github.com/segmentio/encoding@v0.4.0/json/reflect.go (about)

     1  //go:build go1.20
     2  // +build go1.20
     3  
     4  package json
     5  
     6  import (
     7  	"reflect"
     8  	"unsafe"
     9  )
    10  
    11  func extendSlice(t reflect.Type, s *slice, n int) slice {
    12  	arrayType := reflect.ArrayOf(n, t.Elem())
    13  	arrayData := reflect.New(arrayType)
    14  	reflect.Copy(arrayData.Elem(), reflect.NewAt(t, unsafe.Pointer(s)).Elem())
    15  	return slice{
    16  		data: unsafe.Pointer(arrayData.Pointer()),
    17  		len:  s.len,
    18  		cap:  n,
    19  	}
    20  }