Chapter 7. Struct Declarations

A struct is a type made from named fields.

8 items

Section	Title
1	Struct Declarations
2	Field Access
3	Methods as Functions
4	Enums
5	Tagged Unions
6	Packed Structs
7	Data Layout
8	Exercises

Writes › Book › Learn › Learn Zig › Chapter 7. Struct Declarations ›

Struct Declarations

A struct is a type made from named fields.

Writes › Book › Learn › Learn Zig › Chapter 7. Struct Declarations ›

Field Access

Fields are selected with the dot operator.

Writes › Book › Learn › Learn Zig › Chapter 7. Struct Declarations ›

Methods as Functions

Zig has no class syntax.

Writes › Book › Learn › Learn Zig › Chapter 7. Struct Declarations ›

Enums

An enum is a type whose values come from a fixed set of names.

Writes › Book › Learn › Learn Zig › Chapter 7. Struct Declarations ›

Tagged Unions

A union is a value that may hold one of several types.

Writes › Book › Learn › Learn Zig › Chapter 7. Struct Declarations ›

Packed Structs

A normal struct is laid out for ordinary program use. The compiler may add padding between fields so that each field has a suitable address.

Writes › Book › Learn › Learn Zig › Chapter 7. Struct Declarations ›

Data Layout

A struct is not only a list of fields. It also has a layout in memory.

Writes › Book › Learn › Learn Zig › Chapter 7. Struct Declarations ›

Exercises

These exercises close the chapter on structs, enums, and unions. They are meant to make the data model concrete.