types/bool: add Int (#14984)

Add Int which converts a bool into an integer.

Updates tailscale/corp#22024

Signed-off-by: Joe Tsai <joetsai@digital-static.net>

types/bools/bools.go

@@ -1,9 +1,18 @@
 // Copyright (c) Tailscale Inc & AUTHORS
 // SPDX-License-Identifier: BSD-3-Clause
 
-// Package bools contains the [Compare] and [Select] functions.
+// Package bools contains the [Int], [Compare], and [Select] functions.
 package bools
 
+// Int returns 1 for true and 0 for false.
+func Int(v bool) int {
+	if v {
+		return 1
+	} else {
+		return 0
+	}
+}
+
 // Compare compares two boolean values as if false is ordered before true.
 func Compare[T ~bool](x, y T) int {
 	switch {

types/bools/bools_test.go

@@ -5,6 +5,15 @@ package bools
 
 import "testing"
 
+func TestInt(t *testing.T) {
+	if got := Int(true); got != 1 {
+		t.Errorf("Int(true) = %v, want 1", got)
+	}
+	if got := Int(false); got != 0 {
+		t.Errorf("Int(false) = %v, want 0", got)
+	}
+}
+
 func TestCompare(t *testing.T) {
 	if got := Compare(false, false); got != 0 {
 		t.Errorf("Compare(false, false) = %v, want 0", got)