はじめに(Introduction)
N4910 Working Draft, Standard for Programming Language C++
n4910は、ISO/IEC JTC1 SC22 WG21の作業原案(Working Draft)です。
公式のISO/IEC 14882原本ではありません。
ISO/IEC JTC1 SC22 WG21では、可能な限り作業文書を公開し、幅広い意見を求めています。
一連の記事はコード断片をコンパイルできる形にする方法を検討してコンパイル、リンク、実行して、規格案の原文と処理系(g++, Clang++)との違いを確認し、技術内容を検討し、ISO/IEC JTC1 SC22 WG21にフィードバックするために用います。
また、CERT C++, MISRA C++等のコーディング標準のコード断片をコンパイルする際の参考にさせていただこうと考えています。CERT C++, MISRA C++が標準化の動きとの時間的なずれがあれば確認できれば幸いです。また、boostライブラリとの関連、Linux OS, TOPPERSカーネル、g++(GCC), clang++(LLVM）との関係も調査中です。
何か、抜け漏れ、耳より情報がありましたらおしらせくださると幸いです。
<この項は書きかけです。順次追記します。>
背景(back ground)
C/C++でコンパイルエラーが出ると、途方にくれることがしばしばあります。
何回かに１回は、該当するエラーが検索できます。
ただ、条件が違っていて、そこでの修正方法では目的を達成しないこともしばしばです。いろいろな条件のコンパイルエラーとその対応方法について、広く記録することによって、いつか同じエラーに遭遇した時にやくに立つことを目指しています。
この半年の間で、三度、自分のネットでの記録に助けられたことがあります。
また過去に解決できなかった記録を１０種類以上、最近になって解決できたことがあります。それは、主に次の３つの情報に基づいています。
https://stackoverflow.com
https://cpprefjp.github.io
http://ja.cppreference.com/
また
https://researchmap.jp/joub9b3my-1797580/#_1797580
に記載したサイトのお世話になっています。
作業方針(sequence)
Clang++では-std=c++03, C++2bの2種類
g++では-std=c++03, c++2bの２種類
でコンパイルし、
１）コンパイルエラーを収集する。
２）コンパイルエラーをなくす方法を検討する。
コンパイルエラーになる例を示すだけが目的のコードは、コンパイルエラーをなくすのではなく、コンパイルエラーの種類を収集するだけにする。
文法を示すのが目的のコード場合に、コンパイルエラーをなくすのに手間がかかる場合は、順次作業します。
３）リンクエラーをなくす方法を検討する。
文法を示すのが目的のコード場合に、リンクエラーをなくすのに手間がかかる場合は、順次作業します。
４）意味のある出力を作る。
コンパイル、リンクが通っても、意味のある出力を示そうとすると、コンパイル・リンクエラーが出て収拾できそうにない場合がある。順次作業します。
１）だけのものから４）まで進んだものと色々ある状態です。一歩でも前に進むご助言をお待ちしています。「検討事項」の欄に現状を記録するようにしています。
C++N4910:2022 Standard Working Draft on ISO/IEC 14882(0) sample code compile list
C++N4741, 2018 Standard Working Draft on ISO/IEC 14882 sample code compile list
C++N4606, 2016符号断片編纂一覧(example code compile list)
C++N4606, 2016 Working Draft 2016, ISO/IEC 14882, C++ standard(1) Example code compile list
https://qiita.com/kaizen_nagoya/items/df5d62c35bd6ed1c3d43/
C++N3242, 2011 sample code compile list on clang++ and g++
編纂器(Compiler)
clang++ --version
Debian clang version 14.0.5-++20220610033153+c12386ae247c-1~exp1~20220610153237.151
Target: x86_64-pc-linux-gnu, Thread model: posix, InstalledDir: /usr/bin
g++- --version
g++ (GCC) 12.1.0 Copyright (C) 2022 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.
22.4.3 Class template tuple [tuple.tuple] C++N4910:2022 (534) p676.cpp
算譜(source code)
p676.cpp
// C++N4910 Committee Draft, Standard for Programming Language C++
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/n4910.pdf
const char * n4910 = "22.4.3 Class template tuple [tuple.tuple] C++N4910:2022 (534) p676.cpp";
// Debian clang version 14.0.5-++20220610033153+c12386ae247c-
// g++ (GCC) 12.1.0 Copyright (C) 2022 Free Software Foundation, Inc.
