blocks|key|151045|text|N3936+(C%2B%2B14)中的表4(关键字)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|151046|alignas+++++++++++continue++++++++++friend++++++++++++register++++++++++true
alignof+++++++++++decltype++++++++++goto++++++++++++++reinterpret_cast++try
asm+++++++++++++++default+++++++++++if++++++++++++++++return++++++++++++typedef
auto++++++++++++++delete++++++++++++inline++++++++++++short+++++++++++++typeid
bool++++++++++++++do++++++++++++++++int+++++++++++++++signed++++++++++++typename
break+++++++++++++double++++++++++++long++++++++++++++sizeof++++++++++++union
case++++++++++++++dynamic_cast++++++mutable+++++++++++static++++++++++++unsigned
catch+++++++++++++else++++++++++++++namespace+++++++++static_assert+++++using
char++++++++++++++enum++++++++++++++new+++++++++++++++static_cast+++++++virtual
char16_t++++++++++explicit++++++++++noexcept++++++++++struct++++++++++++void
char32_t++++++++++export++++++++++++nullptr+++++++++++switch++++++++++++volatile
class+++++++++++++extern++++++++++++operator++++++++++template++++++++++wchar_t
const+++++++++++++false+++++++++++++private+++++++++++this++++++++++++++while
constexpr+++++++++float+++++++++++++protected+++++++++thread_local
const_cast++++++++for+++++++++++++++public++++++++++++throw|code-block|syntax|javascript|151047|N3337+(C%2B%2B11)中的表4：|151048|alignas+++++++++++continue++++++++++friend++++++++++++register++++++++++true
alignof+++++++++++decltype++++++++++goto++++++++++++++reinterpret_cast++try
asm+++++++++++++++default+++++++++++if++++++++++++++++return++++++++++++typedef
auto++++++++++++++delete++++++++++++inline++++++++++++short+++++++++++++typeid
bool++++++++++++++do++++++++++++++++int+++++++++++++++signed++++++++++++typename
break+++++++++++++double++++++++++++long++++++++++++++sizeof++++++++++++union
case++++++++++++++dynamic_cast++++++mutable+++++++++++static++++++++++++unsigned
catch+++++++++++++else++++++++++++++namespace+++++++++static_assert+++++using
char++++++++++++++enum++++++++++++++new+++++++++++++++static_cast+++++++virtual
char16_t++++++++++explicit++++++++++noexcept++++++++++struct++++++++++++void
char32_t++++++++++export++++++++++++nullptr+++++++++++switch++++++++++++volatile
class+++++++++++++extern++++++++++++operator++++++++++template++++++++++wchar_t
const+++++++++++++false+++++++++++++private+++++++++++this++++++++++++++while
constexpr+++++++++float+++++++++++++protected+++++++++thread_local
const_cast++++++++for+++++++++++++++public++++++++++++throw|151049|...which是一种冗长的说“不”的方式。|151050|(override和final是“具有特殊含义的标识符”，在表3中列出；and等是"alternative+representations...for某些运算符和标点符号“，在表5中列出。这两个表都没有在C%2B%2B11和C%2B%2B14之间更改。)|offset|length|style|CODE|151051|entityMap^0|0|0|0|0|0|1|8|A|5|10|3|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|Y|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|Z|8|@$O|10|P|11|Q|R]|$O|12|P|13|Q|R]|$O|14|P|15|Q|R]]|9|@]|A|$]]|$1|S|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|T|$]]

Table 4 (Keywords) in N3936 (C++14):

<pre class="lang-none prettyprint-override"><code>alignas continue friend register true
alignof decltype goto reinterpret_cast try
asm default if return typedef
auto delete inline short typeid
bool do int signed typename
break double long sizeof union
case dynamic_cast mutable static unsigned
catch else namespace static_assert using
char enum new static_cast virtual
char16_t explicit noexcept struct void
char32_t export nullptr switch volatile
class extern operator template wchar_t
const false private this while
constexpr float protected thread_local
const_cast for public throw
</code></pre>

Table 4 in N3337 (C++11):

<pre class="lang-none prettyprint-override"><code>alignas continue friend register true
alignof decltype goto reinterpret_cast try
asm default if return typedef
auto delete inline short typeid
bool do int signed typename
break double long sizeof union
case dynamic_cast mutable static unsigned
catch else namespace static_assert using
char enum new static_cast virtual
char16_t explicit noexcept struct void
char32_t export nullptr switch volatile
class extern operator template wchar_t
const false private this while
constexpr float protected thread_local
const_cast for public throw
</code></pre>

...which is a long-winded way of saying "no".

(<code>override</code> and <code>final</code> are "identifiers with special meaning" and are listed in Table 3; <code>and</code> etc. are "alternative representations...for certain operators and punctuators" and are listed in Table 5. Neither table changed between C++11 and C++14.)

