Functional and Constraint Logic Programming, 18th by Santiago Escobar

By Santiago Escobar

This publication constitutes the completely refereed post-conference complaints of the 18th foreign Workshop on practical and Constraint good judgment Programming, WFLP 2009, held in Brasilia, Brazil, in June 2009 as a part of RDP 2009, the Federated convention on Rewriting, Deduction, and Programming. The nine revised complete papers provided including 2 invited papers have been conscientiously reviewed and chosen from 14 preliminary workshop contributions. The papers conceal present study in all parts of useful and constraint good judgment programming together with standard parts of curiosity, equivalent to foundational concerns, language layout, implementation, transformation and research, software program engineering, integration of paradigms, and purposes.

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Additional resources for Functional and Constraint Logic Programming, 18th International Workshop, WFLP 2009, Brasilia, Brazil, June 28, 2009, Revised Selected Papers

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We are planning to apply this approach to theorem proving strategies, such as focusing, that currently rely mainly on syntactic apparatus [1,19] to guide proof search exploration. Application to constraint based specification of reduction strategies also appears quite challenging and remains to be explored. Let us mention that the ability to explicitly use negations or complement problems could be of great help is defining strategies. For instance, the possibility of excluding conflicting assignments from proof exploration is a feature Constraint Based Strategies 25 that is widely used in modern SAT solvers.

Endfm The same program can also be written in OCaml (using Moca [7]). type ’a t = private | Nil | Element of ’a | Concat of ’a t * ’a t begin associative neutral (Nil) end let rec length x = match x with | Nil -> 0 | Element _ -> 1 | Concat (k, l) -> length(k) + length(l) 1 Another recent integration of integers into the term rewriting framework is presented in [16]. The approach of [16] is incomparable to the approach of the present paper. On the one hand, [16] provides a more complete integration of integers since multiplication and division are supported.

7 IlcConstraint c9’ = x’ – y’ == 5 IlcCheckWhenBound c10’( t’,3) Fig. 6. Constraint management with synchronization [17,0] of V has been changed by [17,1], because the variables associated in ILOG are now synchronized. After synchronizing ILOG CP with the equalities produced by the Herbrand solver, we manage the constraint X #- Y == _T. We can see this in the bottom of Fig. 6. T OY continues with the evaluation of the next goal expression. The constraint _T == 5 is sent to the Herbrand solver H.

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