internal/testdata/fixtures/posts/with-code.md

0.5 KB · 22 lines · 2024-07-04 · c8f5b2e

---
title: Using errors.Is in Go
date: 2024-07-04
tags: [go, errors]
---

I learned today that `errors.Is` unwraps wrapped errors automatically.

    package main

    import (
        "errors"
        "fmt"
    )

    func main() {
        a := errors.New("boom")
        b := fmt.Errorf("wrapped: %w", a)
        fmt.Println(errors.Is(b, a))
    }

That prints `true`.