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@kaizen_nagoya(Dr. Kiyoshi Ogawa)

C++17 - The Complete Guide clang++とg++でコンパイルしてみた(1) lang

Last updated at Posted at 2018-06-16

C++17 - The Complete Guide by Nicolai M. Josuttis
http://www.josuttis.com/cppstd17/

C++17 - The Complete Guide clang++とg++でコンパイルしてみた(まとめ)
https://qiita.com/kaizen_nagoya/items/c000f307e642990781e1

目的(purpose)

C++17 - the complete guideコンパイル記録は、コンパイラおよび対応標準、コンパイラの版により、コンパイルエラーMessageの違いを記録し、どのエラーが出たら、どの版またはどの対応標準にすればエラーが少なくなるかを考察するための資料の第一歩です。

成果(outcome)

(1)コンパイラの種類、対応標準の違いによってエラーの数が違う。
(2)同じエラーであってもMessageの表現が違う。
(3) Error Messageのネットで検索する際に役立つ。

編纂器(compiler)

clang++

clang version 6.0.0 (tags/RELEASE_600/final)
Target: x86_64-apple-darwin17.5.0
Thread model: posix
InstalledDir: /usr/local/opt/llvm/bin

g++

g++ (Homebrew GCC 8.1.0) 8.1.0
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

一覧(list) lang

clang++ g++
error warning link error execute error 出力備考 error warning link error execute error 出力備考 c/g
aggr14.cpp 1 意図的誤 1 1 意図的誤 警告の無有
alignednew11.cpp 1 1
alignednew17.cpp 出力無 出力無
alignednewincomp.cpp 1 出力無 1 出力無
evalexcept.cpp ◯ ◯
factory.cpp 2 出力無 1 出力無 警告の数
hexfloat.cpp ◯ ◯
inlinethreadlocal1.cpp foo() inlinethreadlocal2と一緒にコンパイル foo() inlinethreadlocal2と一緒にコンパイル
inlinethreadlocal2.cpp _main 同上 _main 同上
lambdathis.cpp ◯ ◯
noexceptcalls.cpp 1 1
structbind1.cpp 3 ◯ ◯ 警告の有無
structbind2.cpp 3 ◯ ◯ 警告の有無
tracknew.cpp 1 1

編纂実行(Compile and go) lang

aggr14

aggr14
clang++ lang/aggr14.cpp -std=c++2a -Wall
lang/aggr14.cpp:16:14: error: base class 'Base' has private default constructor
  Derived d1{};    // ERROR since C++17
             ^
lang/aggr14.cpp:7:3: note: declared private here
  Base() {
  ^
1 error generated.
g++ lang/aggr14.cpp -std=c++2a -Wall
lang/aggr14.cpp: In function 'int main()':
lang/aggr14.cpp:16:14: error: 'Base::Base()' is private within this context
   Derived d1{};    // ERROR since C++17
              ^
lang/aggr14.cpp:7:3: note: declared private here
   Base() {
   ^~~~
lang/aggr14.cpp:16:11: warning: unused variable 'd1' [-Wunused-variable]
   Derived d1{};    // ERROR since C++17
           ^~

alignednew11

alignednew11
clang++ lang/alignednew11.cpp -std=c++2a -Wall
In file included from lang/alignednew11.cpp:2:
lang/alignednew11.hpp:7:10: fatal error: 'malloc.h' file not found
#include <malloc.h>  // for _aligned_malloc() or memalign()
         ^~~~~~~~~~
1 error generated.
g++ lang/alignednew11.cpp -std=c++2a -Wall
In file included from lang/alignednew11.cpp:2:
lang/alignednew11.hpp:7:10: fatal error: malloc.h: No such file or directory
 #include <malloc.h>  // for _aligned_malloc() or memalign()
          ^~~~~~~~~~
compilation terminated.

