go/test/newexpr.go

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// run
// Copyright 2025 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.
package main
// Issue #45624 is the proposal to accept new(expr) in go1.26.
// Here we test its run-time behavior.
func main() {
{
p := new(123) // untyped constant expr
if *p != 123 {
panic("wrong value")
}
}
{
x := 42
p := new(x) // non-constant expr
if *p != x {
panic("wrong value")
}
}
{
x := [2]int{123, 456}
p := new(x) // composite value
if *p != x {
panic("wrong value")
}
}
}