src/common/format.hpp

   1 /*
   2  * Copyright (C) 2022 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   3  *
   4  * SPDX-License-Identifier: LGPL-2.1-only
   5  *
   6  */
   7 #ifndef LTTNG_FORMAT_H
   8 #define LTTNG_FORMAT_H
   9
  10 #include <common/macros.hpp>
  11
  12 #include <string>
  13 #include <cxxabi.h>
  14
  15 DIAGNOSTIC_PUSH
  16 DIAGNOSTIC_IGNORE_SUGGEST_ATTRIBUTE_FORMAT
  17 DIAGNOSTIC_IGNORE_DUPLICATED_BRANCHES
  18 #define FMT_HEADER_ONLY
  19 #include <vendor/fmt/core.h>
  20 DIAGNOSTIC_POP
  21
  22 /*
  23  * Due to a bug in g++ < 7.1, this specialization must be enclosed in the fmt namespace,
  24  * see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56480.
  25  */
  26 namespace fmt {
  27 template <>
  28 struct formatter<std::type_info> : formatter<std::string> {
  29         template <typename FormatCtx>
  30         typename FormatCtx::iterator format(const std::type_info& type_info, FormatCtx& ctx)
  31         {
  32                 int status;
  33                 auto demangled_name = abi::__cxa_demangle(type_info.name(), nullptr, 0, &status);
  34                 auto it = status == 0 ? formatter<std::string>::format(demangled_name, ctx) :
  35                                         formatter<std::string>::format(type_info.name(), ctx);
  36
  37                 free(demangled_name);
  38                 return it;
  39         }
  40 };
  41 } /* namespace fmt */
  42
  43 #endif /* LTTNG_FORMAT_H */