Skip to main content

Upcoming C++ language changes (C++0x)

C++ programming laguage is undergoing interesting language changes.

The delegating constructor is a useful new addition which changes the semantics of throwing an exception from a constructor. As of now, exception raised during execution of any constructor of a class (including base-member initialization list), the destructor of that class is not invoked (for that object). This is because the object never really got created successfully. This will be now longer be true after C++0x is released!!!

Below is a list of some of the upcoming language changes.

* Nearly all of the Library Technical Report (TR1)
* Auto type deduction
* Delegating constructors
* Right angle brackets
* extern templates

Source : Highlights of the April 2006 ISO C++ meeting (Herb Sutter)

Comments

Sajo Jacob said…
thks for posting this. this is new to me
Wed May 10, 10:57:00 AM PDT
Anonymous said…
Good job dude!
Please keep posting.
Wed May 17, 05:44:00 AM PDT
Post a Comment

Popular Content

Want speed? Use constexpr meta-programming!

It's official: C++11 has two meta-programming languages embedded in it! One is based on templates and other one using constexpr . Templates have been extensively used for meta-programming in C++03. C++11 now gives you one more option of writing compile-time meta-programs using constexpr . The capabilities differ, however. The meta-programming language that uses templates was discovered accidently and since then countless techniques have been developed. It is a pure functional language which allows you to manipulate compile-time integral literals and types but not floating point literals. Most people find the syntax of template meta-programming quite abominable because meta-functions must be implemented as structures and nested typedefs. Compile-time performance is also a pain point for this language feature. The generalized constant expressions (constexpr for short) feature allows C++11 compiler to peek into the implementation of a function (even classes) and perform optimization...
37 comments
Read more

Multi-dimensional arrays in C++11

What new can be said about multi-dimensional arrays in C++? As it turns out, quite a bit! With the advent of C++11, we get new standard library class std::array. We also get new language features, such as template aliases and variadic templates. So I'll talk about interesting ways in which they come together. It all started with a simple question of how to define a multi-dimensional std::array. It is a great example of deceptively simple things. Are the following the two arrays identical except that one is native and the other one is std::array? int native[3][4]; std::array<std::array<int, 3>, 4> arr; No! They are not. In fact, arr is more like an int[4][3]. Note the difference in the array subscripts. The native array is an array of 3 elements where every element is itself an array of 4 integers. 3 rows and 4 columns. If you want a std::array with the same layout, what you really need is: std::array<std::array<int, 4>, 3> arr; That's quite annoying for...
20 comments
Read more

Fun with Lambdas: C++14 Style (part 1)

It's common knowledge that Functional Programming is spreading like a wildfire in mainstream languages. Latest promoted languages: Java 8 and C++, both of which now support lambdas. So, let the lambdas begin! and may the fun be ever on your side. The same text is available in slides form on Slideshare . This blog post and the talk/slides are inspired by JSON inventor  Douglas Crockford . Write an Identity function that takes an argument and returns the same argument . auto Identity = [](auto x) { return x; }; Identity(3); // 3 Write 3 functions add, sub, and mul that take 2 parameters each and return their sum, difference, and product respectively. auto add = [](auto x, auto y) { return x + y; }; auto sub = [](auto x, auto y) { return x - y; }; int mul (int x, int y) { return x * y; }; Write a function, identityf, that takes an argument and returns an inner class object that returns that argument . auto identityf = [](auto x) { class Inner { int x; publi...
20 comments
Read more