alignednew17

alignednew17
clang++ lang/alignednew17.cpp -std=c++2a -Wall
g++ lang/alignednew17.cpp -std=c++2a -Wall

alignednewincomp

alignednewincomp
clang++ lang/alignednewincomp.cpp -std=c++2a -Wall
lang/alignednewincomp.cpp:18:6: warning: unused variable 'p' [-Wunused-variable]
  S* p = new S;  // calls our operator new only before C++17
     ^
1 warning generated.
g++ lang/alignednewincomp.cpp -std=c++2a -Wall
lang/alignednewincomp.cpp: In function 'int main()':
lang/alignednewincomp.cpp:18:6: warning: unused variable 'p' [-Wunused-variable]
   S* p = new S;  // calls our operator new only before C++17
      ^

evalexcept

evalexcept
clang++ lang/evalexcept.cpp -std=c++2a -Wall
value: 7
value: 14
value: 21
value: 28
value: EXCEPTION: vector
g++ lang/evalexcept.cpp -std=c++2a -Wall
value: 7
value: 14
value: 21
value: 28
value: EXCEPTION: vector::_M_range_check: __n (which is 4) >= this->size() (which is 4)

factory

factory
clang++ lang/factory.cpp -std=c++2a -Wall
lang/factory.cpp:9:20: warning: unused variable 'ai' [-Wunused-variable]
  std::atomic<int> ai = create<std::atomic<int>>(42);
                   ^
lang/factory.cpp:7:7: warning: unused variable 'i' [-Wunused-variable]
  int i = create<int>(42);
      ^
2 warnings generated.
g++ lang/factory.cpp -std=c++2a -Wall
lang/factory.cpp: In function 'int main()':
lang/factory.cpp:7:7: warning: unused variable 'i' [-Wunused-variable]
   int i = create<int>(42);
       ^

hexfloat

hexfloat
clang++ lang/hexfloat.cpp -std=c++2a -Wall
dec:     16  hex: 0x1p+4
dec:     10  hex: 0x1.4p+3
dec:     40  hex: 0x1.4p+5
dec:      5  hex: 0x1.4p+2
dec:      5  hex: 0x1.4p+2
dec: 100000  hex: 0x1.86ap+16
dec: 100000  hex: 0x1.86ap+16
dec: 49.625  hex: 0x1.8dp+5
g++ lang/hexfloat.cpp -std=c++2a -Wall
dec:     16  hex: 0x1p+4
dec:     10  hex: 0x1.4p+3
dec:     40  hex: 0x1.4p+5
dec:      5  hex: 0x1.4p+2
dec:      5  hex: 0x1.4p+2
dec: 100000  hex: 0x1.86ap+16
dec: 100000  hex: 0x1.86ap+16
dec: 49.625  hex: 0x1.8dp+5

inlinethreadlocal1

inlinethreadlocal1
clang++ lang/inlinethreadlocal1.cpp -std=c++2a -Wall
Undefined symbols for architecture x86_64:
  "foo()", referenced from:
      _main in inlinethreadlocal1-6e3ff4.o
ld: symbol(s) not found for architecture x86_64
clang-6.0: error: linker command failed with exit code 1 (use -v to see invocation)
g++ lang/inlinethreadlocal1.cpp -std=c++2a -Wall
Undefined symbols for architecture x86_64:
  "foo()", referenced from:
      _main in cckxcA6w.o
ld: symbol(s) not found for architecture x86_64
collect2: error: ld returned 1 exit status

inlinethreadlocal2

inlinethreadlocal2
clang++ lang/inlinethreadlocal2.cpp -std=c++2a -Wall
Undefined symbols for architecture x86_64:
  "_main", referenced from:
     implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
clang-6.0: error: linker command failed with exit code 1 (use -v to see invocation)
g++ lang/inlinethreadlocal2.cpp -std=c++2a -Wall
Undefined symbols for architecture x86_64:
  "_main", referenced from:
     implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
collect2: error: ld returned 1 exit status

lambdathis

lambdathis
clang++ lang/lambdathis.cpp -std=c++2a -Wall
c1
g++ lang/lambdathis.cpp -std=c++2a -Wall
c1

