[aspectc-user] Automatic #include insertion

[Arnd-Hendrik Mathias]

Hi,
no, sorry, just a typo in the cited code. The original contains the 
correct name.

Panu Bloigu wrote:
> Hello.
>
>> test.hh:
>> class test {};
>
> This should probably be with the capital 'T':
>
> test.hh:
> class Test{};
>
> ---
>
> I quickly tested your code and found out that when ac++ generates the 
> test.acc file, the declaration 'extern char a' is inserted to that 
> file a few lines after the definition of the method Test::test(). This 
> means that the variable 'a' isn't yet visible in the method Test::test().
>
> .acc files are the output of ac++ compiler. They can then be fed to 
> your regular C++ compiler. I've found that it's sometimes very useful 
> to take a look at the generated .acc files to see if the problem is in 
> the code generated by ac++ and not in your own code. If you already 
> didn't know this, the ag++ wrapper for ac++ deletes the .acc files 
> after they have been processed by your C++ compiler, but you can 
> instruct ag++ to leave them lying around with the option --keep_acc 
> (in the SVN version this option seems to have been replaced with 
> --keep_woven, or something similar).
>
> So as a conclusion, I suspect that there's a problem with the code 
> generated by ac++. The AspectC++ compiler devs on this list might want 
> to check this out. Just for reference, there's this code in test.acc, 
> beginning at line 71:
>
> ============================
> class Test{  friend class ::Test1;
>    private:
>  public : static void test ( void )
> {
> std :: cout << "In Test::test ()" << std :: endl ;
> std :: cout << "a = " << a << std :: endl ;
> } ;};
> #endif /*TEST_HH_*/
> #endif // 
> __ac_guard_C__Documents32and32Settings_work_Desktop_temp_Rojekti_test_hh__ 
>
> #ifndef A_HH_
> #define A_HH_
> extern char a;
> #endif /*A_HH_*/
> ============================
>
> I gave the --no_line option for ac++ to see error messages with line 
> numbers of the .acc files instead of line numbers of the original 
> source files.
>
>
>> test.cc:
>> int main ( int argc, char** argv ) { return 0; }
>>
>> a.hh:
>> extern char a;
>>
>> a.cc:
>> #include "a.hh"
>> char a = 'H';
>>
>> test.ah:
>> #include <iostream>
>> #include "test.hh"
>> #include "a.hh"
>>
>> aspect Test1
>> {
>>    advice "Test" : slice class
>>    {
>>       public : static void test ( void )
>>       {
>>          std::cout << "In Test::test ()" << std::endl;
>>          std::cout << "a = " << a << std::endl;
>>       };
>>    };
>>    advice execution ( "% main ( ... )" ) : before ()
>>    {
>>       Test::test ();
>>    };
>> };
>>
>> Here the test.hh include (for the Test class) is inserted 
>> automatically (can be tested by removing the "a = "... line from the 
>> aspect) while the a.hh include is not. In this example this leads to 
>> "error: 'a' was not declared in this scope".
>>
>> Can anyone confirm this or am I doing something wrong here? Is this 
>> behavior by a special purpose?
>> In the given example the consequence was, that I have to add the 
>> #include line to the test.cc permanently, independently of whether I 
>> use this aspect or not.
>> Best regards
>>
>> Arnd-Hendrik
>>
>>
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>> aspectc-user at aspectc.org
>> http://www.aspectc.org/mailman/listinfo/aspectc-user
>
>
>