cangjie-extension

To extend an existing type in Cangjie, use direct extensions to add new member functions, operator overloads, and properties to types like built-in String. This allows you to attach custom behaviors such as a reverse method without modifying the original type definition.

Yes, you can implement interfaces for existing types in Cangjie using interface extensions. This enables types to fulfill contracts defined by interfaces, even if the original type did not explicitly declare it, allowing custom structs to conform to protocols like Displayable.

Cangjie supports applying extensions to generic types with flexible constraints. This allows you to define new functionalities that apply across generic types while respecting specific type boundaries, ensuring type-safe code modularity and extensibility.

The orphan rule in Cangjie governs access control and visibility for extensions. It defines specific rules for how extensions interact with existing types, ensuring that extension implementations respect boundaries for access, export, and import mechanisms within the ecosystem.

You need to use extensions in the Cangjie programming language when you want to enhance or customize existing types with new functionalities. This is particularly useful for adding tailored methods or interface implementations without altering the original source code.

When extending Cangjie built-in types, you must adhere to specific access rules and the orphan rule. These constraints ensure that adding new properties or member functions respects the language's visibility, export, and import mechanisms for safe code modularity.