// Edited by Dr. OGAWA Kiyoshi. Compile procedure and results record.
// C++N4910:2022 Standard Working Draft on ISO/IEC 14882(0) sample code compile list
// https://qiita.com/kaizen_nagoya/items/fc957ddddd402004bb91
#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cassert>
#include <coroutine>
#include <vector>
#include <complex>
#include <map>
#include <atomic>
#include <unordered_map>
#include <memory>
#include <typeinfo>
using namespace std;
// Example 1
namespace std {
template<class... Types>
class tuple {
public:
// 22.4.3.1, tuple construction
constexpr explicit(see below) tuple();
constexpr explicit(see below ) tuple(const Types&...); template<class... UTypes>
constexpr explicit(see below ) tuple(UTypes&&...); tuple(const tuple&) = default;
tuple(tuple&&) = default;
template<class... UTypes>
constexpr explicit(see below) tuple(tuple<UTypes...>&);
[tuple.tuple]
// only if sizeof...(Types) >= 1
// only if sizeof...(Types) >= 1
template<class... UTypes>
constexpr explicit(see below) tuple(const tuple<UTypes...>&);
template<class... UTypes>
constexpr explicit(see below) tuple(tuple<UTypes...>&&);
template<class... UTypes>
constexpr explicit(see below) tuple(const tuple<UTypes...>&&);
template<class U1, class U2>
constexpr explicit(see below ) tuple(pair<U1, U2>&);
template<class U1, class U2>
constexpr explicit(see below ) tuple(const pair<U1, U2>&);
template<class U1, class U2>
constexpr explicit(see below ) tuple(pair<U1, U2>&&);
template<class U1, class U2>
constexpr explicit(see below ) tuple(const pair<U1, U2>&&);
// only if sizeof...(Types) == 2
// only if sizeof...(Types) == 2
// only if sizeof...(Types) == 2
// only if sizeof...(Types) == 2
// allocator-extended constructors
template<class Alloc>
constexpr explicit(see below)
tuple(allocator_arg_t, const Alloc& a);
template<class Alloc>
constexpr explicit(see below)
tuple(allocator_arg_t, const Alloc& a, const Types&...);
template<class Alloc, class... UTypes> constexpr explicit(see below)
tuple(allocator_arg_t, const Alloc& a, UTypes&&...);
template<class Alloc>
constexpr tuple(allocator_arg_t, const Alloc& a, const tuple&);
template<class Alloc>
constexpr tuple(allocator_arg_t, const Alloc& a, tuple&&);
template<class Alloc, class... UTypes>
constexpr explicit(see below)
tuple(allocator_arg_t, const Alloc& a, tuple<UTypes...>&);
template<class Alloc, class... UTypes> constexpr explicit(see below)
tuple(allocator_arg_t, const Alloc& a, const tuple<UTypes...>&);
template<class Alloc, class... UTypes>
constexpr explicit(see below)
tuple(allocator_arg_t, const Alloc& a, tuple<UTypes...>&&);
template<class Alloc, class... UTypes> constexpr explicit(see below)
tuple(allocator_arg_t, const Alloc& a, const tuple<UTypes...>&&);
template<class Alloc, class U1, class U2>
constexpr explicit(see below)
tuple(allocator_arg_t, const Alloc& a, pair<U1, U2>&);
template<class Alloc, class U1, class U2> constexpr explicit(see below)
tuple(allocator_arg_t, const Alloc& a, const pair<U1, U2>&);
template<class Alloc, class U1, class U2>
constexpr explicit(see below)
tuple(allocator_arg_t, const Alloc& a, pair<U1, U2>&&);
template<class Alloc, class U1, class U2> constexpr explicit(see below)
tuple(allocator_arg_t, const Alloc& a, const pair<U1, U2>&&);
// 22.4.3.2, tuple assignment
constexpr tuple& operator=(const tuple&);
constexpr const tuple& operator=(const tuple&) const; constexpr tuple& operator=(tuple&&) noexcept(see below); constexpr const tuple& operator=(tuple&&) const;
template<class... UTypes>
constexpr tuple& operator=(const tuple<UTypes...>&);
template<class... UTypes>
constexpr const tuple& operator=(const tuple<UTypes...>&) const;
template<class... UTypes>
constexpr tuple& operator=(tuple<UTypes...>&&);
template<class... UTypes>
constexpr const tuple& operator=(tuple<UTypes...>&&) const;
template<class U1, class U2>
