Language Request: Alloy

Alloy Specification Language

Alloy specification language is a formal language used for describing the properties and behaviors of software systems. It is often used in software engineering for modeling and analyzing complex systems, particularly those that involve concurrency, distribution, and security.

Alloy allows developers to define abstract models of a system and then use its language constructs to specify constraints on the model. These constraints can represent system requirements, design decisions, or properties that must hold for the system to function correctly.

The language has a simple syntax and a powerful analysis engine that can check the consistency and completeness of the model, detect errors and inconsistencies, and generate test cases. It also provides a graphical user interface for visualizing the models and analyzing the results of the analysis.

Alloy is designed to be used in combination with other software engineering tools and techniques, such as design patterns, architecture models, and testing frameworks. Its flexibility and expressive power make it suitable for a wide range of applications, from modeling small software components to specifying complex distributed systems.

Additional resources
The Alloy Documentations: https://alloy.readthedocs.io/en/latest/language/index.html

the language looks like this:

pred delete [pb : PassBook, url : URL, user : Username] {
	one pb.password[user][url]
	pb.password' = pb.password - (user -> url -> Password)
}

Start by reviewing Prism's existing language definitions and the linked Alloy documentation, using the supplied predicate as the syntax example. Done means Alloy code receives syntax highlighting; the issue names no implementation file or test, so the relevant validation path still needs to be located.