diff options
Diffstat (limited to 'tests/ui/regions/region-lifetime-bounds-on-fns-where-clause.rs')
-rw-r--r-- | tests/ui/regions/region-lifetime-bounds-on-fns-where-clause.rs | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/tests/ui/regions/region-lifetime-bounds-on-fns-where-clause.rs b/tests/ui/regions/region-lifetime-bounds-on-fns-where-clause.rs new file mode 100644 index 000000000..d364c4677 --- /dev/null +++ b/tests/ui/regions/region-lifetime-bounds-on-fns-where-clause.rs @@ -0,0 +1,30 @@ +fn a<'a, 'b>(x: &mut &'a isize, y: &mut &'b isize) where 'b: 'a { + // Note: this is legal because of the `'b:'a` declaration. + *x = *y; +} + +fn b<'a, 'b>(x: &mut &'a isize, y: &mut &'b isize) { + // Illegal now because there is no `'b:'a` declaration. + *x = *y; +} + +fn c<'a,'b>(x: &mut &'a isize, y: &mut &'b isize) { + // Here we try to call `foo` but do not know that `'a` and `'b` are + // related as required. + a(x, y); +} + +fn d() { + // 'a and 'b are early bound in the function `a` because they appear + // inconstraints: + let _: fn(&mut &isize, &mut &isize) = a; + //~^ ERROR mismatched types [E0308] +} + +fn e() { + // 'a and 'b are late bound in the function `b` because there are + // no constraints: + let _: fn(&mut &isize, &mut &isize) = b; +} + +fn main() { } |