I thought this was interesting… In Java, a block scoped variable may conflict with a local variable declared later in method scope, but not previously (as shown below):

class A{
  public static void main(String args[]){
    {int k = 5;}
    int k = 12; //this is OK
    {int k = 22;}//this is not....
  }
}

This is not the same as C++ where this compiles happily:

int main(){
  {int i;}
  int i;
  {int i;}
  return 0;
}

Usually C++ has the more obscure behavior….

Providing a robust, maintainable, and interactive interface to your C/C++ application can be a challenge, but I’ve found that a combination of SWIG, Java, and JRuby (or Jython if you prefer) makes for a very powerful combination.
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What are the differences and when should I use one or the other?
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This article expands the example from the previous two, here and here, to add more specific error information.

As always the full code from the example is available here here.

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In this article I demonstrate how to write your own check macros for the boost test library (not guaranteed to work in the future)

Full source code for this example can be downloaded here.
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I did a presentation on the spirit library in the flesh recently and was surprised to find the big sticking point was C++ functors. So I thought I’d cover the concept here.

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In the last article we covered how to define a grammar in the boost spirit library. This article will show you how to use the data parsed by the grammar with actions. The code for this example is here.
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I haven’t done a post in a while, but I thought the boost spirit library was worth an entry. Spirit provides a way of specifying and parsing a custom language grammar right inline in C++ without the need for a code generator like lex/yacc. Spirit makes it so easy to specify and use a grammar that you should never hand write even the most trivial parser again.

The full code for this example can be found here.

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From my blog you may notice I am an inveterate C++ coder. It was the first language I taught myself after pascal and my preferred language for compact, fast code.The downfall of C++ may not be news to many, but often it is written by opponents of the language rather than those who love it and all of its quirks. So from a fan, C++, the prognosis is poor. I could write a book on this, but I tried to distill it down to article size.
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The adapter pattern is used to implement an interface required by one library in terms of an object declared in another. It’s a useful pattern, but implementing it can be a pain. You have to manually adapt objects as you get them and then you have to remember to clean up the adapter objects when you are done. Here is a way to have the compiler do it all for you in C++.
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