blocks|key|2944101|text|我张贴这个答案是为了给出工具来寻找类似问题的答案。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2944102|标准草案目前保存在公共GitHub存储库中。这意味着你可以问GitHub本身这个问题！|2944103|关键字表位于文件source/lex.tex上。如果你将其归咎于此，我们可以发现last+change+to+the+keywords+table发生在2011年8月(这实际上是第一次提交:自从回购在C%2B%2B11最终完成时上线以来，该表一直没有改变)。|offset|length|style|CODE|2944104|或者，我们可以要求GitHub比较标准的两个版本:+N3337和N3936的投票结果。一个diff+between+those+two表明对lex.tex的更改并没有改变keywords表中的任何内容。|2944105|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/cplusplus/draft/blame/master/source/lex.tex#L637|1|https://github.com/cplusplus/draft/compare/n3337...n3936#diff-a803830b6534424eb14ecf959b859c07R1^0|0|0|8|E|14|X|0|0|1Y|7|19|M|1|0^^$0|@$1|2|3|4|5|6|7|V|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|W|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|X|8|@$F|Y|G|Z|H|I]]|9|@$F|10|G|11|1|12]]|A|$]]|$1|J|3|K|5|6|7|13|8|@$F|14|G|15|H|I]]|9|@$F|16|G|17|1|18]]|A|$]]|$1|L|3|-4|5|6|7|19|8|@]|9|@]|A|$]]]|M|$N|$5|O|P|Q|A|$R|S]]|T|$5|O|P|Q|A|$R|U]]]]

I'm posting this answer for the sake of giving tools for finding answers to similar questions.

The standard draft is currently kept in a public GitHub repository. That means you can ask this question to GitHub itself!

The keywords table is on the file <code>source/lex.tex</code>. If you do a blame on it, we can find that the <a href="https://github.com/cplusplus/draft/blame/master/source/lex.tex#L637" rel="noreferrer">last change to the keywords table</a> took place back in August 2011 (it's actually the first commit: that table hasn't changed since the repo went live around the time C++11 was being finalised).

Alternatively we can ask GitHub to compare the two drafts that were sent for ballot for both versions of the standard: N3337 and N3936. A <a href="https://github.com/cplusplus/draft/compare/n3337...n3936#diff-a803830b6534424eb14ecf959b859c07R1" rel="noreferrer">diff between those two</a> shows that the changes to <code>lex.tex</code> did not change anything in the keywords table.

blocks|key|2944132|text|C%2B%2B14不会添加新的关键字。这并不奇怪，因为C%2B%2B14是对C%2B%2B11的一个小升级，主要涉及清理错误和进行小的、影响小的改进。下一个主要的变化可能是C%2B%2B'17‘，我期待着新的关键字再次出现。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2944133|2944134|+C%2B%2B标准委员会倾向于避免向语言中添加新的关键字，但对于C%2B%2B11，情况并非如此。|blockquote|2944135|2944136|2944137|我认为值得考虑的是，为什么委员会不愿添加新的关键字(巧合的是，为什么您在列表中包含auto是错误的)。新关键字的主要问题是，在C%2B%2B中不能使用关键字作为标识符，这意味着添加新关键字会破坏现有代码。因此，改变auto的用途并不会违反他们的规则，因为无论如何，现有的代码都不能使用auto作为标识符。|offset|length|style|CODE|2944138|因此，为了接受一个新的关键字，需要一个合理的理由来超过与现有代码的潜在冲突的成本，并且没有合理的方法在没有新关键字的情况下实现相同的事情。在C%2B%2B11的案例中，委员会接受了一些需要新关键字的建议，因为他们觉得好处大于成本，而不是因为他们不讨厌添加新关键字。|2944139|这也是为什么，如果你看一下你给出的列表，每一个都是一个复合关键字，因为这减少了它们与现有标识符冲突的机会。|2944140|entityMap^0|0|0|0|0|0|15|4|2V|4|3U|4|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|U|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|V|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|W|8|@]|9|@]|A|$]]|$1|G|3|-4|5|6|7|X|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|Y|8|@$J|Z|K|10|L|M]|$J|11|K|12|L|M]|$J|13|K|14|L|M]]|9|@]|A|$]]|$1|N|3|O|5|6|7|15|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|16|8|@]|9|@]|A|$]]|$1|R|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|S|$]]

No new keywords will be added with C++14. This is unsurprising as C++14 is intended as a small upgrade to C++11 mainly involved in cleaning up bugs and making small, low impact, improvements. The next major change is likely to be C++'17' where I would expect new keywords once more.

<blockquote>
 The C++ Standards Committee tends to shy away from adding new keywords
 to the language, yet with C++11 that was not the case.
</blockquote>

I think it's worth considering why the committee shies away from adding new keywords (and co-incidentally why you are wrong to include <code>auto</code> on your list). The main problem with new keywords is that in C++ you can't use a keyword as an identifier which means that adding a new keyword breaks existing code. Repurposing <code>auto</code>, then, doesn't break their rule because no existing code could use <code>auto</code> as an identifier anyway.

So in order to accept a new keyword there needs to be a justification that outweighs the cost of a potential clash with existing code and no sensible way to implement the same thing without a new keyword. In the case of C++11, the committee accepted a few proposals that required new keywords since they felt that that the benefit outweighed the cost not because they don't hate to add new keywords.

It's also why, if you look down the list you gave, each one is a compound keyword since that reduces the chance that they'll clash with existing identifiers.

The C++ Standards Committee tends to shy away from adding new keywords to the language, yet with C++11 that was not the case. Some examples:

<pre><code>constexpr
decltype
thread_local
auto // New usage
noexcept
nullptr
static_assert
alignof
alignas
</code></pre>

Are there any new keywords introduced with C++14?

Is C++14 adding new keywords to C++?

GitHub

C++标准委员会倾向于避免在语言中添加新的关键字，但对于C++11，情况并非如此。下面是一些例子：constexprdecltypethread_localauto // New usagenoexceptnullptrstatic_assertalignofalignasC++14中是否引入了新的关键字？

问C++14是否向C++添加了新的关键字？
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