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Test variance switching for bivariant records

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This commit is contained in:
Gaith Hallak 2022-05-24 22:16:34 +04:00
parent 08d0c7034f
commit e5c6efc8ae
2 changed files with 13 additions and 5 deletions
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10
test/aeso_compiler_tests.erl
View File

@ -991,19 +991,19 @@ failing_contracts() ->
"when checking the type of the expression `TK(f_a_to_c_to_u) : tk(Animal, Cat)` against the expected type `tk(Cat, Cat)`">>
])
, ?TYPE_ERROR(polymorphism_variance_switching_records,
[<<?Pos(26,13)
[<<?Pos(27,13)
"Cannot unify `Animal` and `Cat` in a covariant context\n"
"when checking the type of the pattern `r03 : rec_a(Cat)` against the expected type `Main.rec_a(Animal)`">>,
<<?Pos(32,13)
<<?Pos(33,13)
"Cannot unify `Cat` and `Animal` in a contravariant context\n"
"when checking the type of the pattern `r06 : rec_b(Animal)` against the expected type `Main.rec_b(Cat)`">>,
<<?Pos(40,13)
<<?Pos(41,13)
"Cannot unify `Animal` and `Cat` in a covariant context\n"
"when checking the type of the pattern `r11 : rec_c(Cat)` against the expected type `Main.rec_c(Animal)`">>,
<<?Pos(46,13)
<<?Pos(47,13)
"Cannot unify `Cat` and `Animal` in a invariant context\n"
"when checking the type of the pattern `r16 : rec_d(Animal)` against the expected type `Main.rec_d(Cat)`">>,
<<?Pos(47,13)
<<?Pos(48,13)
"Cannot unify `Animal` and `Cat` in a invariant context\n"
"when checking the type of the pattern `r17 : rec_d(Cat)` against the expected type `Main.rec_d(Animal)`">>])
, ?TYPE_ERROR(polymorphism_variance_switching_oracles,

8
test/contracts/polymorphism_variance_switching_records.aes
View File

@ -10,6 +10,7 @@ main contract Main =
record rec_c('a) = { x : () => 'a}
record rec_d('a) = { x : 'a => unit,
y : () => 'a }
record rec_e('a) = { x : int }
stateful entrypoint new_cat() : Cat = Chain.create()
stateful entrypoint new_animal() : Animal = new_cat()
@ -47,4 +48,11 @@ main contract Main =
let r17 : rec_d(Cat) = rxaya // fail
let r20 : rec_d(Cat) = rxcyc // success
let rba : rec_e(Animal) = { x = 1 }
let rbc : rec_e(Cat) = { x = 1 }
let r21 : rec_e(Animal) = rba // success
let r21 : rec_e(Animal) = rbc // success
let r22 : rec_e(Cat) = rba // success
let r22 : rec_e(Cat) = rbc // success
()