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by joahnn_s 274 days ago
Who's actually expecting `xyz.com` here?

Spec: https://go.dev/ref/spec#Selectors > x.f resolves to the field/method at the shallowest depth in T. If there isn’t exactly one at that depth, it’s illegal.

Embedding promotes fields; on name collisions the shallowest wins. So `opts.URL` is `FooService.URL` (depth 1), not `BarConnectionOptions.URL` (depth 2).
1 comments
Someone 273 days ago
That something is clearly specced doesn’t imply all developers actively know it.

Even given that it compiles, I wouldn’t exclude it being a runtime error.

But the big problem isn’t that it behaves as advertised, it’s that it is way too easy to write opts.URL where you mean opts.Bar.URL. Auto-complete will happily compete the wrong thing for you.

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