ceph/src/include/types_fmt.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 #pragma once
   4 /**
   5  * \file fmtlib formatters for some types.h classes
   6  */
   7
   8 #include <fmt/format.h>
   9
  10 #include <string_view>
  11
  12 #include "include/types.h"
  13
  14 template <class A, class B, class Comp, class Alloc>
  15 struct fmt::formatter<std::map<A, B, Comp, Alloc>> {
  16   constexpr auto parse(format_parse_context& ctx) { return ctx.begin(); }
  17
  18   template <typename FormatContext>
  19   auto format(const std::map<A, B, Comp, Alloc>& m, FormatContext& ctx)
  20   {
  21     std::string_view sep = "{";
  22     for (const auto& [k, v] : m) {
  23       fmt::format_to(ctx.out(), "{}{}={}", sep, k, v);
  24       sep = ",";
  25     }
  26     return fmt::format_to(ctx.out(), "}}");
  27   }
  28 };