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Default to invariant when the variance of the type vars is unknown

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This commit is contained in:
Gaith Hallak 2022-05-25 18:46:53 +04:00
parent 8d419bc54f
commit 9e3f42db2c
1 changed files with 2 additions and 1 deletions
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3
src/aeso_ast_infer_types.erl
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@ -815,6 +815,7 @@ infer(Contracts, Options) ->
%% Set the variance for builtin types
ets_insert(type_vars_variance, {"list", [covariant]}),
ets_insert(type_vars_variance, {"option", [covariant]}),
ets_insert(type_vars_variance, {"map", [covariant, covariant]}),
ets_insert(type_vars_variance, {"oracle", [contravariant, covariant]}),
ets_insert(type_vars_variance, {"oracle_query", [covariant, covariant]}),
@ -2777,7 +2778,7 @@ unify1(Env, {app_t, _, {Tag, _, F}, Args1}, {app_t, _, {Tag, _, F}, Args2}, Vari
invariant -> invariant;
_ -> Vs
end;
_ -> Variance
_ -> invariant
end,
unify1(Env, Args1, Args2, Variances, When);
unify1(Env, {tuple_t, _, As}, {tuple_t, _, Bs}, Variance, When)