The Underscore Field in Go Structs: Beyond Enforcing Named Initialization

Thu, 30 Jul 2026 09:00:00 -0500

Introduction

The underscore character (_) in Go serves several well-known purposes: ignoring unwanted return values, importing packages solely for their side effects, and as a blank identifier in various contexts. However, there’s a lesser-known use case: adding an underscore field to a struct. This pattern deserves closer examination as it offers more benefits than simply enforcing named initialization.

Understanding the Underscore Field Pattern

Let’s start by examining the pattern in question:

Struct Design on Support Tools

The Underscore Field in Go Structs: Beyond Enforcing Named Initialization

Introduction

Understanding the Underscore Field Pattern