BCPL


Also found in: Acronyms, Wikipedia.

BCPL

(language)
(Basic CPL) A British systems language developed by Richards in 1969 and descended from CPL (Combined Programming Language). BCPL is low-level, typeless and block-structured, and provides only one-dimensional arrays. Case is not significant, but conventionally reserved words begin with a capital. Flow control constructs include: If-Then, Test-Then-Else, Unless-Do, While-Do, Until-Do, Repeat, Repeatwhile, Repeatuntil, For-to-By-Do, Loop, Break and Switchon-Into-Case-Default-Endcase. BCPL has conditional expressions, pointers, and manifest constants. It has both procedures: 'Let foo(bar) Be command' and functions: 'Let foo(bar) = expression'. 'Valof $(..Resultis..$)' causes a compound command to produce a value. Parameters are call-by-value.

Program segments communicate via the global vector where system and user variables are stored in fixed numerical locations in a single array.

The first BCPL compiler was written in AED. BCPL was used to implement the TRIPOS operating system, which was subsequently reincarnated as AmigaDOS.

["BCPL - The Language and its Compiler", Martin Richards & Colin Whitby-Stevens, Cambridge U Press 1979].

See OCODE, INTCODE.

Oxford BCPL differed slightly: Test-Ifso-Ifnot, and section brackets in place of $( $).

The original INTCODE interpreter for BCPL is available for Amiga, Unix, MS-DOS ftp://wuarchive.wustl.edu/systems/amiga/programming/languages/BCPL/.

A BCPL compiler bootstrap kit with an INTCODE interpreter in C was written by Ken Yap <ken@syd.dit.csiro.au>.
References in periodicals archive ?
However, the Company wants to move into production as quickly as possible and the cash injection it is receiving from BCPL through this arrangement will go towards the Amayapampa exploration programme," Mr Kelly concluded.
BCPL will produce various ranges of polymers for different applications in sectors such as packaging film, roto, injection, raffia and blow moulding.
The new system, named WOW for Window On the World by BCPL, gives customers at all 15 libraries direct access to a network of information resources from terminals that feature a colorful, easy-to-use graphical menu system designed especially by CARL for BCPL.