Unicon (programming language)

Features

Compared with Icon, many of the new features of Unicon are extensions to the I/O and system interface, to complement Icon's core control and data structures. Rather than providing lower-level APIs as-is from C, Unicon implements higher level and easier to use facilities, enabling rapid development of graphic- and network-intensive applications in addition to Icon's core strengths in text and file processing.

Feature list

• Classes and packages
• Exceptions as a contributed class library - see mailing list
• Loadable child programs
• Monitoring of child programs
• Dynamic loading of C modules (some platforms)
• Multiple inheritance, with novel^[1] semantics
• ODBC database access^[2]
• dbm files can be used as associative arrays
• Posix system interface
• 3D graphics^[3]
• True concurrency (on platforms supporting Posix threads)^[4]

When run as a graphical IDE, the Unicon program ui.exe continues to offer links to Icon help.

The official Unicon programming book in PDF format^[5] is a popular way to learn Unicon. The book includes an introduction to object-oriented development as well as UML. It includes useful chapters on topics such as the use of Unicon for CGI. Recent additions to Unicon include true concurrency.

Unicode

Unicon is not yet Unicode-compliant. There are opportunities posted at a help-wanted page.^[6]

Example code

procedure main()
	w := open("test UNICON window", "g")
	write(w, "Hello, World!")
	read(w)
	close(w)
end

See also

• Rebol, a similar web-oriented expression-based language without the use of keywords
• Curl, multi-paradigm web content functional language which is also expression-based but only for client-side
• Coroutine
• Generators
• Continuation

References

External links

• Unicon (programming language) on SourceForge.net
• Unicon Programming book
• Posix Interface for Unicon
• ADAPTING SNOBOL-STYLE PATTERNS TO UNICON
• Java version of Icon
• Unicon at 99-bottles
• Literate programs