RRust By Example

Functions

Functions, closures, and higher-order functions.

6 examples

Basics Ownership Compound Types Flow Control Functions Generics Traits Error Handling Collections Concurrency Async Smart Pointers Iterators Patterns Modules Macros Unsafe Lifetimes Testing File I/O Serialization CLI

beginner1 examples

Functions Basic

Define and call functions with parameters and return values.

intermediate3 examples

Closures Basic

Anonymous functions that capture their environment.

Function Pointers

Use function pointers (fn) as arguments and return values.

Higher-Order Functions

Functions that take or return other functions.

advanced2 examples

Diverging Functions

Functions that never return using -> ! (never type).

Returning Closures

Return closures from functions using impl Fn or Box<dyn Fn>.