Initial commit: Go 1.23 release state

test/copy1.go

@@ -0,0 +1,27 @@
+// errorcheck
+
+// Copyright 2017 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.
+
+// Verify that copy arguments requirements are enforced by the
+// compiler.
+
+package main
+
+func main() {
+
+	si := make([]int, 8)
+	sf := make([]float64, 8)
+
+	_ = copy()        // ERROR "not enough arguments"
+	_ = copy(1, 2, 3) // ERROR "too many arguments"
+
+	_ = copy(si, "hi") // ERROR "have different element types(.*int.*string| int and byte)"
+	_ = copy(si, sf)   // ERROR "have different element types.*int.*float64"
+
+	_ = copy(1, 2)  // ERROR "must be slices; have int, int|expects slice arguments"
+	_ = copy(1, si) // ERROR "first argument to copy should be|expects slice arguments"
+	_ = copy(si, 2) // ERROR "second argument to copy should be|expects slice arguments"
+
+}