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Edward Palonek's programming rss feed: comp.lang.c++ Google Group

• Re: Warning I could expect to have a bit of help from the name.
  At one point abstraction creates its own artifact and becomes an
  ontology of your problem/solution space. Saying that something 'is-a'
  <foo> only reflects some organization of the thinking process.
  It is not a bad thing, it is just that one name (is-a) is used to Wed, 10 Mar 2010 11:50:11 UT
• Re: A job for lambda expressions? All you need to do is to decide which of the coordinates
  is the ordinate and which is the abscissa. In the (x,y)
  case you use x as the ordinate and y as the abscissa.
  In the (y,z) case you use y as the ordinate and z as the
  abscissa, and so on. Apart from that, all the algorithms
  are the same.
  What one needs is the internal functions Wed, 10 Mar 2010 10:16:16 UT
• Re: Using the Boost Parameter Library in a class hierarchy * Alf P. Steinbach:
  Oops. I was stupid. Now I'm much smarter, just in the span of some hours. :-)
  <code>
  using namespace std;
  namespace abstractButton {
  BOOST_PARAMETER_NAME( none ) // Just to create "empty" ArgumentPack.
  BOOST_PARAMETER_NAME( hTextAlign )
  struct AbstractButton
  {
  struct Params Wed, 10 Mar 2010 10:07:41 UT
• Re: initialization order of function local static variables * Severin Ecker:
  The key is "namespace scope".
  In your example
  void x() {
  static Foo foo;
  }
  the object "foo" is not at namespace scope -- it's a local object of static
  storage duration, as opposed to a namespace scope object of static storage
  duration, which is why the wording above contains both phrases, "namespace Wed, 10 Mar 2010 09:48:47 UT
• Re: initialization order of function local static variables Hi Alf,
  I think this also applies to constant initialization from what i read here.
  In that case I don't quite understand 3.6.2/2
  "An implementation is permitted to perform the initialization of an
  object of namespace scope with static storage duration as a static
  initialization even if such initialization is not required to be done Wed, 10 Mar 2010 08:39:36 UT
• Re: initialization order of function local static variables * Severin Ecker:
  I think so, yes. But note that this is zero initialization. Which is a distinct
  phase from dynamic initialization.
  Yes.
  It was never allowed to do early initialization in general. Static zero
  initialization is a distinct phase from dynamic initialization like calling
  constructors. The dynamic initialization is (in the case we're considering) Wed, 10 Mar 2010 07:20:16 UT
• Using the Boost Parameter Library in a class hierarchy Some time ago (years?) I posted a question here about ideas for implementing
  option packs, corresponding to optional arguments, that could be extended
  through derivation, and came up with a pure C++ solution -- another
  possibility mentioned then was code generation using a script.
  Looking into essentially the same issue I now found that it's /possible/ to use Wed, 10 Mar 2010 07:09:21 UT
• Re: Will this piece of code cause memory leak? You've already got three good replies, the only thing I think missing
  from those is if the "assert" function above is not the version from
  cassert / assert.h, but rather something you've written that throws an
  exception, then - if you have some reason to need it on the heap
  rather than using std::vector<> as already suggested, you can use make Wed, 10 Mar 2010 04:58:20 UT
• Re: A job for lambda expressions? Your algorithms don't have to be aware. Consider:
  class Point1
  {
  public:
  Point1(int x, int y) : x_(x), y_(y) { }
  int x() const { return x_; }
  int y() const { return y_; }
  friend std::ostream& operator<<(std::ostream& os, const Point1& p)
  {
  return os << '(' << p.x_ << ',' << p.y_ << ')'; Wed, 10 Mar 2010 02:43:13 UT
• Re: C++ Workshop data types cont...to agregate datatypes C++ Integer types - Data Representation
  Constant and Literal Integers are represented as numbers without any
  quotes. They can be represented in decimal, octal, and Hexadecimal
  forms. They can be assigned to int, short, long and signed and unsigned
  variables and they are literal, and therefor can not be left values: ie Wed, 10 Mar 2010 02:25:54 UT
• Re: Warning You just have to understand what "is-a" means. It has to do with
  abstraction levels.
  The answer to the "is a circle an ellipse, or is an ellipse a circle"
  problem is simple: Neither. Not from an object-oriented design point of
  view. Both a circle and an ellipse are at the *same* abstraction level Tue, 09 Mar 2010 23:58:31 UT
• Re: Will this piece of code cause memory leak? DT wrote:
  An assertion failure will end the program right there, so leaking
  memory is not an issue.
  I would be more worried about other things that can be leaked, like
  temporary files (which will, naturally, remain on the disk if not
  removed by the program itself).
  --- news://freenews.netfront.net/ - complaints: n...@netfront.net --- Tue, 09 Mar 2010 23:52:19 UT
• initialization order of function local static variables Hi,
  I have a question regarding the initialization order/point in time of
  function local objects with static storage duration (C++ standard
  sections 6.7.4 and 3.6.2).
  Please consider the following code snippet:
  x.cpp
  void x() {
  static Foo foo;
  y.cpp
  void y() {
  static Bar bar;
  main.cpp
  // assume proper inclusion of header files Tue, 09 Mar 2010 23:48:11 UT

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