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Fortress
Developer Sun Labs
Stable release 1.0_5033 (Template:Release date)
Influenced by Fortran, Scala, Haskell
Platform Java SE 1.6+
OS Cross-platform
License BSD

Fortress is a programming language designed for high-performance computing. It was created by Sun Microsystems with funding from DARPA's High Productivity Computing Systems project. One of the language designers is Guy L. Steele Jr., whose previous work includes Scheme, Common Lisp, and Java.

Language features Edit

The name "Fortress" is intended to connote a secure Fortran, i.e., "a language for high-performance computation that provides abstraction and type safety on par with modern programming language principles".[1] Its improvements include implicit parallelism, Unicode support and concrete syntax that is similar to mathematical notation. The language is not designed to be similar to Fortran. Syntactically, it most resembles Scala, Standard ML, and Haskell. Fortress is being designed from the outset to have multiple syntactic stylesheets. Source code can be rendered as ASCII text, in Unicode, or as a prettied image. This will allow for support of mathematical symbols and other symbols in the rendered output for easier reading.

Fortress is also designed to be both highly parallel and have rich functionality contained within libraries, drawing from Java but taken to a higher degree. For example, the 'for' loop is a parallel operation, which will not always iterate in a strictly linear manner depending on the underlying software and hardware. However, the 'for' loop is a library function and can be replaced by another 'for' loop of the programmer's liking rather than being built into the language.

History Edit

Fortress was one of three languages created with funding from the High Productivity Computing Systems project. (The others are X10 from IBM and Chapel from Cray, Inc.) Sun was dropped from the HPCS project in November 2006,[2] leading to uncertainty about the future of Fortress.

In January 2007, Fortress was transformed into "an open-source project with an open-source community. People outside Sun are now writing Fortress code and testing it using the open-source Fortress interpreter."[3] Version 1.0 of the Fortress Language Specification was released in April 2008, along with a compliant implementation targeting the Java Virtual Machine.

In July 2012, it was announced that active development on Fortress would cease after a brief winding-down period, citing complications with using Fortress's type system on existing virtual machines.[4]

See also Edit

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ReferencesEdit

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External linksEdit

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