Trilogy
<language> A
strongly typed logic programming language with numerical
constraint-solving over the natural numbers, developed by Paul Voda <
[email protected]> at UBC in 1988.
Trilogy is syntactically a blend of
Prolog,
Lisp, and
Pascal.
It contains three types of clauses: predicates (
backtracking but no assignable variables), procedures (if-then-else but no backtracking; assignable variables), and subroutines (like procedures, but with input and system calls; callable only from top level or from other subroutines).
Development of Trilogy I stopped in 1991.
Trilogy II, developed by Paul Voda 1988-92, was a declarative general purpose programming language, used for teaching and to write
CL.
(http://www.fmph.uniba.sk/~voda).
["The Constraint Language Trilogy: Semantics and Computations", P. Voda, Complete Logic Systems, 741 Blueridge Ave, North Vancouver BC, V7R 2J5].
