Many of the current implementations are portable (DOS, Windows, Linux (32- and 64-bit), Unix (32- and 64-bit), and Mac OS X), supporting many language extensions ( /index.asp?page=product/extensions), and have greatly extended runtime libraries, as well as various Replaceable Database Drivers (RDD) supporting many popular database formats, like DBF, DBTNTX, DBFCDX (FoxPro, Apollo, Comix, and Advantage Database Server), MachSix (SIx Driver and Apollo), SQL, and more. The Clipper language is being actively implemented and extended by multiple organizations/vendors, like X Base++ from Alaska Software and FlagShip, as well as free (GPL-licensed) projects like Harbour and x Harbou r.

Nantucket's Aspen project later matured into the Windows native-code Visual Objects compiler. As the product matured, it remained a DOS tool for many years, but added elements of the C programming language and Pascal programming language, as well as OOP, and the code-block data-type (hybridizing the concepts of dBase macros, or string-evaluation, and function pointers), to become far more powerful than the original. GrafX Software licensed CA-Clipper in 2002 from CA for ongoing marketing and distribution. Clipper was created by Nantucket Corporation led by Barry ReBell (management) and Brian Russell (technical), and later sold to Computer Associates. obj files) which gave the impression that it was compiled to native code. As a technical marketing ploy, the p-code was wrapped into object code (linkable. p-code is considerably faster, but still not as fast as the machine code generated by native compilers.

Compiling dBASE code changes it from interpreted code, which must be interpreted every time each line of code is executed, to p-code, which uses a Virtual Machine to process the compiled p-code. 1 History 2 Programming in Clipper 3 Version history 4 External links Clipper was originally created in 1985 as a compiler for dBASE III, a very popular database language at the time. Although it is a powerful general-purpose p rogramming language, it was primarily used to create database/business programs. Appeared in 1985 Stable release CA Clipper 5.3b (May 20, 1997) OS DOS Clipper From Wikipedia, the free encyclopedia Clipper is a computer programming language that is used to create software programs that originally operated primarily under DOS.

Clipper Compiler For Windows