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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

An operational approach to semantics and translation for programming languages

Li, Wei January 1983 (has links)
The problems of semantics and translation for concurrent programming languages are studied in this thesis. A structural operational approach is introduced to specify the semantics of parallelism and communication. Using this approach, semantics for the concurrent programming languages CSP (Hoare's Communicating Sequential Processes), multitasking and exception handling in Ada, Brinch-Hansen's Edison and CCS (Milner's Calculus of Communicating Systems) are defined and some of their properties are studied. An operational translation theory for concurrent programming languages is given. The concept of the correctness of a translation is formalised, the problem of composing transitions is studied and a composition theorem is proved. A set of sufficient conditions for proving the correctness of a translation is given. A syntax-directed translation from CSP to CCS is given and proved correct. Through this example the proof techniques of this approach is demonstrated. Finally, as an application of operational semantics and translation, a proposal for implementing multitasking in Ada is given via a two-step syntax-directed translation.
2

On the semantics of disjunctive logic programs / Sémantique des programmes logiques disjonctifs

Tsouanas, Athanasios 02 July 2014 (has links)
Cette thèse s’intéresse à la sémantique dénotationnelle (en théorie desmodèles et en théorie des jeux) de quatre langages de programmation logique: - LP, le plus restrictif de tous, - DLP, une extension de LP aux disjonctions, - LPN, une extension de LP aux négations, et - DLPN, qui inclut les deux.Ce manuscrit apporte trois contributions principales:(1) Un cadre abstrait pour la sémantique de la programmation logique yest défini, et toutes les approches sémantiques que nous étudions par lasuite prennent place dans ce cadre.Nous définissons la notion générale d'espace de valeurs de vérité commeune structure algébrique spécifique, satisfaisant un certain ensembled'axiomes. Les booléens forment l'exemple canonique d'un tel espace,mais nous devons étudier des cas plus généraux si nous voulonsconsidérer la "négation par l'échec". Pour cela, nous définissons etétudions une famille infinie d'espaces, paramétrée par un ordinal.(2) Une sémantique des jeux pour LP a été définie en 1986, et son étudea été approfondie en 1998. Elle a ensuite été étendue au cas desprogrammes LPN en 2005.Ici nous développons en détails une sémantique pour les programmes DLP.Nous prouvons qu'elle est correcte et complète par rapport aux modèlesminimaux de Minker.(3) Nous définissons un opérateur sémantique qui, étant donnée une sémantique abstraite d'un langage non disjonctif, la transforme en une sémantique disjonctive associée.La correction de cette transformation découle du fait qu'elle conserveles équivalences de sémantiques.Nous en présentons ensuite quelques applications qui permettent, entre autres, d'obtenir la première sémantique des jeux pour DLPN. / In this thesis, we study denotational semantics (model-theoretic andgame-theoretic) of four logic programming languages:- LP which is the most restrictive one;- DLP which extends LP by allowing disjunctions;- LPN which extends LP by allowing negations; and- DLPN which allows both.The three main contributions of this dissertation can be summarized as follows:(1) An abstract framework for logic programming semantics is definedand all semantic approaches that we study are placed within this framework.We define the general notion of a truth value space as an appropriate algebraicstructure that satisfies a set of axioms.The booleans form the canonical example of such a space, but we need toconsider much more general ones when dealing with negation-as-failure. Forthis we define and study an infinite family of spaces, parametrized over anordinal number.(2) A game semantics for LP was defined in 1986 and further studied in 1998.Then in 2005 it was extended for the case of LPN programs.Here a game semantics for DLP programs is developed in full detail; we provethat it is sound and complete with respect to the standard, minimal modelssemantics of Minker.(3) We define a semantic operator which transforms any given abstractsemantics of a non-disjunctive language to a semantics of the"corresponding" disjunctive one. We exhibit the correctness of thistransformation by proving that it preserves equivalences of semantics,and we present some applications of it, obtaining new game semantics forDLPN, among others.

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