noexceptcalls

noexceptcalls
clang++ lang/noexceptcalls.cpp -std=c++2a -Wall
lang/noexceptcalls.cpp:20:3: error: no matching function for call to 'call'
  call(f1, f2);  // ERROR since C++17
  ^~~~
lang/noexceptcalls.cpp:5:6: note: candidate template ignored: deduced conflicting types for parameter 'T' ('void (*)()' vs. 'void (*)() noexcept')
void call(T op1, T op2)
     ^
1 error generated.
g++ lang/noexceptcalls.cpp -std=c++2a -Wall
lang/noexceptcalls.cpp: In function 'int main()':
lang/noexceptcalls.cpp:20:14: error: no matching function for call to 'call(void (&)(), void (&)() noexcept)'
   call(f1, f2);  // ERROR since C++17
              ^
lang/noexceptcalls.cpp:5:6: note: candidate: 'template<class T> void call(T, T)'
 void call(T op1, T op2)
      ^~~~
lang/noexceptcalls.cpp:5:6: note:   template argument deduction/substitution failed:
lang/noexceptcalls.cpp:20:14: note:   deduced conflicting types for parameter 'T' ('void (*)()' and 'void (*)() noexcept')
   call(f1, f2);  // ERROR since C++17
              ^

structbind1

structbind1
clang++ lang/structbind1.cpp -std=c++2a -Wall
In file included from lang/structbind1.cpp:2:
lang/structbind1.hpp:7:1: warning: 'tuple_size' defined as a struct template here but previously declared as a class template [-Wmismatched-tags]
struct std::tuple_size<Customer> {
^
/usr/local/Cellar/llvm/6.0.0/include/c++/v1/__tuple:25:22: note: did you mean struct here?
template <class _Tp> class _LIBCPP_TEMPLATE_VIS tuple_size;
                     ^
In file included from lang/structbind1.cpp:2:
lang/structbind1.hpp:12:1: warning: 'tuple_element' defined as a struct template here but previously declared as a class template [-Wmismatched-tags]
struct std::tuple_element<2, Customer> {
^
/usr/local/Cellar/llvm/6.0.0/include/c++/v1/__tuple:57:34: note: did you mean struct here?
template <size_t _Ip, class _Tp> class _LIBCPP_TEMPLATE_VIS tuple_element;
                                 ^
In file included from lang/structbind1.cpp:2:
lang/structbind1.hpp:16:1: warning: 'tuple_element' defined as a struct template here but previously declared as a class template [-Wmismatched-tags]
struct std::tuple_element<Idx, Customer> {
^
/usr/local/Cellar/llvm/6.0.0/include/c++/v1/__tuple:57:34: note: did you mean struct here?
template <size_t _Ip, class _Tp> class _LIBCPP_TEMPLATE_VIS tuple_element;
                                 ^
3 warnings generated.
f/l/v:    Tim Starr 42
f/l/v:     Waters 52
c:        Tim Starr 42
s:        Tim
g++ lang/structbind1.cpp -std=c++2a -Wall
f/l/v:    Tim Starr 42
f/l/v:     Waters 52
c:        Tim Starr 42
s:        Tim

structbind2

structbind2
clang++ lang/structbind2.cpp -std=c++2a -Wall
In file included from lang/structbind2.cpp:2:
lang/structbind2.hpp:7:1: warning: 'tuple_size' defined as a struct template here but previously declared as a class template [-Wmismatched-tags]
struct std::tuple_size<Customer> {
^
/usr/local/Cellar/llvm/6.0.0/include/c++/v1/__tuple:25:22: note: did you mean struct here?
template <class _Tp> class _LIBCPP_TEMPLATE_VIS tuple_size;
                     ^
In file included from lang/structbind2.cpp:2:
lang/structbind2.hpp:12:1: warning: 'tuple_element' defined as a struct template here but previously declared as a class template [-Wmismatched-tags]
struct std::tuple_element<2, Customer> {
^
/usr/local/Cellar/llvm/6.0.0/include/c++/v1/__tuple:57:34: note: did you mean struct here?
template <size_t _Ip, class _Tp> class _LIBCPP_TEMPLATE_VIS tuple_element;
                                 ^
In file included from lang/structbind2.cpp:2:
lang/structbind2.hpp:16:1: warning: 'tuple_element' defined as a struct template here but previously declared as a class template [-Wmismatched-tags]
struct std::tuple_element<Idx, Customer> {
^
/usr/local/Cellar/llvm/6.0.0/include/c++/v1/__tuple:57:34: note: did you mean struct here?
template <size_t _Ip, class _Tp> class _LIBCPP_TEMPLATE_VIS tuple_element;
                                 ^
3 warnings generated.
f/l/v:    Tim Starr 42
f2/l2/v2: Ringo Starr 52
c:        Ringo Starr 52
s:        Tim
g++ lang/structbind2.cpp -std=c++2a -Wall
f/l/v:    Tim Starr 42
f2/l2/v2: Ringo Starr 52
c:        Ringo Starr 52
s:        Tim

