Zig Patterns

A list of links to code references showing common patterns in Zig.

Goals

• This document lives! Please make frequent updates.
• Beware of bitrot! Look at the date of the entry and/or the version of zig referenced
• Context Matters! Links to working code examples, for example the zig standard library, are preferred
• Inclusive over canonical! Prefer showing different approaches side-by-side instead of annoiting a "best" approach.

Patterns

Arena Allocator

• 0.13.0/lib/std/heap/arena_allocator.zig#L8

Closure

• 0.13.0/zig/lib/std/Thread/Pool.zig#L93

Comptime String Interning

• zig.news - Cool Zig Patterns - Comptime String Interning

Context

• 0.13.0/zig/lib/std/hash_map.zig#L128

Custom Type Format

• 0.13.0/lib/std/Uri.zig#L43

Default Argument Values

• 0.13.0/lib/std/fmt.zig#L23

Deferred Resource Deinitialization

*0.13.0/lib/std/once.zig#L31

Diagnostics

• zig.news - Applying the Diagnostics pattern in practice

Dynamic Dispatch (Fat Pointer)

• 0.13.0/lib/std/mem/Allocator.zig#L14

Error Deferred Resource Deinitialization

*0.13.0/lib/std/tz.zig#L92

Field Parent Pointer

• 0.13.0/lib/std/Thread/Futex.zig#L647

File Struct

• 0.13.0/lib/std/Thread.zig#L25

Generic Function

• 0.13.0/lib/std/mem.zig#L1188

Generic Type

• 0.13.0/lib/std/hash_map.zig#L360

Interfaces

• openmymind.net - Zig Interfaces
• zig-interface

Memory Pool - Fast Allocation

• Cool Zig Patterns - Gotta alloc fast

Static Dispatch (Tagged Union)

• zig.news - Easy Interfaces with Zig 0.10.0

Static Error Absence Guarantee

*0.13.0/lib/std/hash_map.zig#L1563

Struct of Arrays

• zig.news - Multi-Object For Loops + Struct-Of-Arrays

WaitGroup + ThreadPool

• 0.13.0/lib/compiler/build_runner.zig#L890

Web Request

• Zig.news - Easy web requests in Zig with Client.fetch

References

Many thanks to all the blog posts that served as references

• ziggit.dev - Zig Patterns
• zig.news - Cool Zig Patterns Series' Articles
• Mitchell Hashimoto - Zig

TODO

• Support Patterns links to blog posts with links to working code on github