113919739999998s

I don't really know what to make of it.

Currently the translation layer has no access to the location of the original decls. Need to add a

struct Location {
    std::string filename;
    int line;
    int col;
};

or similar to each that would be filled during extraction in order to be able to point users to where a decl came from in case of error