By Gopalan Nadathur (auth.), Herbert Kuchen, Kazunori Ueda (eds.)

This publication constitutes the refereed court cases of the fifth foreign Symposium on sensible and good judgment Programming, FLOPS 2001, held in Tokyo, Japan in March 2001.
The 21 revised complete papers awarded including 3 invited papers have been conscientiously reviewed and chosen from forty submissions. The publication bargains topical sections on practical programming, common sense programming, practical good judgment programming, varieties, application research and transformation, and Lambda calculus.

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Functional and Logic Programming: 5th International Symposium, FLOPS 2001 Tokyo, Japan, March 7–9, 2001 Proceedings

This ebook constitutes the refereed court cases of the fifth overseas Symposium on sensible and good judgment Programming, FLOPS 2001, held in Tokyo, Japan in March 2001. The 21 revised complete papers provided including 3 invited papers have been conscientiously reviewed and chosen from forty submissions. The booklet bargains topical sections on practical programming, common sense programming, sensible common sense programming, varieties, software research and transformation, and Lambda calculus.

Extra info for Functional and Logic Programming: 5th International Symposium, FLOPS 2001 Tokyo, Japan, March 7–9, 2001 Proceedings

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There are several important points that this new view of PCC exposes: – The possibility of using non-determinism simplifies the design of the checker and enables the code receiver to use a simple checker even for checking a complex property. – This view of verification exposes a three-way tradeoff between the complexity of the safety policy, the complexity and “smartness” of the checker, and the oracle size. If the verification problem is highly directed, as is the case with typical type-checking problems, the number of non-deterministic choices is usually small, and thus the required oracles are small.

But even LFi -based proof representations are too large for the hundred-thousand line examples that we want to process. In this paper we describe a series of improvements to the PCC architecture that together allow us to process even the largest examples. These improvements range from major changes in the representation and checking of proofs to changes in the way different components of the PCC system communicate. We start in Section 2 with a description, in general terms, of the new proof representation technique that we use.

To verify the current goal the Checker obtains the name of the next clause to be used (rd) from the oracle and unifies its head with the current goal. This leads to the following subgoals, where T and L are not-yet-instantiated logic variables: of(d0 , array(T, L)) i1 ≥ 0 i1 ≤ L To solve the first subgoal the Checker extracts the next clause name (A0 ) from the oracle and unifies the subgoal with its head. The unification succeeds and it instantiates the logic variables T and L to bool and l0 respectively.

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