func MatchHeaders(b reflect.Type, slice interface{}, header reflect.SliceHeader) (e error) {
h, s, al := SliceHeader(slice)
switch {
case s != int(b.Size()):
e = HeaderMismatch{"%v: slice element size should be %v not %v", b.Name(), b.Size(), s}
case al != b.Align():
e = HeaderMismatch{"%v: slice element alignment should be %v not %v", b.Name(), b.Align(), al}
case h.Data != header.Data:
e = HeaderMismatch{"%v: slice headers should point to the same memory: %v - %v", b.Name(), h.Data, header.Data}
case h.Len != header.Len:
e = HeaderMismatch{"%v: slice header lengths should be the same: %v - %v", b.Name(), h.Len, header.Len}
case h.Cap != header.Cap:
e = HeaderMismatch{"%v: slice header capacities should be the same: %v - %v", b.Name(), h.Cap, header.Cap}
}
return
}