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Vala 0.0.6 released

Bag of Software
Bag of Software

We are pleased to announce version 0.0.6 of Vala, a compiler for the
GObject type system.

Changes since 0.0.5
* Improve interface support.
* Support do loops.
* Improve array support.
* Improve enum support.
* Add automated testing infrastructure.
* Fixes for prefix and postfix operators.
* Add more types to GLib bindings.
* Many bug fixes.

Vala is a new programming language that aims to bring modern programming
language features to GNOME developers without imposing any additional
runtime requirements and without using a different ABI compared to
applications and libraries written in C.

valac, the Vala compiler, is a self-hosting compiler that translates
Vala source code into C source and header files. It uses the GObject
type system to create classes and interfaces declared in the Vala source
code. It's also planned to generate GIDL files when gobject-
introspection is ready.

The syntax of Vala is similar to C#, modified to better fit the GObject
type system. Vala supports modern language features as the following:

* Interfaces
* Properties
* Signals
* Foreach
* Lambda expressions
* Type inference for local variables
* Generics [PLANNED]
* Non-null types [PARTIAL]
* Assisted memory management
* Exception handling [PLANNED]

Vala is designed to allow access to existing C libraries, especially
GObject-based libraries, without the need for runtime bindings. Each to
be used library requires a Vala API file at compile-time, containing the
class and method declarations in Vala syntax. Vala currently comes with
experimental bindings for GLib and GTK+. It's planned to provide
generated bindings for the full GNOME Platform at a later stage.

Using classes and methods written in Vala from an application written in
C is not difficult. The Vala library only has to install the generated
header files and C applications may then access the GObject-based API of
the Vala library as usual. It should also be easily possible to write a
bindings generator for access to Vala libraries from applications
written in e.g. C# as the Vala parser is written as a library, so that
all compile-time information is available when generating a binding.

More information about Vala is available at

http://vala.paldo.org/

The Vala Team

Jürg Billeter and Raffaele Sandrini

Unusable for most libraries

Eiffel has some nice ideas and DBC is very interesting but it has many drawbacks for practical use, e.g. you can't develop shared libraries (i.e. .so or .dll libraries) because there is absolutely no ABI-compatibility, IIRC.

Vala, in contrast, can be used wherever you could use gobject/gtk-based C libraries or applications before, you don't lose any compatibility advantages. C applications can use Vala libraries and Vala applications can use C libraries and it'd be easy to generate bindings to Vala libraries for many other languages. The main difference is that Vala is not an island like many of the niche languages, you can mix Vala and C relatively easy and you could even go back anytime to C by just deleting the Vala source files and keeping the generated C code...