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Go Generics in 2026: What Finally Works and What Still Doesn't

DEV Community·Gabriel Anhaia·6 months ago
#DUx1LWso
#go#programming#generics#func#type
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Book: The Complete Guide to Go Programming

Also by me: Thinking in Go (2-book series) — Complete Guide to Go Programming + Hexagonal Architecture in Go

My project: Hermes IDE | GitHub — an IDE for developers who ship with Claude Code and other AI coding tools

Me: xgabriel.com | GitHub

An engineer I know spent two days arguing with their team about a single type parameter. The function was a four-line Map over a slice. Half the team wanted to keep it generic, the other half wanted to write three concrete versions. Both sides cited "Go 1.18 generics" as if the language had not moved since 2022.

It has moved a lot. Type inference widened across 1.21 and the releases that followed, and the call-site noise mostly went away. The 1.21 stdlib added slices , maps , and cmp.Ordered , which collapsed most of the boilerplate problem into a one-liner.…

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