1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
|
// Copyright 2016 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 reflectutil contains reflect utilities.
package reflectutil
import "reflect"
// hasPointers reports whether the given type contains any pointers,
// including any internal pointers in slices, funcs, maps, channels,
// etc.
//
// This function exists for Swapper's internal use, instead of reaching
// into the runtime's *reflect._rtype kind&kindNoPointers flag.
func hasPointers(t reflect.Type) bool {
if t == nil {
panic("nil Type")
}
k := t.Kind()
if k <= reflect.Complex128 {
return false
}
switch k {
default:
// chan, func, interface, map, ptr, slice, string, unsafepointer
// And anything else. It's safer to err on the side of true.
return true
case reflect.Array:
return hasPointers(t.Elem())
case reflect.Struct:
num := t.NumField()
for i := 0; i < num; i++ {
if hasPointers(t.Field(i).Type) {
return true
}
}
return false
}
}
|
