C++ Forum

I have a question. When i use smart pointer and ends with an exception it's necessary in order to free the smart pointer with the RELEASE command.
My application consumes to much memory.
Thanks

Where does alignment come into play?
And why allocate the extra 100 bytes?

Pleas email me if you reply...solrak29@yahoo.com

Some simple stuff but just wanted to check...

strBuff is a char pointer to a chunch of memory. So if you add to this pointer (base) you will point to the next character or byte.

When this pointer is cast to a CTest pointer, adding to it will move sizeof( CTest ) ahead.

I like the use of asserts in the testing code.
Also I like the fact of creating a testing directory and organizing your code, but litering
you code with ifdefs for testing can get harry. But I do understand that certain parts of the code can and/or should not executed when testing, but your missing the actual value of unit testing...right? I would rather take the extreme programming approach and design your code for testing. Thus, make sure your class, functions, or whatever are testable within the framework and you dont have to put ifdef in the production code.

It seesm straight forward, but the anonymous namespace only allows functions in the same file access...????

Not mentioned is that std::ios_base::failbit is also set upon encountering an end-of-file condition. This will trigger an exception if exceptions are enabled for failbit. In that case, you need to check for eof in the catch block (probably using ios::eof() ).

Hi,

your article about setting the stream state correctly when encountering invalid data was very interesting. I know now, how to handle an invalid state from the perspective of the operator implementation, but when i'm using the input operator, how can i display an error message, which points the user in the right direction? How should the caller of the operator deal with this situation?

I only played a little bit with input operators and it seemed more natural to me, to throw an exception with a detailed description of what was going on. My implementation of your example would be more like this:

template< class char_type, class char_traits>
std::basic_istream< char_type, char_traits> & operator >> (
std::basic_istream< char_type, char_traits> & streamIn, complex & value)
{
int nReal, nImag;

char_type ch;
streamIn >> ch;
if ( ch != '(')
throw ComplexBadFormatException("Missing opening bracket.");

streamIn >> nReal;
streamIn >> ch;
if ( ch != ',')
throw ComplexBadFormatException("Missing colon.");

streamIn >> nImag;
streamIn >> ch;
if ( ch != ')')
throw ComplexBadFormatException("Missing closing bracket.");

value.m_nReal = nReal;
value.m_nImag = nImag;

return streamIn;
}

greetings, Volker.

I found your atrictl very informative and good reminder in returning temporaries and example of temporary variable and the gotchas inbetween. I have to points though:

1. under djgpp there is no basic_stringstream...any ideas? I thought djgpp isthe same as gcc which uses the Silocone G STL...????

2. I would like to see a main for the "correct implementation"...??

3. Whats the difference between a stream and a stringstream??