What does it mean?Originally Posted by http://www.adahome.com/Resources/Languages/contrast_ada_cpp.html
What does it mean?Originally Posted by http://www.adahome.com/Resources/Languages/contrast_ada_cpp.html
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Siavosh K C
This is a class contract:
Say for example that I wanted to inline foo(), for some reason. I could define the function in the class contract to achieve that; therefore, I've violated a common style guideline that states you should keep implementation of a class and definition of a class separate. I find it a weak argument, but that's me.Code:class X { public: X(int); ~X(); int foo(); int get_int(); void set_int(); private: int x; };
In fact the whole way that page makes its point bothers me.
Last edited by whiteflags; 09-15-2006 at 04:08 AM.
Of course it is Ada site. ;-)In fact the whole way that page makes its point bothers me.
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Siavosh K C
Particularly considering we can still define the function outside the class body. Inlined or not.
Besides...
55. C++ is widely used.
Ada is not.
Originally Posted by brewbuck:
Reimplementing a large system in another language to get a 25% performance boost is nonsense. It would be cheaper to just get a computer which is 25% faster.
<unstated>And Ada must be better because of this!</unstated> Okay, but write something the critical reader can appreciate.C++ does that! Ada does this!
> C++ violates the separation of contract and implementation when inline functions are declared.
That's the least of the problems - the fact that C++ classes have to list their private parts in the class for all the world to see should be more of a concern.
I suppose you could do this
Where only foo.cpp implementation files get to include foo_private.h and all the things it offers.Code:class foo_private; class foo { public: foo(); ~foo(); private: foo_private *private; };
On the plus side, this may help to stop rebuild cascades when you change some base class and EVERYTHING has to be rebuilt because of it.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
That "Comparison of Ada and C++ Features" was done before C++ was standardised, so it is out of date.
Look up a C++ Reference and learn How To Ask Questions The Smart WayOriginally Posted by Bjarne Stroustrup (2000-10-14)
Also known as the PIMPL idiom and widely used.Originally Posted by Salem
All the buzzt!
CornedBee
"There is not now, nor has there ever been, nor will there ever be, any programming language in which it is the least bit difficult to write bad code."
- Flon's Law