constexpr tuple& operator=(const pair<U1, U2>&); // only
template<class U1, class U2>
constexpr const tuple& operator=(const pair<U1, U2>&) const;
template<class U1, class U2>
constexpr tuple& operator=(pair<U1, U2>&&);
template<class U1, class U2>
constexpr const tuple& operator=(pair<U1, U2>&&) const;
// only // only // only
if sizeof...(Types) == 2 if sizeof...(Types) == 2
if sizeof...(Types) == 2 if sizeof...(Types) == 2
// 22.4.3.3, tuple swap
constexpr void swap(tuple&) noexcept(see below);
constexpr void swap(const tuple&) const noexcept(see below);
};
template<class... UTypes>
tuple(UTypes...) -> tuple<UTypes...>;
template<class T1, class T2>
tuple(pair<T1, T2>) -> tuple<T1, T2>;
template<class Alloc, class... UTypes>
tuple(allocator_arg_t, Alloc, UTypes...) -> tuple<UTypes...>;
template<class Alloc, class T1, class T2>
tuple(allocator_arg_t, Alloc, pair<T1, T2>) -> tuple<T1, T2>;
template<class Alloc, class... UTypes>
tuple(allocator_arg_t, Alloc, tuple<UTypes...>) -> tuple<UTypes...>;
}
int main(){
cout << n4910 << endl;
return EXIT_SUCCESS;
}
編纂・実行結果(compile and go)
bash
$ clang++ p676.cpp -std=03 -o p676l -I. -Wall
In file included from p676.cpp:19:
In file included from /usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/atomic:38:
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/c++0x_warning.h:32:2: error: This file requires compiler and library support for the ISO C++ 2011 standard. This support must be enabled with the -std=c++11 or -std=gnu++11 compiler options.
#error This file requires compiler and library support \
^
p676.cpp:28:19: warning: variadic templates are a C++11 extension [-Wc++11-extensions]
template<class... Types>
^
p676.cpp:32:1: error: unknown type name 'constexpr'
constexpr explicit(see below) tuple();
^
p676.cpp:32:19: warning: explicit(bool) is a C++20 extension [-Wc++20-extensions]
constexpr explicit(see below) tuple();
^
p676.cpp:32:20: error: use of undeclared identifier 'see'
constexpr explicit(see below) tuple();
^
p676.cpp:32:31: error: constructor cannot have a return type
constexpr explicit(see below) tuple();
^~~~~
p676.cpp:33:1: error: unknown type name 'constexpr'
constexpr explicit(see below ) tuple(const Types&...); template<class... UTypes>
^
p676.cpp:33:19: warning: explicit(bool) is a C++20 extension [-Wc++20-extensions]
constexpr explicit(see below ) tuple(const Types&...); template<class... UTypes>
^
p676.cpp:33:20: error: use of undeclared identifier 'see'
constexpr explicit(see below ) tuple(const Types&...); template<class... UTypes>
^
p676.cpp:33:32: error: constructor cannot have a return type
constexpr explicit(see below ) tuple(const Types&...); template<class... UTypes>
^~~~~
p676.cpp:33:70: warning: variadic templates are a C++11 extension [-Wc++11-extensions]
constexpr explicit(see below ) tuple(const Types&...); template<class... UTypes>
^
p676.cpp:34:1: error: unknown type name 'constexpr'
constexpr explicit(see below ) tuple(UTypes&&...); tuple(const tuple&) = default;
^
p676.cpp:34:19: warning: explicit(bool) is a C++20 extension [-Wc++20-extensions]
constexpr explicit(see below ) tuple(UTypes&&...); tuple(const tuple&) = default;
^
p676.cpp:34:20: error: use of undeclared identifier 'see'
constexpr explicit(see below ) tuple(UTypes&&...); tuple(const tuple&) = default;
^
p676.cpp:34:44: warning: rvalue references are a C++11 extension [-Wc++11-extensions]
constexpr explicit(see below ) tuple(UTypes&&...); tuple(const tuple&) = default;
^
p676.cpp:34:32: error: constructor cannot have a return type
constexpr explicit(see below ) tuple(UTypes&&...); tuple(const tuple&) = default;
^~~~~
p676.cpp:34:74: warning: defaulted function definitions are a C++11 extension [-Wc++11-extensions]
constexpr explicit(see below ) tuple(UTypes&&...); tuple(const tuple&) = default;
^
p676.cpp:35:18: warning: rvalue references are a C++11 extension [-Wc++11-extensions]
