ALGOL 68S
| Paradigms | Multi-paradigm: concurrent, imperative |
|---|---|
| Family | ALGOL |
| Designed by | Charles H. Lindsey |
| First appeared | 1977 |
| Typing discipline | static, strong, safe, structural |
| Scope | Lexical |
| Implementation language | BLISS |
| Platform | Motorola 680x0, Sun SPARC |
| OS | SunOS, Solaris, GEMDOS |
ALGOL 68S is a programming language designed as a subset of ALGOL 68, to allow compiling via a one-pass compiler.[1] It was mostly for numerical analysis.
Implementations
[edit]A compiler for ALGOL 68S was available for the PDP-11, written in the language BLISS. The multiprocessor version designed for the C.mmp[2] has been preserved at the PDP Unix Preservation Society archive.[3]
Charles H. Lindsey created another implementation of ALGOL 68, named ALGOL 68S, for Sun-3, Sun SPARC (under SunOS 4.1), Sun SPARC (under Solaris 2), Atari ST (under GEMDOS) and Acorn Archimedes (under RISC OS).
Chief differences from ALGOL 68
[edit]The main differences between ALGOL 68 and 68S, as summarised from Appendix 4 of the Informal Introduction,[4] include:
- No union
- No flex, but strings are handled specially
- No arrays inside structures (but references to arrays were allowed) and a similar restriction on arrays of arrays (multidimensional arrays are nonetheless permitted)
- Limits on use of long and short to aid implementing on small computers
- No heap
- No parallel processing
- Limits on the order of declaration and other small syntactic differences to allow one-pass compiling
- No formats
References
[edit]- ^ Hibbard, P.G. (May 1977). "A Sublanguage of ALGOL 68". SIGPLAN Notices. 12 (5): 71–79. doi:10.1145/954652.1781177. S2CID 37914993.
- ^ http://vestein.arb-phys.uni-dortmund.de/~wb/a68s.txt.
{{cite journal}}: Cite journal requires|journal=(help); Missing or empty|title=(help) [permanent dead link] Description of C.mmp A68S implementation. - ^ "Archived copy". www.tuhs.org. Archived from the original on 20 July 2008. Retrieved 13 January 2022.
{{cite web}}: CS1 maint: archived copy as title (link) - ^ Lindsey, C. H.; van der Meulen, S. G. (1977). Informal Introduction to Algol 68. North-Holland.
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