util: remove obsolete backport of std::to_string

Change-Id: Ib2ba051b84032b227ce75f41e242af20b4a43c3c

.waf-tools/compiler-features.py

@@ -1,30 +0,0 @@
-# -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
-
-from waflib.Configure import conf
-
-STD_TO_STRING = '''
-#include <string>
-int
-main()
-{
-  std::string s = std::to_string(0);
-  s = std::to_string(0l);
-  s = std::to_string(0ll);
-  s = std::to_string(0u);
-  s = std::to_string(0ul);
-  s = std::to_string(0ull);
-  s = std::to_string(0.0f);
-  s = std::to_string(0.0);
-  s = std::to_string(0.0l);
-  s.clear();
-}
-'''
-
-@conf
-def check_std_to_string(self):
-    if self.check_cxx(msg='Checking for std::to_string',
-                      fragment=STD_TO_STRING, mandatory=False):
-        self.define('HAVE_STD_TO_STRING', 1)
-
-def configure(conf):
-    conf.check_std_to_string()

ndn-cxx/detail/common.hpp

@@ -73,6 +73,7 @@ using std::dynamic_pointer_cast;
 using std::const_pointer_cast;
 
 using std::function;
+using std::to_string;
 
 using namespace std::string_literals;
 

ndn-cxx/util/backports.hpp

@@ -28,29 +28,10 @@
 #include <boost/predef/compiler/gcc.h>
 #include <boost/predef/compiler/visualc.h>
 
-#ifndef NDN_CXX_HAVE_STD_TO_STRING
-#include <boost/lexical_cast.hpp>
-#endif
-
 #include <utility>
 
 namespace ndn {
 
-//
-// https://redmine.named-data.net/issues/2743
-// std::to_string() (C++11)
-//
-#ifdef NDN_CXX_HAVE_STD_TO_STRING
-using std::to_string;
-#else
-template<typename T>
-std::string
-to_string(const T& val)
-{
-  return boost::lexical_cast<std::string>(val);
-}
-#endif // NDN_CXX_HAVE_STD_TO_STRING
-
 //
 // https://wg21.link/P1682
 // std::to_underlying() (C++23)

wscript

@@ -9,8 +9,8 @@ GIT_TAG_PREFIX = 'ndn-cxx-'
 
 def options(opt):
     opt.load(['compiler_cxx', 'gnu_dirs', 'c_osx'])
-    opt.load(['cross', 'default-compiler-flags', 'compiler-features',
-              'coverage', 'pch', 'sanitizers', 'osx-frameworks',
+    opt.load(['cross', 'default-compiler-flags', 'pch',
+              'coverage', 'sanitizers', 'osx-frameworks',
               'boost', 'openssl', 'sqlite3',
               'doxygen', 'sphinx_build'],
              tooldir=['.waf-tools'])
@@ -69,9 +69,9 @@ def configure(conf):
     if not conf.options.enable_shared and not conf.options.enable_static:
         conf.fatal('Either static library or shared library must be enabled')
 
-    conf.load(['cross', 'compiler_cxx', 'gnu_dirs', 'c_osx',
-               'default-compiler-flags', 'compiler-features',
-               'pch', 'osx-frameworks', 'boost', 'openssl', 'sqlite3',
+    conf.load(['compiler_cxx', 'gnu_dirs', 'c_osx',
+               'cross', 'default-compiler-flags', 'pch',
+               'osx-frameworks', 'boost', 'openssl', 'sqlite3',
                'doxygen', 'sphinx_build'])
 
     conf.env.WITH_TESTS = conf.options.with_tests