Just have seen something strange in standard:

3.4.4/3 - 3rd example:

struct Base {
   struct Data; //OK: decalres nested Data
//...
   struct Data { /*...*/ }; //Defines nested Data
   struct Data; //SURPRISE: OK: Redeclares nested Data
};

I have reread "Class members" section and found that

9.2/1 - "... A member shall not be declared twice [...], except that a
nested class [...] can be declared and then later defined."

Did I miss something?


Sincerely,

Ruslan Abdikeev
Brainbench MVP for Visual C++
http://www.brainbench.com



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In article <9a0mqq$pqn$1@news.wplus.spb.ru>, Ruslan Abdikeev says...
>
>Just have seen something strange in standard:
>
>3.4.4/3 - 3rd example:
>
>struct Base {
>   struct Data; //OK: decalres nested Data
>//...
>   struct Data { /*...*/ }; //Defines nested Data
>   struct Data; //SURPRISE: OK: Redeclares nested Data
>};

You're not the first to note that. DR 85 is about the
last line. Proposed resolution is to remove it.

HTH,

--
Michiel Salters
Consultant Technical Software Engineering
CMG Trade, Transport & Industry
Michiel.Salters@cmg.nl

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>===== Original Message From "Ruslan Abdikeev"
<ruslan_abdikeevRemoveIt@hotmail.com> =====
>Just have seen something strange in standard:
>
>3.4.4/3 - 3rd example:
>
>struct Base {
>   struct Data; //OK: decalres nested Data
>//...
>   struct Data { /*...*/ }; //Defines nested Data
>   struct Data; //SURPRISE: OK: Redeclares nested Data
>};
>
>I have reread "Class members" section and found that
>
>9.2/1 - "... A member shall not be declared twice [...], except that a
>nested class [...] can be declared and then later defined."
>
>Did I miss something?

No, 3.4.4p3 is in error and will be corrected in the upcoming Technical
Corrigendum.  See
http://www.dkuug.dk/jtc1/sc22/wg21/docs/cwg_defects.html#85.

-- William M. Miller

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