developer-delphi-language-generics

Delphi generics constraints are applied using syntax like `class` or `constructor` to restrict type parameters. This Skill enables developers to declare generic types and methods, ensuring type-safe reusable code across classes and interfaces in Delphi projects.

Built-in Delphi generic collections like TList<T>, TDictionary<K,V>, TQueue<T>, and TStack<T> provide type-safe data storage. This Skill covers their practical usage with real-world examples to accelerate the implementation of reusable collection structures.

The Repository<T> pattern in Delphi uses generics to create a reusable data access layer. This Skill provides templates and practical examples for implementing Repository<T>, Nullable<T>, and Result<T,E> patterns to handle data operations and error management safely.

Nullable<T> handles missing values in Delphi generics, while Result<T,E> encapsulates operation outcomes and errors. This Skill demonstrates when to apply these patterns to build robust, type-safe logic without relying on exceptions for control flow.

Delphi generic constraints support `constructor` to allow creating instances of the type parameter within generic methods. This Skill explains how to apply class, interface, and constructor constraints to guide generic type usage and enforce compile-time type safety.