-/**
- * Return the demangled (prettyfied) version of a C++ type.
- *
- * This function tries to produce a human-readable type, but the type name will
- * be returned unchanged in case of error or if demangling isn't supported on
- * your system.
- *
- * Use for debugging -- do not rely on demangle() returning anything useful.
- *
- * This function may allocate memory (and therefore throw std::bad_alloc).
- */
-fbstring demangle(const char* name);
-inline fbstring demangle(const std::type_info& type) {
- return demangle(type.name());
-}
-
-/**
- * Return the demangled (prettyfied) version of a C++ type in a user-provided
- * buffer.
- *
- * The semantics are the same as for snprintf or strlcpy: bufSize is the size
- * of the buffer, the string is always null-terminated, and the return value is
- * the number of characters (not including the null terminator) that would have
- * been written if the buffer was big enough. (So a return value >= bufSize
- * indicates that the output was truncated)
- *
- * This function does not allocate memory and is async-signal-safe.
- *
- * Note that the underlying function for the fbstring-returning demangle is
- * somewhat standard (abi::__cxa_demangle, which uses malloc), the underlying
- * function for this version is less so (cplus_demangle_v3_callback from
- * libiberty), so it is possible for the fbstring version to work, while this
- * version returns the original, mangled name.
- */
-size_t demangle(const char* name, char* buf, size_t bufSize);
-inline size_t demangle(const std::type_info& type, char* buf, size_t bufSize) {
- return demangle(type.name(), buf, bufSize);
-}
-
-/**
- * Debug string for an exception: include type and what().
- */
-inline fbstring exceptionStr(const std::exception& e) {
- return folly::to<fbstring>(demangle(typeid(e)), ": ", e.what());
-}
-
-inline fbstring exceptionStr(std::exception_ptr ep) {
- try {
- std::rethrow_exception(ep);
- } catch (const std::exception& e) {
- return exceptionStr(e);
- } catch (...) {
- return "<unknown exception>";
- }
-}
-