tuple(tuple&&) = default;
^
p676.cpp:35:24: warning: defaulted function definitions are a C++11 extension [-Wc++11-extensions]
tuple(tuple&&) = default;
^
p676.cpp:36:15: warning: variadic templates are a C++11 extension [-Wc++11-extensions]
template<class... UTypes>
^
p676.cpp:37:1: error: unknown type name 'constexpr'
constexpr explicit(see below) tuple(tuple<UTypes...>&);
^
p676.cpp:37:19: warning: explicit(bool) is a C++20 extension [-Wc++20-extensions]
constexpr explicit(see below) tuple(tuple<UTypes...>&);
^
p676.cpp:37:20: error: use of undeclared identifier 'see'
constexpr explicit(see below) tuple(tuple<UTypes...>&);
^
p676.cpp:37:31: error: constructor cannot have a return type
constexpr explicit(see below) tuple(tuple<UTypes...>&);
^~~~~
p676.cpp:38:2: error: 'tuple' does not refer to a value
[tuple.tuple]
^
p676.cpp:29:11: note: declared here
class tuple {
^
p676.cpp:41:1: error: expected member name or ';' after declaration specifiers
template<class... UTypes>
^
p676.cpp:43:15: warning: variadic templates are a C++11 extension [-Wc++11-extensions]
template<class... UTypes>
^
p676.cpp:44:1: error: unknown type name 'constexpr'
constexpr explicit(see below) tuple(tuple<UTypes...>&&);
^
p676.cpp:44:19: warning: explicit(bool) is a C++20 extension [-Wc++20-extensions]
constexpr explicit(see below) tuple(tuple<UTypes...>&&);
^
p676.cpp:44:20: error: use of undeclared identifier 'see'
constexpr explicit(see below) tuple(tuple<UTypes...>&&);
^
p676.cpp:44:53: warning: rvalue references are a C++11 extension [-Wc++11-extensions]
constexpr explicit(see below) tuple(tuple<UTypes...>&&);
^
p676.cpp:44:31: error: constructor cannot have a return type
constexpr explicit(see below) tuple(tuple<UTypes...>&&);
^~~~~
p676.cpp:45:15: warning: variadic templates are a C++11 extension [-Wc++11-extensions]
template<class... UTypes>
^
p676.cpp:46:1: error: unknown type name 'constexpr'
constexpr explicit(see below) tuple(const tuple<UTypes...>&&);
^
p676.cpp:46:19: warning: explicit(bool) is a C++20 extension [-Wc++20-extensions]
constexpr explicit(see below) tuple(const tuple<UTypes...>&&);
^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
16 warnings and 20 errors generated.
$ clang++ p676.cpp -std=2b -o p676l -I. -Wall
p676.cpp:29:11: error: redefinition of 'tuple'
class tuple {
^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/tuple:516:11: note: previous definition is here
class tuple : public _Tuple_impl<0, _Elements...>
^
p676.cpp:119:5: error: redeclaration of deduction guide
tuple(UTypes...) -> tuple<UTypes...>;
^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/tuple:855:5: note: previous declaration is here
tuple(_UTypes...) -> tuple<_UTypes...>;
^
p676.cpp:121:5: error: redeclaration of deduction guide
tuple(pair<T1, T2>) -> tuple<T1, T2>;
^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/tuple:857:5: note: previous declaration is here
tuple(pair<_T1, _T2>) -> tuple<_T1, _T2>;
^
p676.cpp:123:5: error: redeclaration of deduction guide
tuple(allocator_arg_t, Alloc, UTypes...) -> tuple<UTypes...>;
^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/tuple:859:5: note: previous declaration is here
tuple(allocator_arg_t, _Alloc, _UTypes...) -> tuple<_UTypes...>;
^
p676.cpp:125:5: error: redeclaration of deduction guide
tuple(allocator_arg_t, Alloc, pair<T1, T2>) -> tuple<T1, T2>;
^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/tuple:861:5: note: previous declaration is here
tuple(allocator_arg_t, _Alloc, pair<_T1, _T2>) -> tuple<_T1, _T2>;
^
p676.cpp:127:5: error: redeclaration of deduction guide
tuple(allocator_arg_t, Alloc, tuple<UTypes...>) -> tuple<UTypes...>;
^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/tuple:863:5: note: previous declaration is here
tuple(allocator_arg_t, _Alloc, tuple<_UTypes...>) -> tuple<_UTypes...>;
^
6 errors generated.
