I+: A multiparadigm language for object-oriented declarative programming

Ng, Ka Ying Bonnie; Luk, Chi-Keung

doi:10.1016/0096-0551(95)00003-m

Cited by 10 publications

(10 citation statements)

References 9 publications

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“…Some multiparadigm languages (such as L3P [5] and I+ [6]) support interfacing between paradigrnatically pure (or nearly pure) modules [7], and don't easily support this hybrid approach. But we believe that the value ofmultiparadigm programming goes beyond the interfacing of different modules, and must include the merging of language elements to create new hybrid solutions to problems.…”

Section: Merge Pointsmentioning

confidence: 99%

Multiparadigm design of a simple relational database

Knutson¹,

Budd²,

Vidos³

2000

SIGPLAN Not.

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Multiparadigm programming languages (such as Leda) seek to merge elements of several programming paradigms into a single cohesive language that utilizes programming and conceptual aspects from various paradigms (including imperative, object-oriented, functional and logic). While there are relatively few fully multiparadigm languages, most popular languages increasingly incorporate aspects from multiple paradigms. Despite the fact that multiparadigm programming is an increasing reality, there are few methods for multiparadigm design. This paper uses Leda to explore multiparadigm program design via a simple database example. This paper is exploratory in nature, and exposes areas that should be researched further.The preeminent programming paradigm has historically been imperative. As high-level imperative programming languages (such as Fortran, Cobol, and C) gained popularity, design and analysis methods grew to match them. These methods provide a framework for reducing a problem into its composite parts. They also tend to match the underlying imperative paradigm, decomposing problems into two basic parts: 1) data, and 2) functions or procedures that operate on that data.Programming is now moving strongly toward the object-oriented paradigm. Languages such as C++ and Java have emerged as languages of choice within this paradigm. With the rise of these object-oriented languages, corresponding methods have emerged for design and analysis. These methods also provide a framework for reducing a problem intO its composite parts. In the object-oriented world, these parts take the form of class hierarchies with data and methods encapsulated in classes.Functional and logic programming languages have never risen in popularity the way imperative and object-oriented languages have. As a result, there is a dearth of information on how to perform design and analysis of programming problems from a functional or logic programming perspective, and there are few formal methods to aid in appropriate problem decomposition.The multiparadigm language Leda [1] merges elements from these four paradigms into a single cohesive language. Multiparadigm languages have yet to gain widespread popularity, although most popular languages are increasingly incorporating aspects from multiple paradigms.~ As a result, few methods for multiparadigm design currently exist, and none directly address the issues raised specifically by these four paradigms.This paper seeks to explore multiparadigm program design through a simple database example using the multiparadigm language Leda. This paper is exploratory in nature, and seeks to expose areas that should be researched further. Example: A Simple Relational DatabaseTypically an analysis phase precedes design. During analysis, we try to understand user or customer requirements. During this phase, we discuss objects and dements that are meaningful to the user, and attempt to do so without strongly tainting the. analysis with a particular paradigm. Unfortanatcly, this is easier said then done. If the gap betw...

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Section: Merge Pointsmentioning

confidence: 99%

Multiparadigm design of a simple relational database

Knutson¹,

Budd²,

Vidos³

2000

SIGPLAN Not.

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“…I + model [21] supports the distribution of objects, which implement methods using functions (functional classes) and predicates (logic classes). The implementation is based on the translation of functional classes into Lazy ML (LML) modules and translation of logic classes into Prolog modules.…”

Section: Related Workmentioning

confidence: 99%

“…Each paradigm has sources of implicit parallelism, for example, AND parallelism and OR parallelism in logic programming [4,27]. Another example is object-oriented paradigm that allows the exploitation of inter-object parallelism and intra-object parallelism [9,21]. The multiparadigm approach integrates paradigms.…”

Section: Introductionmentioning

confidence: 99%

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Multiparadigm Model Oriented to Development of Grid Systems

Barbosa

Costa

Yamin

et al. 2004

Computational Science - ICCS 2004

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Abstract. Multiparadigm approach integrates programming language paradigms. We propose Holoparadigm (Holo) as a multiparadigm model oriented to development of grid systems. Holo uses a logic blackboard (called history) to implement a coordination mechanism. The programs are organized in levels using abstract entities called beings. First, we describe the principal concepts of the Holoparadigm. After, the principles of a language based on the Holoparadigm are presented. Besides, we propose the Grid Holo (GHolo), a platform to support the multi-domain heterogeneous distributed computing of programs developed in Holo. GHolo is based on object mobility and blackboards. This distributed model can be fully implemented on Java platform.

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“…They usually define just a small piece of functionality and, combined with multiple inheritance, can cut down on the code duplication that arises when the language allows inheritance only at the class level. Another approach to fine-grained inheritance is found in the language I + [14]. I + inheritance is not determined by subclassing, but by explicitly listing the methods to inherit.…”

Section: Alternatives To Traditional Inheritancementioning

confidence: 99%

Similarity inheritance: a new model of inheritance for spreadsheet VPLs

Djang

Burnett

Proceedings. 1998 IEEE Symposium on Visual Languages (Cat. No.98TB100254)

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Although spreadsheets can be argued to be the most widely-used visual programming languages (VPLs) today, most are very limited compared to other VPLs, supporting only a few built-in types and offering only primitive support for code reuse. The inheritance mechanisms of object-oriented programming might seem to offer help for the latter problem, but incorporating these mechanisms in a traditional way would introduce concepts foreign to spreadsheets, such as message passing. In this paper, we present similarity inheritance, a new approach to inheritance that is suitable for seamless integration into the spreadsheet paradigm. We first explain the model independently of any implementation, and then present a prototype implementation in the research spreadsheet VPL Forms/3. We show that bringing inheritance functionality to the spreadsheet paradigm can be done using the widely-understood idea of copy/paste. Further, we show why the approach requires the presence of a live, visual environment.

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I+: A multiparadigm language for object-oriented declarative programming

Cited by 10 publications

References 9 publications

Multiparadigm design of a simple relational database

Multiparadigm design of a simple relational database

Multiparadigm Model Oriented to Development of Grid Systems

Similarity inheritance: a new model of inheritance for spreadsheet VPLs

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