issue54765.go

     1  // errorcheck
     2  
     3  // Copyright 2022 The Go Authors. All rights reserved.
     4  // Use of this source code is governed by a BSD-style
     5  // license that can be found in the LICENSE file.
     6  
     7  // Test that not-in-heap types cannot be used as type
     8  // arguments. (pointer-to-nih types are okay though.)
     9  
    10  //go:build cgo
    11  
    12  package p
    13  
    14  import (
    15  	"runtime/cgo"
    16  	"sync/atomic"
    17  )
    18  
    19  var _ atomic.Pointer[cgo.Incomplete]  // ERROR "cannot use incomplete \(or unallocatable\) type as a type argument: runtime/cgo\.Incomplete"
    20  var _ atomic.Pointer[*cgo.Incomplete] // ok
    21  
    22  func implicit(ptr *cgo.Incomplete) {
    23  	g(ptr)  // ERROR "cannot use incomplete \(or unallocatable\) type as a type argument: runtime/cgo\.Incomplete"
    24  	g(&ptr) // ok
    25  }
    26  
    27  func g[T any](_ *T) {}
    28
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