$ g++ p676.cpp -std=03 -o p676g -I. -Wall
In file included from /usr/local/include/c++/12.1.0/atomic:38,
from p676.cpp:19:
/usr/local/include/c++/12.1.0/bits/c++0x_warning.h:32:2: error: #error This file requires compiler and library support for the ISO C++ 2011 standard. This support must be enabled with the -std=c++11 or -std=gnu++11 compiler options.
32 | #error This file requires compiler and library support \
| ^~~~~
p676.cpp:32:1: warning: identifier 'constexpr' is a keyword in C++11 [-Wc++11-compat]
32 | constexpr explicit(see below) tuple();
| ^~~~~~~~~
p676.cpp:94:91: warning: identifier 'noexcept' is a keyword in C++11 [-Wc++11-compat]
94 | xpr const tuple& operator=(const tuple&) const; constexpr tuple& operator=(tuple&&) noexcept(see below); constexpr const tuple& operator=(tuple&&) const;
| ^~~~~~~~
p676.cpp:28:19: warning: variadic templates only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
28 | template<class... Types>
| ^~~
p676.cpp:32:1: error: 'constexpr' does not name a type
32 | constexpr explicit(see below) tuple();
| ^~~~~~~~~
p676.cpp:32:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:33:1: error: 'constexpr' does not name a type
33 | constexpr explicit(see below ) tuple(const Types&...); template<class... UTypes>
| ^~~~~~~~~
p676.cpp:33:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:33:70: warning: variadic templates only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
33 | constexpr explicit(see below ) tuple(const Types&...); template<class... UTypes>
| ^~~
p676.cpp:34:1: error: 'constexpr' does not name a type
34 | constexpr explicit(see below ) tuple(UTypes&&...); tuple(const tuple&) = default;
| ^~~~~~~~~
p676.cpp:34:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:34:74: warning: defaulted and deleted functions only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
34 | constexpr explicit(see below ) tuple(UTypes&&...); tuple(const tuple&) = default;
| ^~~~~~~
p676.cpp:35:18: error: expected ',' or '...' before '&&' token
35 | tuple(tuple&&) = default;
| ^~
p676.cpp:35:24: warning: defaulted and deleted functions only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
35 | tuple(tuple&&) = default;
| ^~~~~~~
p676.cpp:35:7: error: invalid constructor; you probably meant 'std::tuple<Types> (const std::tuple<Types>&)'
35 | tuple(tuple&&) = default;
| ^~~~~
p676.cpp:36:15: warning: variadic templates only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
36 | template<class... UTypes>
| ^~~
p676.cpp:37:1: error: 'constexpr' does not name a type
37 | constexpr explicit(see below) tuple(tuple<UTypes...>&);
| ^~~~~~~~~
p676.cpp:37:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:38:1: error: expected unqualified-id before '[' token
38 | [tuple.tuple]
| ^
p676.cpp:43:15: warning: variadic templates only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
43 | template<class... UTypes>
| ^~~
p676.cpp:44:1: error: 'constexpr' does not name a type
44 | constexpr explicit(see below) tuple(tuple<UTypes...>&&);
| ^~~~~~~~~
p676.cpp:44:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:45:15: warning: variadic templates only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
45 | template<class... UTypes>
| ^~~
p676.cpp:46:1: error: 'constexpr' does not name a type
46 | constexpr explicit(see below) tuple(const tuple<UTypes...>&&);
| ^~~~~~~~~
p676.cpp:46:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:48:1: error: 'constexpr' does not name a type
48 | constexpr explicit(see below ) tuple(pair<U1, U2>&);
| ^~~~~~~~~
p676.cpp:48:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:50:1: error: 'constexpr' does not name a type
50 | constexpr explicit(see below ) tuple(const pair<U1, U2>&);
| ^~~~~~~~~
p676.cpp:50:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:52:1: error: 'constexpr' does not name a type
52 | constexpr explicit(see below ) tuple(pair<U1, U2>&&);
