cangjie-macro

Cangjie macros enable compile-time code generation by defining non-attribute, attribute, or nested macros to transform AST nodes, reducing boilerplate. You parse and traverse Abstract Syntax Tree nodes using `std.ast` to automate tasks like generating `toString` methods.

AST manipulation in Cangjie involves parsing tokenized code into Abstract Syntax Tree nodes, traversing these nodes, and applying transformations using `std.ast`. This metaprogramming mechanism allows developers to modify code structure during compilation for custom DSL creation.

In the Cangjie language, you can define non-attribute macros, attribute macros, nested macros, and communicating macros. These macro types facilitate advanced metaprogramming by allowing developers to intercept and transform code at compile-time.

You need compile-time macros in Cangjie when you want to reduce boilerplate code, implement compile-time memoization, or create domain-specific language (DSL) extensions. Macros operate on the AST during compilation, allowing code generation before runtime execution.

Yes, you can define a non-attribute macro in Cangjie to automatically generate a `toString` method for classes. By manipulating AST nodes during compilation, the macro injects the method definition dynamically, eliminating manual boilerplate code.

The best way to create a domain-specific language (DSL) extension in Cangjie is by using macros for metaprogramming. By defining nested or attribute macros and manipulating the AST via `std.ast`, you can translate custom DSL syntax into standard Cangjie code at compile-time.