Nullable / Notnull：语法提议 [英] Nullable/Notnull : syntax proposal
问题描述
您好，
我建议为C创建两个新关键字，''notnull''和
''nullable''。
他们的意思是按合同设计，确保在编译时验证一些规则
。它不应该需要额外的运行时间 -
支票
要实现。
我已经在这个URL上发布了它应该如何工作的描述：
http://sarnold.free.fr/wordpress/？ p = 71
请阅读并告诉我你的想法。
问候，
$ b $bStéphane A.
Hello,
I am proposing to create two new keywords for C, ''notnull'' and
''nullable''.
Their meaning is a sort of ''design by contract'', ensuring some rules
are
verified at compile-time. It should not require additional runtime-
checks
to be implemented.
I have posted my description of how it should work at this URL:
http://sarnold.free.fr/wordpress/?p=71
Please read it and tell me what you think of it.
Regards,
Stéphane A.
推荐答案
sa *** **@free.fr 写道：
>
你好，
我建议为C创建两个新关键字，''notnull''和
''nullable''。
他们的意思是某种''设计按合同''，确保在编译时验证一些规则
。它不应该需要额外的运行时间 -
支票
要实现。
我已经在这个URL上发布了它应该如何工作的描述：
http://sarnold.free.fr/wordpress/？ p = 71
请阅读并告诉我你的想法。
>
Hello,
I am proposing to create two new keywords for C, ''notnull'' and
''nullable''.
Their meaning is a sort of ''design by contract'', ensuring some rules
are
verified at compile-time. It should not require additional runtime-
checks
to be implemented.
I have posted my description of how it should work at this URL:
http://sarnold.free.fr/wordpress/?p=71
Please read it and tell me what you think of it.
我不需要它。
我不想要它。
我不喜欢不喜欢它。
我很惊讶它还没有在C99。
-
pete
I don''t need it.
I don''t want it.
I don''t like it.
I''m surprised it isn''t already in C99.
--
pete
sa*****@free.fr 写道：
sa*****@free.fr writes:
您好，
我建议为C创建两个新关键字，''notnull''和
''nullable''。
他们的意思是按合同设计，确保一些规则
在编译时验证。它不应该需要额外的运行时间 -
支票
要实现。
我已经在这个URL上发布了它应该如何工作的描述：
http://sarnold.free.fr/wordpress/？ p = 71
请阅读并告诉我你的想法。
问候，
St ?? phane A.
Hello,
I am proposing to create two new keywords for C, ''notnull'' and
''nullable''.
Their meaning is a sort of ''design by contract'', ensuring some rules
are
verified at compile-time. It should not require additional runtime-
checks
to be implemented.
I have posted my description of how it should work at this URL:
http://sarnold.free.fr/wordpress/?p=71
Please read it and tell me what you think of it.
Regards,
St??phane A.
简化它。不需要可空的可空。因为它已经存在了。
另外我认为这是一个愚蠢的想法。只需将malloc包装成你想做的事情，而不是将命令转换为notnull变量。更多
效率。否则每次你分配到一个notnull系统将会执行这些检查。
Simplify it. There is no need for "nullable" since it''s already there.
In addition I think it''s a silly idea. Just wrap malloc to do what you want to
do rather than have the assignment to a notnull variable. Much more
efficient. Otherwise every time you assign to a notnull the system will
be performing these checks.
sa ***** @ free.fr 写道：
您好，
我建议为C创建两个新关键字，''notnull''和
''nullable''。
他们的意思是一种按合同设计，确保在编译时验证一些规则
。它不应该需要额外的运行时间 -
支票
要实现。
我已经在这个URL上发布了它应该如何工作的描述：
http://sarnold.free.fr/wordpress/？ p = 71
请阅读并告诉我你的想法。
问候，
$ b $bStéphane A.
Hello,
I am proposing to create two new keywords for C, ''notnull'' and
''nullable''.
Their meaning is a sort of ''design by contract'', ensuring some rules
are
verified at compile-time. It should not require additional runtime-
checks
to be implemented.
I have posted my description of how it should work at this URL:
http://sarnold.free.fr/wordpress/?p=71
Please read it and tell me what you think of it.
Regards,
Stéphane A.
你可以通过
int函数来断言标准C中的参数不为空（int MyTable [静态1] ]）;
这意味着参数MyTable至少有一个
元素，即它不能为NULL。
是的，它不是一个很好的语法，但它是标准的。
jacob
You can assert a parameter not being null in standard C by
int function(int MyTable[static 1]);
This means that the parameter MyTable has at least one
element, i.e. it can''t be NULL.
True, it is NOT a GREAT syntax but it is standard.
jacob
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