tracknew

tracknew
clang++ lang/tracknew.cpp -std=c++2a -Wall
In file included from lang/tracknew.cpp:2:
lang/tracknew.hpp:42:16: error: no member named 'aligned_alloc' in namespace 'std'
      p = std::aligned_alloc(align, size);  // C++17 API
          ~~~~~^
1 error generated.
g++ lang/tracknew.cpp -std=c++2a -Wall
In file included from lang/tracknew.cpp:2:
lang/tracknew.hpp: In static member function 'static void* TrackNew::allocate(std::size_t, std::size_t, const char*)':
lang/tracknew.hpp:42:16: error: 'aligned_alloc' is not a member of 'std'
       p = std::aligned_alloc(align, size);  // C++17 API
                ^~~~~~~~~~~~~
lang/tracknew.hpp:42:16: note: suggested alternative: 'aligned_union'
       p = std::aligned_alloc(align, size);  // C++17 API
                ^~~~~~~~~~~~~
                aligned_union

検討事項(agenda)

1)コンパイルエラーをなくす修正方法
1.1 inlinethreadlocal1, inlinethreadlocal2
２つのファイルをコンパイル対象に

$ clang++ ./lang/inlinethreadlocal1.cpp ./lang/inlinethreadlocal2.cpp -std=c++2a -Wall
$ ./a.out
main() begin:
- gName: global
- tName: tls
- lName: local
main() later:
- gName: thread1 name
- tName: thread1 name
- lName: thread1 name
foo() begin:
- gName: thread1 name
- tName: tls
- lName: local
foo() end:
- gName: thread2 name
- tName: thread2 name
- lName: thread2 name
main() end:
- gName: thread2 name
- tName: thread1 name
- lName: thread1 name
$ g++ ./lang/inlinethreadlocal1.cpp ./lang/inlinethreadlocal2.cpp -std=c++2a -Wall
$ ./a.out
main() begin:
- gName: global
- tName: tls
- lName: local
main() later:
- gName: thread1 name
- tName: thread1 name
- lName: thread1 name
foo() begin:
- gName: thread1 name
- tName: tls
- lName: local
foo() end:
- gName: thread2 name
- tName: thread2 name
- lName: thread2 name
main() end:
- gName: thread2 name
- tName: thread1 name
- lName: thread1 name

2)役に立つまたは意味のあるその他の出力

台本(script)

毎回コンパイル条件を変えてコンパイルするのに、一気にコンパイルする方法

cga.sh
#!/bin/bash
while read line
do
  echo "clang++ $line -std=c++2a -Wall"
  clang++ $line -std=c++2a -Wall 
  if [  -e a.out ]; then
  ./a.out
  rm a.out
  fi
  echo "g++ $line -std=c++2a -Wall"
  g++ $line -std=c++2a -Wall 
  if [  -e a.out ]; then
  ./a.out
  rm a.out
  fi
done < ./$1
do.sh
#!/bin/bash
while read line
do
 ls ./$line/*.cpp > ./$line/$line
 ./cga.sh ./$line/$line > $line.log.txt &> $line.log.txt
done < ./$1

参考資料(reference)

プログラミング言語教育のXYZ

https://qiita.com/kaizen_nagoya/items/1950c5810fb5c0b07be4
プログラミング言語教育のXYZ(youtube)
https://www.youtube.com/watch?v=He1_tg4px-w&t=486s

