Clozure CL (CCL) is a

Common Lisp Common Lisp (CL) is a dialect of the Lisp programming language, published in ANSI standard document ''ANSI INCITS 226-1994 (S20018)'' (formerly ''X3.226-1994 (R1999)''). The Common Lisp HyperSpec, a hyperlinked HTML version, has been derived fro ...

implementation. It implements the full ANSI Common Lisp standard with several extensions ( CLOS MOP, threads, CLOS conditions, CLOS streams, ...). It contains a command line development environment, an experimental integrated development environment (IDE) for Mac OS X using the Hemlock editor, and can also be used with

SLIME Slime may refer to: Biology * Slime mold, a broad term often referring to roughly six groups of Eukaryotes * Biofilm, an aggregate of microorganisms in which cells adhere to each other and/or to a surface * Slimy (fish), also known as the pony ...

(a Common Lisp development environment for

GNU Emacs GNU Emacs is a free software text editor. It was created by GNU Project founder Richard Stallman, based on the Emacs editor developed for Unix operating systems. GNU Emacs has been a central component of the GNU project and a flagship project of ...

). Clozure CL is

open source Open source is source code that is made freely available for possible modification and redistribution. Products include permission to use the source code, design documents, or content of the product. The open-source model is a decentralized sof ...

and the project is hosted by Clozure Associates.

Supported platforms

Clozure CL supports the

Mac OS X macOS (; previously OS X and originally Mac OS X) is a Unix operating system developed and marketed by Apple Inc. since 2001. It is the primary operating system for Apple's Mac (computer), Mac computers. Within the market of ...

Linux Linux ( or ) is a family of open-source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991, by Linus Torvalds. Linux is typically packaged as a Linux distribution, which ...

FreeBSD FreeBSD is a free and open-source Unix-like operating system descended from the Berkeley Software Distribution (BSD), which was based on Research Unix. The first version of FreeBSD was released in 1993. In 2005, FreeBSD was the most popular ...

Solaris Solaris may refer to: Arts and entertainment Literature, television and film * ''Solaris'' (novel), a 1961 science fiction novel by Stanisław Lem ** ''Solaris'' (1968 film), directed by Boris Nirenburg ** ''Solaris'' (1972 film), directed by ...

and

Microsoft Windows Windows is a group of several proprietary graphical operating system families developed and marketed by Microsoft. Each family caters to a certain sector of the computing industry. For example, Windows NT for consumers, Windows Server for serv ...

platforms. There are 32 and 64 bit

x86 x86 (also known as 80x86 or the 8086 family) is a family of complex instruction set computer (CISC) instruction set architectures initially developed by Intel based on the Intel 8086 microprocessor and its 8088 variant. The 8086 was introd ...

variants for each. Additionally, there are

PowerPC PowerPC (with the backronym Performance Optimization With Enhanced RISC – Performance Computing, sometimes abbreviated as PPC) is a reduced instruction set computer (RISC) instruction set architecture (ISA) created by the 1991 Apple Inc., App ...

ports for Mac OS X and Linux, and a 32-bit

ARM In human anatomy, the arm refers to the upper limb in common usage, although academically the term specifically means the upper arm between the glenohumeral joint (shoulder joint) and the elbow joint. The distal part of the upper limb between the ...

port for Linux.

Applications

Clozure CL was used by

ITA Software ITA Software is a travel industry software division of Google, formerly an independent company, in Cambridge, Massachusetts. The company was founded by Jeremy Wertheimer, a computer scientist from the MIT Artificial Intelligence Laboratory and Coo ...

for the business logic of a new Airline Reservation System. Clozure CL is also commonly used as an underlying Common Lisp implementation for the ACL2 theorem prover.

History

Formerly known as OpenMCL, Clozure CL is an evolution of

Macintosh Common Lisp Macintosh Common Lisp (MCL) is an implementation and IDE for the Common Lisp programming language. Various versions of MCL run under the classic Mac OS (m68k and PPC) and Mac OS X. Versions of MCL up to and including 5.1 are proprietary. Vers ...

Technology

CCL contains a precise, generational, compacting garbage collector. CCL's compiler produces native instructions for Lisp expressions and files. By default every expression entered at the REPL is compiled to native code. Lisp threads are implemented as preemptively-scheduled, native operating-system threads. CCL implements built-in facilities to easily interface with C and Objective-C libraries (Cocoa bridge) and these are used to implement the IDE amongst other things. The IDE (based upon the Hemlock editor) is currently labelled as experimental. An effortCommunity pledge drive
for IDE improvements is underway to improve this.

References

External links

Clozure CL
*

Github Repository and Issue Tracker

Trac for Clozure CL

OpenMCL-Devel mailing list

Clozure CL in Apple's Mac App Store
Common Lisp implementations Common Lisp (programming language) software Cross-platform free software Cross-platform software Free compilers and interpreters Software using the Apache license Software using the LGPL license {{compu-prog-stub