Genie
Paradigmmulti-paradigm: imperative, structured, object-oriented
Designed byJamie McCracken
First appeared2008; 16 years ago (2008)
Stable release
0.52.3 / May 1, 2021; 2 years ago (2021-05-01)
Typing disciplinestatic, strong
OSCross-platform (every platform supported by GLib)
LicenseLGPLv2.1+
Filename extensions.gs
Websitewiki.gnome.org/Projects/Genie Edit this at Wikidata
Influenced by
Python, Boo, D, Object Pascal

Genie is a modern, general-purpose high-level programming language in development since 2008.[1] It was designed as an alternative, simpler and cleaner dialect for the Vala compiler, while preserving the same functionality of the Vala language. Genie uses the same compiler and libraries as Vala; the two can indeed be used alongside each other.[2] The differences are only syntactic.

Genie's syntax is derived from numerous modern languages like Python, Boo, D and Delphi. In the vein of Python, Genie uses indentation rather than explicit block delimiters (like, for example, curly brackets) to delimit blocks.

Like Vala, Genie uses the GObject type system to create classes and interfaces declared in Genie source code, without imposing additional runtime requirements (i.e., unlike Python, Java or C#, it does not require a virtual machine).

Genie allows access to C libraries, especially those based in GObject (like GTK), without using a different application binary interface (ABI). During compilation, the code is first translated to C source and header files, which are then compiled to platform-specific machine code using any available C compiler like GCC, thus allowing cross-platform software development.

Programs developed in Vala and Genie do not depend on the GNOME Desktop Environment, usually requiring only GLib.

Code samples

"Hello World"

This sample explicitly uses four spaces for indentation.

[indent=4]

init
    print "Hello, world!"

Objects

With no explicit indentation declaration, the default is tabs.

class Sample

	def run()
		stdout.printf("Hello, world! \n ")

init
	var sample = new Sample()
	sample.run() 

Criticism

This section has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages) The neutrality of this section is disputed. Relevant discussion may be found on the talk page. Please do not remove this message until conditions to do so are met. (March 2023) (Learn how and when to remove this template message) Parts of this article (those related to this section) need to be updated. Please help update this article to reflect recent events or newly available information. (June 2019) (Learn how and when to remove this template message)

As of 2013, Genie "for" loops are inclusive, which makes handling of empty lists cumbersome:[3]

var l = new list of string
if l.size > 0
    for var i = 0 to (l.size - 1)
        print l.@get(i)

However, one can also iterate over lists via the for-in construct. This is easy and straightforward:[4]

var l = new list of string
for s in l:
   print s

References

  1. ^ Jamie McCracken (2008). "Introducing Genie - the smart programming language". Archived from the original on 2011-08-18.
  2. ^ Using Genie and Vala together
  3. ^ Tal Liron (11 January 2013). Genie. Event occurs at 32:29. Archived from the original on 2021-12-20.
  4. ^ "Projects/Genie - GNOME Wiki!".