Autosar Guidelines C++14

Autosar Guidelines C++14 example code compile list(1-169)
https://qiita.com/kaizen_nagoya/items/8ccbf6675c3494d57a76

C++N4741 2018

Working Draft, Standard for Programming Language C++
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/n4741.pdf

C++N4741, 2018 Standard Working Draft on ISO/IEC 14882 sample code compile list
https://qiita.com/kaizen_nagoya/items/3294c014044550896010

C++N4606 2016

Working Draft, Standard for Programming Language C++
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/n4606.pdf

C++N4606, 2016符号断片編纂一覧(example code compile list)
Working Draft 2016, ISO/IEC 14882(1)
https://qiita.com/kaizen_nagoya/items/df5d62c35bd6ed1c3d43/

　CEDD(Compile Error Driven Design)

初めての　CEDD(Compile Error Driven Design) ８回直してコンパイル。
https://qiita.com/kaizen_nagoya/items/9494236aa1753f3fd1e1

コンパイルエラーを記録するとよい理由7つ
https://qiita.com/kaizen_nagoya/items/85c0e92b206883140e89
docker gnu(gcc/g++) and llvm(clang/clang++)
https://qiita.com/drafts/059874ea39c4de64c0f7

[C][C++]の国際規格案の例題をコンパイルするときの課題７つ。
https://qiita.com/kaizen_nagoya/items/5f4b155030259497c4de

C++N4606 Working Draft 2016, ISO/IEC 14882, C++ standardのコード断片をコンパイルするためにしていること
https://qiita.com/kaizen_nagoya/items/a8d7ee2f2e29e76c19c1

コンパイル用shell script C版(clangとgcc)とC++版(clang++とg++)
https://qiita.com/kaizen_nagoya/items/74220c0577a512c2d7da

Clang/Clang++(LLVM) gcc/g++(GNU) コンパイラ警告等比較
https://qiita.com/kaizen_nagoya/items/9a82b958cc3aeef0403f

C++2003とC++2017でコンパイルエラーになるならない事例集
https://qiita.com/kaizen_nagoya/items/a13ea3823441c430edff

Qiitaに投稿するCのStyle例(暫定)
https://qiita.com/kaizen_nagoya/items/946df1528a6a1ef2bc0d

cpprefjpのdecltypeをコンパイル試験
https://qiita.com/kaizen_nagoya/items/090909af702f0d5d8a67

MISRA C++ 5-0-16
https://qiita.com/kaizen_nagoya/items/7df2d4e05db724752a74

C++ Templates Part1 BASICS Chapter 3. Class Templates 3.2 Use of Class Template Stack stack1test.cpp
https://qiita.com/kaizen_nagoya/items/cd5fc49106fad5a4e9ed

ISO/IEC TS 17961:2013 C Secure Coding Rules(1) All list(to be confirmed)
https://qiita.com/kaizen_nagoya/items/54e056195c4f11b850a1

C言語（C++)に対する誤解、曲解、無理解、爽快。
https://qiita.com/kaizen_nagoya/items/3f3992c9722c1cee2e3a

C Puzzle Bookの有り難み5つ、C言語規格及びCコンパイラの特性を認識
https://qiita.com/kaizen_nagoya/items/d89a48c1536a02ecdec9

'wchar.h' file not found で困った clang++ macOS
https://qiita.com/kaizen_nagoya/items/de15cd46d657517fac11

Open POSIX Test Suiteの使い方を調べはじめました
https://qiita.com/kaizen_nagoya/items/644d5e407f5faf96e6dc

MISRA-C 2012 Referenceに掲載している文献の入手可能性を確認
https://qiita.com/kaizen_nagoya/items/96dc8b125e462d5575bb

どうやって MISRA Example Suiteをコンパイルするか
https://qiita.com/kaizen_nagoya/items/fbdbff5ff696e2ca7f00

MISRA C まとめ #include
https://qiita.com/kaizen_nagoya/items/f1a79a7cbd281607c7c9

「C++完全理解ガイド」の同意できること上位10
https://qiita.com/kaizen_nagoya/items/aa5744e0c4a8618c7671

文献履歴(document history)

ver. 0.10 初稿 20180616

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