cxa_demangle example

#include <cxxabi.h>inline const char *demangle_typename(const char *name){    int status = -1;    char *dem = abi::__cxa_demangle(name, 0, 0, &status);    if(status == 0)        return dem;    else        return 0;}voidreport_exception(const std::exception &ex){    using std::strcmp;    using std::strncmp;    const char *ex_name = typeid(ex).name();    const char *ex_dem  = demangle_typename(ex_name);    const char *ex_what = ex.what();    if(ex_dem == 0)        ex_dem = ex_name;    // some demanglers stick "class" at the beginning of their output,    // which looks dumb in this context    if(!strncmp(ex_dem, "class ", 6))        ex_dem += 6;    // only print what() if it's interesting, i.e. nonempty and    // different from the name (mangled or otherwise) of the    // exception type.    if(ex_what == 0 || ex_what[0] == 0 || !strcmp(ex_what, ex_name))        cerr << ex_dem << endl;    else        cerr << ex_dem << ": " << ex_what << endl;}