Zolo by Example

Learn Zolo by reading short, runnable examples — from basics to advanced.

Start from the beginning

Act 1 — Fundamentals

01

Hello & Comments

Hello, World! Comments

02

Primitives & Numbers

Integers & Floats Number Bases Numeric Types Booleans Nil & Optional

03

Variables and Bindings

Overview Bindings: let, let mut and var Constants and Override Type Annotations and Optionals Shadowing and Scope Destructuring Storage Classes and Discard

04

Operators

Arithmetic Comparison and Logic Ranges and Spread Pipeline Nil Safety Fallible Chaining

05

Control Flow

if / else Loops Match defer

Act 2 — Functions & Logic

06

Functions

Named Functions Lambdas and Closures Flexible Parameters Multiple Returns and Recursion Higher-Order Functions Generators and Coroutines

07

Pattern Matching

Basic Patterns: Literals, Wildcard and Binding Or Patterns, Ranges and Guards Binding with @ Destructuring: Tuples, Arrays, Structs and Enums Nested Patterns Patterns in Statements: if let, while let, let else and match-expression

08

Error Handling

Result: success or error as a value The ? Operator Result Combinators Optionals panic, try/catch and catch_panic defer, defer_ok and defer_err Guards and early return

Act 3 — Data & Types

Act 4 — Abstraction

12

Object-Oriented Programming

impl Blocks and Instance Methods Associated Functions and Multiple impl Blocks Traits Generics Trait Bounds Implementing Std Traits Operator Overloading, to_string, and Chaining

Act 5 — Metaprogramming

13

Decorators

Result Caching Performance and Diagnostics Structs: Derive and Validation Tests and Benchmarks with the Runner HTTP Routes and API Quality Composition and Custom Decorators

14

Macros

Definition and Invocation stringify! and assert! Hygiene, Recursion, and Block Arguments Logging DSL macro_rules!

15

Compile-Time Evaluation

comptime block comptime functions Recursion, loops, and tables stdlib and file embedding const_assert

16

Reflection & Metaprogramming

Compile-Time Field Names Runtime Reflection Decorators as Inert Data Compile-Time Serialization Template ORM: Generate CREATE TABLE Derive Validation Rules UI Form Generation OpenAPI / JSON Schema Generation Generic Derive Function Runtime Debug Introspection Built-In Derives Custom Derive Derive: SQL Column List Derive: Full DB Table DDL

17

Schemas

Default Values Field Introspection Parse and Serialize `where` Constraints

Act 6 — Project Structure

18

Modules

mod and use Visibility and pub Import styles Native plugins and stdlib Inline modules and granular visibility Multi-file project

19

Documentation

Comments Doc Comments Doc Tags Self-Documenting Code

20

Module Directives

requires — Gating Capabilities enable — Activating Optional Features

21

Lifecycle Hooks

Shutdown Hook Multiple Hooks Panic and Signals

Act 7 — Concurrency & Reactivity

Act 8 — Standard Library

Act 9 — Platform & Apps

Act 10 — Build, Test & Ship

32

Testing

Matchers with expect() Suites with @suite Test Attributes Lifecycle Hooks

33

Compilation

run vs build --emit Flags Release Build compile and bundle

34

WebAssembly

Emit Wasm Host Profiles Export Functions Arrays in Wasm

35

Distribution

.zar and .zex Files Standalone Binary GUI and Windowed

36

OS Integration

File Associations

Act 11 — Appendix

37

Keyword Reference

Keyword Reference