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EQL: the language and its implementation

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2 Author(s)
Jayaraman, B. ; Dept. of Comput. Sci., Univ. of North Carolina, Chapel Hill, NC, USA ; Gupta, G.

EqL, a general-purpose language that combines the capabilities of functional and logic programming languages, is described. A program in EqL consists of a collection of conditional, pattern-directed rules, where the conditions are expressed as a conjunction of equations, and the patterns are terms built up of data-constructors and basic values. The computational paradigm in EqL is equation solving. Examples illustrating the major features of the language, nondeterminism, deferred evaluation of primitives, and logical variables are presented. The aspects of a sequential implementation for EqL, such as compile-time flattening of equations, run-time equation-delaying, and last-equation optimization, are also described

Published in:

Software Engineering, IEEE Transactions on  (Volume:15 ,  Issue: 6 )

Date of Publication:

Jun 1989

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