mirror of https://github.com/tailscale/tailscale/
util/cmpx: delete now that we're using Go 1.22
Updates #11058 Change-Id: I09dea8e86f03ec148b715efca339eab8b1f0f644 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>pull/11066/head
Brad Fitzpatrick
3 months ago
committed by
Brad Fitzpatrick
parent
5ea071186e
commit
2bd3c1474b
@ -1,22 +0,0 @@
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// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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// Package cmpx has code that will likely land in a future version of Go, but
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// we want sooner.
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package cmpx
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// Or returns the first non-zero element of list, or else returns the zero T.
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//
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// This is the proposal from
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// https://github.com/golang/go/issues/60204#issuecomment-1581245334.
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func Or[T comparable](list ...T) T {
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// TODO(bradfitz): remove the comparable constraint so we can use this
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// with funcs too and use reflect to see whether they're non-zero? 🤷♂️
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var zero T
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for _, v := range list {
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if v != zero {
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return v
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}
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}
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return zero
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}
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@ -1,24 +0,0 @@
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// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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package cmpx
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import "testing"
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func TestOr(t *testing.T) {
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if g, w := Or[string](), ""; g != w {
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t.Errorf("got %v; want %v", g, w)
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}
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if g, w := Or[int](), 0; g != w {
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t.Errorf("got %v; want %v", g, w)
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}
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if g, w := Or("", "foo", "bar"), "foo"; g != w {
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t.Errorf("got %v; want %v", g, w)
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}
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if g, w := Or("foo", "bar"), "foo"; g != w {
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t.Errorf("got %v; want %v", g, w)
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}
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if g, w := Or("", "", "bar"), "bar"; g != w {
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t.Errorf("got %v; want %v", g, w)
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}
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}
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