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QuoteRef: boscR9_1973
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Topic:
failure returning functions and expressions
Topic:
notation for declarations
Topic:
semantic grammar
Topic:
if-then-else test chain
ThesaHelp:
references a-b
Topic:
words defined by words
Topic:
functional side effects
Reference
Bosch, R., Grune, D., Meertens, L., "Aleph, a language encouraging program hierarchy", Amsterdam, Holland, Mathematical Center IW, September 1973. Google
Notes
very good
QuoteRef: boscR9_1973 ;;4 treats language as a grammar
4 ;;Quote: Aleph defines symbols in terms of phrases and recursion; gives example of merge sort QuoteRef: boscR9_1973 ;;6 flow of control -- index on first element -- if rest of alternative fails the whole rule fails. QuoteRef: boscR9_1973 ;;7 if rule fails, parameters are not passed back
7 ;;Quote: an Aleph predicate or action may have side-effects; a question or function may not
7+;;Quote: an Aleph predicate or question may fail QuoteRef: boscR9_1973 ;;7 use rule type as prefix to rule eg 'action' a+b QuoteRef: boscR9_1973 ;;8 affix by +, local variable by =, prefilled local by > before variable and returned local by > after variable
Topic: failure returning functions and expressions (24 items)
Topic: notation for declarations (20 items)
Topic: semantic grammar (23 items)
Topic: if-then-else test chain (18 items)
ThesaHelp: references a-b (396 items)
Topic: words defined by words (24 items)
Topic: functional side effects (11 items)