src/test/ui/variance/variance-btree-invariant-types.rs

   1 use std::collections::btree_map::{IterMut, OccupiedEntry, RangeMut, VacantEntry};
   2
   3 fn iter_cov_key<'a, 'new>(v: IterMut<'a, &'static (), ()>) -> IterMut<'a, &'new (), ()> {
   4     v //~ ERROR mismatched types
   5 }
   6 fn iter_cov_val<'a, 'new>(v: IterMut<'a, (), &'static ()>) -> IterMut<'a, (), &'new ()> {
   7     v //~ ERROR mismatched types
   8 }
   9 fn iter_contra_key<'a, 'new>(v: IterMut<'a, &'new (), ()>) -> IterMut<'a, &'static (), ()> {
  10     v //~ ERROR mismatched types
  11 }
  12 fn iter_contra_val<'a, 'new>(v: IterMut<'a, (), &'new ()>) -> IterMut<'a, (), &'static ()> {
  13     v //~ ERROR mismatched types
  14 }
  15
  16 fn range_cov_key<'a, 'new>(v: RangeMut<'a, &'static (), ()>) -> RangeMut<'a, &'new (), ()> {
  17     v //~ ERROR mismatched types
  18 }
  19 fn range_cov_val<'a, 'new>(v: RangeMut<'a, (), &'static ()>) -> RangeMut<'a, (), &'new ()> {
  20     v //~ ERROR mismatched types
  21 }
  22 fn range_contra_key<'a, 'new>(v: RangeMut<'a, &'new (), ()>) -> RangeMut<'a, &'static (), ()> {
  23     v //~ ERROR mismatched types
  24 }
  25 fn range_contra_val<'a, 'new>(v: RangeMut<'a, (), &'new ()>) -> RangeMut<'a, (), &'static ()> {
  26     v //~ ERROR mismatched types
  27 }
  28
  29 fn occ_cov_key<'a, 'new>(v: OccupiedEntry<'a, &'static (), ()>)
  30                          -> OccupiedEntry<'a, &'new (), ()> {
  31     v //~ ERROR mismatched types
  32 }
  33 fn occ_cov_val<'a, 'new>(v: OccupiedEntry<'a, (), &'static ()>)
  34                          -> OccupiedEntry<'a, (), &'new ()> {
  35     v //~ ERROR mismatched types
  36 }
  37 fn occ_contra_key<'a, 'new>(v: OccupiedEntry<'a, &'new (), ()>)
  38                             -> OccupiedEntry<'a, &'static (), ()> {
  39     v //~ ERROR mismatched types
  40 }
  41 fn occ_contra_val<'a, 'new>(v: OccupiedEntry<'a, (), &'new ()>)
  42                             -> OccupiedEntry<'a, (), &'static ()> {
  43     v //~ ERROR mismatched types
  44 }
  45
  46 fn vac_cov_key<'a, 'new>(v: VacantEntry<'a, &'static (), ()>)
  47                          -> VacantEntry<'a, &'new (), ()> {
  48     v //~ ERROR mismatched types
  49 }
  50 fn vac_cov_val<'a, 'new>(v: VacantEntry<'a, (), &'static ()>)
  51                          -> VacantEntry<'a, (), &'new ()> {
  52     v //~ ERROR mismatched types
  53 }
  54 fn vac_contra_key<'a, 'new>(v: VacantEntry<'a, &'new (), ()>)
  55                             -> VacantEntry<'a, &'static (), ()> {
  56     v //~ ERROR mismatched types
  57 }
  58 fn vac_contra_val<'a, 'new>(v: VacantEntry<'a, (), &'new ()>)
  59                             -> VacantEntry<'a, (), &'static ()> {
  60     v //~ ERROR mismatched types
  61 }
  62
  63
  64 fn main() { }