| ^~~~~~~~~
p676.cpp:52:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:54:1: error: 'constexpr' does not name a type
54 | constexpr explicit(see below ) tuple(const pair<U1, U2>&&);
| ^~~~~~~~~
p676.cpp:54:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:61:1: error: 'constexpr' does not name a type
61 | constexpr explicit(see below)
| ^~~~~~~~~
p676.cpp:61:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:64:1: error: 'constexpr' does not name a type
64 | constexpr explicit(see below)
| ^~~~~~~~~
p676.cpp:64:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:66:28: warning: variadic templates only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
66 | template<class Alloc, class... UTypes> constexpr explicit(see below)
| ^~~
p676.cpp:66:40: error: 'constexpr' does not name a type
66 | template<class Alloc, class... UTypes> constexpr explicit(see below)
| ^~~~~~~~~
p676.cpp:66:40: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:69:3: error: 'constexpr' does not name a type
69 | constexpr tuple(allocator_arg_t, const Alloc& a, const tuple&);
| ^~~~~~~~~
p676.cpp:69:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:71:3: error: 'constexpr' does not name a type
71 | constexpr tuple(allocator_arg_t, const Alloc& a, tuple&&);
| ^~~~~~~~~
p676.cpp:71:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:72:28: warning: variadic templates only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
72 | template<class Alloc, class... UTypes>
| ^~~
p676.cpp:73:1: error: 'constexpr' does not name a type
73 | constexpr explicit(see below)
| ^~~~~~~~~
p676.cpp:73:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:75:28: warning: variadic templates only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
75 | template<class Alloc, class... UTypes> constexpr explicit(see below)
| ^~~
p676.cpp:75:40: error: 'constexpr' does not name a type
75 | template<class Alloc, class... UTypes> constexpr explicit(see below)
| ^~~~~~~~~
p676.cpp:75:40: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:77:28: warning: variadic templates only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
77 | template<class Alloc, class... UTypes>
| ^~~
p676.cpp:78:1: error: 'constexpr' does not name a type
78 | constexpr explicit(see below)
| ^~~~~~~~~
p676.cpp:78:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:80:28: warning: variadic templates only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
80 | template<class Alloc, class... UTypes> constexpr explicit(see below)
| ^~~
p676.cpp:80:40: error: 'constexpr' does not name a type
80 | template<class Alloc, class... UTypes> constexpr explicit(see below)
| ^~~~~~~~~
p676.cpp:80:40: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:83:1: error: 'constexpr' does not name a type
83 | constexpr explicit(see below)
| ^~~~~~~~~
p676.cpp:83:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:85:43: error: 'constexpr' does not name a type
85 | template<class Alloc, class U1, class U2> constexpr explicit(see below)
| ^~~~~~~~~
p676.cpp:85:43: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:88:1: error: 'constexpr' does not name a type
88 | constexpr explicit(see below)
| ^~~~~~~~~
p676.cpp:88:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:90:43: error: 'constexpr' does not name a type
90 | template<class Alloc, class U1, class U2> constexpr explicit(see below)
| ^~~~~~~~~
p676.cpp:90:43: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:93:1: error: 'constexpr' does not name a type
93 | constexpr tuple& operator=(const tuple&);
| ^~~~~~~~~
p676.cpp:93:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:94:1: error: 'constexpr' does not name a type
94 | constexpr const tuple& operator=(const tuple&) const; constexpr tuple& operator=(tuple&&) noexcept(see below); constexpr const tuple& operator=(tuple&&) const;
| ^~~~~~~~~
