Example use of the Itanium ABI demangling API.

demangle.cpp

#include <cxxabi.h>

#include <cstdlib>
#include <cstddef>

#include <iostream>
#include <memory>

struct clib_free {
    template<typename T>
    void operator() (T *t) {
        std::free(t);
    }
};

static std::string demangle(char const *mangled) {
  int status;
  std::size_t n;
  std::unique_ptr<char[], clib_free> demangled(abi::__cxa_demangle(mangled, nullptr, &n, &status));
  switch (status) {
    case -1:
      throw std::bad_alloc();
    case -2:
      throw std::runtime_error("invalid mangled name");
    case -3:
      abort();
  }
  return std::string(demangled.get(), n-1);
}

int main() {
  std::cout << demangle("_Z3foodc") << '\n';
  std::cout << demangle("i") << '\n';
}