cppfilt

This library provides bindings to the system ABI-exposed C++ name demangling routines. It provides both IO-based API in the System.Demangle module and the pure one in System.Demangle.Pure. The latter is deduced as unsafe due to unsafePerformIO (which should be fine, though, since demangling is hopefully referentially transparent).

Supported systems

For now demangling is done using either libstdc++ or libc++ (controlled via the use-libcpp build flag). Adding support for other ABIs in a similar fashion should be easy.

This approach is probably suboptimal, though, since one might want to try different ABIs that might be available simultaneously (since even clang and gcc mangle some names slightly differently), but it's not entirely obvious what the API should be like in this case.