p676.cpp:94:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:94:55: error: 'constexpr' does not name a type
94 | constexpr const tuple& operator=(const tuple&) const; constexpr tuple& operator=(tuple&&) noexcept(see below); constexpr const tuple& operator=(tuple&&) const;
| ^~~~~~~~~
p676.cpp:94:55: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:94:112: error: 'constexpr' does not name a type
94 | ator=(const tuple&) const; constexpr tuple& operator=(tuple&&) noexcept(see below); constexpr const tuple& operator=(tuple&&) const;
| ^~~~~~~~~
p676.cpp:94:112: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:95:15: warning: variadic templates only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
95 | template<class... UTypes>
| ^~~
p676.cpp:96:3: error: 'constexpr' does not name a type
96 | constexpr tuple& operator=(const tuple<UTypes...>&);
| ^~~~~~~~~
p676.cpp:96:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:97:15: warning: variadic templates only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
97 | template<class... UTypes>
| ^~~
p676.cpp:98:3: error: 'constexpr' does not name a type
98 | constexpr const tuple& operator=(const tuple<UTypes...>&) const;
| ^~~~~~~~~
p676.cpp:98:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:99:15: warning: variadic templates only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
99 | template<class... UTypes>
| ^~~
p676.cpp:100:3: error: 'constexpr' does not name a type
100 | constexpr tuple& operator=(tuple<UTypes...>&&);
| ^~~~~~~~~
p676.cpp:100:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:101:15: warning: variadic templates only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
101 | template<class... UTypes>
| ^~~
p676.cpp:102:3: error: 'constexpr' does not name a type
102 | constexpr const tuple& operator=(tuple<UTypes...>&&) const;
| ^~~~~~~~~
p676.cpp:102:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:104:1: error: 'constexpr' does not name a type
104 | constexpr tuple& operator=(const pair<U1, U2>&); // only
| ^~~~~~~~~
p676.cpp:104:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:106:3: error: 'constexpr' does not name a type
106 | constexpr const tuple& operator=(const pair<U1, U2>&) const;
| ^~~~~~~~~
p676.cpp:106:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:108:3: error: 'constexpr' does not name a type
108 | constexpr tuple& operator=(pair<U1, U2>&&);
| ^~~~~~~~~
p676.cpp:108:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:110:3: error: 'constexpr' does not name a type
110 | constexpr const tuple& operator=(pair<U1, U2>&&) const;
| ^~~~~~~~~
p676.cpp:110:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:112:1: error: expected unqualified-id before 'if'
112 | if sizeof...(Types) == 2 if sizeof...(Types) == 2
| ^~
p676.cpp:116:1: error: 'constexpr' does not name a type
116 | constexpr void swap(const tuple&) const noexcept(see below);
| ^~~~~~~~~
p676.cpp:116:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p676.cpp:118:17: warning: variadic templates only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
118 | template<class... UTypes>
| ^~~
p676.cpp:119:17: warning: variadic templates only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
119 | tuple(UTypes...) -> tuple<UTypes...>;
| ^~~
p676.cpp:119:41: error: expected constructor, destructor, or type conversion before ';' token
119 | tuple(UTypes...) -> tuple<UTypes...>;
| ^
p676.cpp:121:41: error: expected constructor, destructor, or type conversion before ';' token
121 | tuple(pair<T1, T2>) -> tuple<T1, T2>;
| ^
p676.cpp:122:30: warning: variadic templates only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
122 | template<class Alloc, class... UTypes>
| ^~~
p676.cpp:123:10: error: expected constructor, destructor, or type conversion before '(' token
123 | tuple(allocator_arg_t, Alloc, UTypes...) -> tuple<UTypes...>;
