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A Formal Specification of a Programming Language Design of Pit

A Formal Specification of a Programming Language Design of Pit 2025

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The document presents a formal specification of the Pit programming language using Z notation, focusing on its unique feature of allowing programmers to choose between manual and automatic memory management through statically-typed 'primitive' variables and dynamically-typed 'auto' variables. It emphasizes the importance of formal methods in enhancing software quality and correctness, particularly in compiler development. The paper details the semantics and operations of auto variables, their implementation, and the benefits of a formal specification for ensuring consistency and understanding in language design.

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What is program specification in programming?

Programs are written in a precisely and formally defined programming language, e.g., Java, C, Pascal. A program specification describes the results that a program is expected to produce -- its primary purpose is to be understood not executed. Specifications provide the foundation for programming methodology.

What is an example of a formal specification?

A formal specification is a precise, unambiguous specification of the functionality of a software system. Examples: a program that implements the system (low level of abstraction) a mathematical description of the system using first order predicate logic.

How are programming languages formally defined?

Programming languages are described in terms of their syntax (form) and semantics (meaning), usually defined by a formal language. Languages usually provide features such as a type system, variables, and mechanisms for error handling.

What is a formal design specification?

Formal specifications describe what a system should do, not how the system should do it. A good specification must have some of the following attributes: adequate, internally consistent, unambiguous, complete, satisfied, minimal. A good specification will have: Constructability, manageability and evolvability.

What is formal in programming language?

Formal means well defined. Every programming language that can be used to define executable programs has to be well defined so that machines can understand it.

What are the components of formal specification language?

A formal specification language is usually composed of three primary components or in mathematical term we can say that it consists of two sets, syntax and semantics and a set of relation [2]. objects properly satisfy the specification.

What is formal verification and specification?

In general, formal verification consists of mathematically establishing that an implementation satisfies its specification. The implementation refers to the system design which should be verified. This entity can represent a design description at any level of the system abstraction hierarchy.

A Formal Specification of a Programming Language Design of Pit 2025

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