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Language peer sets for ALGOL 68RS:
United Kingdom↑
United Kingdom/1972↑
Designed 1972 ↑
1970s languages ↑
Third generation↑
High Cold War↑
Genus True ALGOL68s ↑
Numerical Scientific ↑
True ALGOL68s↑
Generation of Algol 68↑
Algol family ↑
True ALGOL68s/1972↑
Generation of Algol 68/1972↑
Algol family/1972↑
True ALGOL68s/United Kingdom↑
Generation of Algol 68/United Kingdom↑
Algol family/United Kingdom↑
Numerical Scientific ↑
Numerical Scientific/1972↑
Numerical Scientific/uk ↑

ALGOL 68RS(ID:1808/alg045)

Extended RS Algol 

alternate simple view
Country: United Kingdom
Designed 1972
Published: 1972
Genus: True ALGOL68s
Sammet category: Numerical Scientific

Royal Signals and Radar Establishment, Malvern UK. An extension of ALGOL 68 supporting function closures. Has been ported to Multics and VAX/VMS.

Used to write FLEX system for PERQ, also used to write ELLA portable description language, ALGOL 68 RS to C translator shipped as part of ELLA

Joint effort of Bath, Ofort and RSRE, first implemented on ICL and part sponsored by them. Became corporatised as

The systems development group at SWURCC, including the compiler
people, were split off to form Praxis. Praxis were funded by RSRE/DRA
to produce an ALGOL 68RS to C translator ("ctrans") in order to port
the ELLA (hardware description language) compiler and simulator to Sun
Sparc and Apollo workstations.


Praxis Electronic Design (which looked after ELLA, amongst other
things) was split off and sold, but went bust after a couple of years.
DRA decided then to make ELLA public domain, and funded some more work
from Praxis (ie me) to improve the portability of Ctrans and its
generated code, and to make it ANSI C compliant. DRA now own the
rights, and have made Ctrans publically available as part of their
ELLA distribution.


Missing features:
indicators to be declared before use
no sema
scopes not checked

Extra features:
mode vector indexable structures forall elements of array
no transient name restriction
modular compilation
Related languages
ALGOL 68-R → ALGOL 68RS   Evolution of
ALGOL 68RS → RS Algol   Evolution of
References:
  • (1985) Survey of Viable ALGOL 68 Implementations (AB52.3.1 in Algol Bulletin 52) Abstract
  • Greenwood, J. R. (1986) Greenwood, J. R. "Comments on 'A View from the Trenches'. Ada vs. Modula-2 vs. Praxis."
          in [SIGPLAN] (1986) SIGPLAN Notices 21(05) May 1986
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