| ^
p676.cpp:125:10: error: expected constructor, destructor, or type conversion before '(' token
125 | tuple(allocator_arg_t, Alloc, pair<T1, T2>) -> tuple<T1, T2>;
| ^
p676.cpp:126:30: warning: variadic templates only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
126 | template<class Alloc, class... UTypes>
| ^~~
p676.cpp:127:10: error: expected constructor, destructor, or type conversion before '(' token
127 | tuple(allocator_arg_t, Alloc, tuple<UTypes...>) -> tuple<UTypes...>;
| ^
$ g++ p676.cpp -std=2b -o p676g -I. -Wall
p676.cpp:29:11: error: redefinition of 'class std::tuple< <template-parameter-1-1> >'
29 | class tuple {
| ^~~~~
In file included from /usr/local/include/c++/12.1.0/bits/stl_map.h:63,
from /usr/local/include/c++/12.1.0/map:61,
from p676.cpp:18:
/usr/local/include/c++/12.1.0/tuple:609:11: note: previous definition of 'class std::tuple< <template-parameter-1-1> >'
609 | class tuple : public _Tuple_impl<0, _Elements...>
| ^~~~~
p676.cpp:119:5: error: deduction guide 'template<class ... UTypes> std::tuple(UTypes ...)-> tuple<_Args1 ...>' redeclared
119 | tuple(UTypes...) -> tuple<UTypes...>;
| ^~~~~
/usr/local/include/c++/12.1.0/tuple:948:5: note: 'template<class ... _UTypes> std::tuple(_UTypes ...)-> tuple<_Args1 ...>' previously declared here
948 | tuple(_UTypes...) -> tuple<_UTypes...>;
| ^~~~~
p676.cpp:121:5: error: deduction guide 'template<class T1, class T2> std::tuple(pair<_T1, _T2>)-> tuple<_T1, _T2>' redeclared
121 | tuple(pair<T1, T2>) -> tuple<T1, T2>;
| ^~~~~
/usr/local/include/c++/12.1.0/tuple:950:5: note: 'template<class _T1, class _T2> std::tuple(pair<_T1, _T2>)-> tuple<_T1, _T2>' previously declared here
950 | tuple(pair<_T1, _T2>) -> tuple<_T1, _T2>;
| ^~~~~
p676.cpp:123:5: error: deduction guide 'template<class Alloc, class ... UTypes> std::tuple(allocator_arg_t, Alloc, UTypes ...)-> tuple<_Args2 ...>' redeclared
123 | tuple(allocator_arg_t, Alloc, UTypes...) -> tuple<UTypes...>;
| ^~~~~
/usr/local/include/c++/12.1.0/tuple:952:5: note: 'template<class _Alloc, class ... _UTypes> std::tuple(allocator_arg_t, _Alloc, _UTypes ...)-> tuple<_Args2 ...>' previously declared here
952 | tuple(allocator_arg_t, _Alloc, _UTypes...) -> tuple<_UTypes...>;
| ^~~~~
p676.cpp:125:5: error: deduction guide 'template<class Alloc, class T1, class T2> std::tuple(allocator_arg_t, Alloc, pair<_Tp1, _Tp2>)-> tuple<_T1, _T2>' redeclared
125 | tuple(allocator_arg_t, Alloc, pair<T1, T2>) -> tuple<T1, T2>;
| ^~~~~
/usr/local/include/c++/12.1.0/tuple:954:5: note: 'template<class _Alloc, class _T1, class _T2> std::tuple(allocator_arg_t, _Alloc, pair<_Tp1, _Tp2>)-> tuple<_T1, _T2>' previously declared here
954 | tuple(allocator_arg_t, _Alloc, pair<_T1, _T2>) -> tuple<_T1, _T2>;
| ^~~~~
p676.cpp:127:5: error: deduction guide 'template<class Alloc, class ... UTypes> std::tuple(allocator_arg_t, Alloc, tuple<_Args2 ...>)-> tuple<_Args2 ...>' redeclared
127 | tuple(allocator_arg_t, Alloc, tuple<UTypes...>) -> tuple<UTypes...>;
| ^~~~~
/usr/local/include/c++/12.1.0/tuple:956:5: note: 'template<class _Alloc, class ... _UTypes> std::tuple(allocator_arg_t, _Alloc, tuple<_Args2 ...>)-> tuple<_Args2 ...>' previously declared here
956 | tuple(allocator_arg_t, _Alloc, tuple<_UTypes...>) -> tuple<_UTypes...>;
| ^~~~~
検討事項(agenda)
コンパイルエラーを取るか、コンパイルエラーの理由を解説する。
参考資料(reference)
cpprefjp - C++日本語リファレンス
コンパイラの実装状況
typedef は C++11 ではオワコン
C99からC++14を駆け抜けるC++講座
@kazuo_reve 私が効果を確認した「小川メソッド」
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C++N4910:2022 tag follower 200人超えました。ありがとうございます。
C++N4910:2022 tag follower 200人超えました。ありがとうございます。
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C++ Error Message Collection(1)does not name a type, 11 articles
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小川メソッド 覚え（書きかけ）
＜この記事は個人の過去の経験に基づく個人の感想です。現在所属する組織、業務とは関係がありません。＞
文書履歴(document history)
ver. 0.01 初稿 20220724