Initial commit: Go 1.23 release state

test/sliceopt.go

@@ -0,0 +1,32 @@
+// errorcheck -0 -d=append,slice
+
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Check optimization results for append and slicing.
+
+package main
+
+func a1(x []int, y int) []int {
+	x = append(x, y) // ERROR "append: len-only update \(in local slice\)$"
+	return x
+}
+
+func a2(x []int, y int) []int {
+	return append(x, y)
+}
+
+func a3(x *[]int, y int) {
+	*x = append(*x, y) // ERROR "append: len-only update$"
+}
+
+func s1(x **[]int, xs **string, i, j int) {
+	var z []int
+	z = (**x)[0:] // ERROR "slice: omit slice operation$"
+	println(z)
+
+	var zs string
+	zs = (**xs)[0:] // ERROR "slice: omit slice operation$"
+	println(zs)
+}