Back ري أكس أكس Arabic REXX dili Azerbaijani Rexx Catalan REXX Danish REXX German REXX Spanish REXX Basque REXX Finnish Restructured Extended Executor French REXX HE
 | This article contains instructions, advice, or how-to content. (September 2022) |
 | This article contains a list of miscellaneous information. (September 2022) |
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| Paradigm | multiparadigm: procedural, structured |
|---|---|
| Designed by | Mike Cowlishaw |
| Developer | Mike Cowlishaw, IBM |
| First appeared | 1979 |
| Stable release | ANSI X3.274
/ 1996 |
| Typing discipline | Dynamic |
| Filename extensions | .cmd, .bat, .exec, .rexx, .rex, EXEC |
| Major implementations | |
| VM/SP R3,[1] TSO/E V2,[2] SAAREXX,[3][4] ARexx, BREXX, Regina,[5] Personal REXX, REXX/imc | |
| Dialects | |
| NetRexx, Object REXX, now ooREXX, KEXX | |
| Influenced by | |
| PL/I, ALGOL, EXEC, EXEC 2 | |
| Influenced | |
| NetRexx, Object REXX | |
| |
Rexx (restructured extended executor) is a high-level programming language developed at IBM by Mike Cowlishaw.[6][7] Both proprietary and open source Rexx interpreters exist for a wide range of computing platforms, and compilers exist for IBM mainframe computers.[8] Rexx is used for scripting, application macros and application development. As a general purpose scripting language, Rexx is considered a precursor to Tcl and Python.
Rexx is supported in a variety of environments. It is the primary scripting language in some operating systems including OS/2, MVS, VM, AmigaOS and is used for macros in some software including SPF/PC, KEDIT, THE and ZOC. With an engine installed, Rexx can be used for scripting and macros in programs that use a Windows Scripting Host ActiveX scripting engine (such as VBScript or JScript). Rexx is supplied with VM/SP Release 3 on up, TSO/E Version 2 on up, OS/2 (1.3 and later, where it is officially named Procedures Language/2), AmigaOS Version 2 on up, PC DOS (7.0 or 2000), ArcaOS,[9] and Windows NT 4.0 (Resource Kit: Regina). In the late 1980s, Rexx became the common scripting language for IBM Systems Application Architecture, where it was renamed "SAA Procedure Language REXX".
A script is associated with a Rexx interpreter at runtime in various ways based on context. In mainframe computing, a Rexx script or command is sometimes referred to as an EXEC since that is the name of the file type used for similar CMS EXEC,[10] and EXEC 2[11] scripts and for Rexx scripts on VM/SP R3 through z/VM. The first line of a script specifies the use of a Rexx interpreter in a comment either by identifying the code as Rexx language or by file path via EXTPROC. On MVS, Rexx scripts may[a] be recognized by the low level qualifier "EXEC" or if the first line fetched from SYSPROC is a comment containing "REXX" then it is treated as Rexx (rather than CLIST), and a script fetched from SYSEXEC must be Rexx. On OS/2, Rexx scripts share the filename extension ".cmd" with other scripting languages, and the first line of the script specifies the interpreter to use. On Linux, Rexx scripts generally begin with a shebang. Rexx macros for Rexx-aware applications use extensions determined by the application.
- ^ Virtual Machine/System Product - System Product - Interpreter Reference - Release 3 (PDF) (First ed.). IBM. September 1983. SC24-5239-0. Retrieved November 6, 2024.
- ^ TSO Extensions Version 2 - Procedures Language MVS/REXX Reference (PDF) (Fifth ed.). IBM. August 1991. SC28-1883-4. Retrieved November 6, 2024.
- ^ "Procedures Language". Systems Application Architecture - An Overview (PDF) (First ed.). IBM. May 1987. p. 40. GC26-4341-0. Retrieved November 6, 2024.
- ^ Procdeures Language/2 - REXX Reference - Version 2.00 (PDF). OS/2 2.00 - Technical Library (First ed.). IBM. December 1991. S10G-6268-00. Retrieved November 6, 2024.
- ^ Mark Hessling (October 25, 2012). "Regina Rexx Interpreter". SourceForge project regina-rexx. Retrieved February 10, 2014.
- ^ Cite error: The named reference
RexHistwas invoked but never defined (see the help page). - ^ Cite error: The named reference
RexMay95was invoked but never defined (see the help page). - ^ "Catalog of All Documents (filter=rexx)". IBM library server. 2005. Archived from the original on February 15, 2013. Retrieved February 10, 2014.
- ^ "Does ArcaOS include REXX support?". Retrieved September 3, 2020.
- ^ IBM Virtual Machine Facility /370: EXEC User's Guide (PDF) (Second ed.). International Business Machines Corporation. April 1975. GC20-1812-1.
- ^ EXEC 2 Reference (PDF) (Second ed.). International Business Machines Corporation. April 1982. p. 92. SC24-5219-1. Archived from the original (PDF) on April 2, 2020. Retrieved March 28, 2019.
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