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-rw-r--r--lib/dialyzer/src/dialyzer_contracts.erl41
1 files changed, 29 insertions, 12 deletions
diff --git a/lib/dialyzer/src/dialyzer_contracts.erl b/lib/dialyzer/src/dialyzer_contracts.erl
index e03e4d5bb4..1895a98e96 100644
--- a/lib/dialyzer/src/dialyzer_contracts.erl
+++ b/lib/dialyzer/src/dialyzer_contracts.erl
@@ -277,28 +277,45 @@ check_extraneous_1(Contract, SuccType) ->
case [CR || CR <- CRngs,
erl_types:t_is_none(erl_types:t_inf(CR, STRng))] of
[] ->
- CRngList = list_part(CRng),
- STRngList = list_part(STRng),
- case is_not_nil_list(CRngList) andalso is_not_nil_list(STRngList) of
- false -> ok;
- true ->
- CRngElements = erl_types:t_list_elements(CRngList),
- STRngElements = erl_types:t_list_elements(STRngList),
- Inf = erl_types:t_inf(CRngElements, STRngElements),
- case erl_types:t_is_none(Inf) of
- true -> {error, invalid_contract};
- false -> ok
- end
+ case bad_extraneous_list(CRng, STRng)
+ orelse bad_extraneous_map(CRng, STRng)
+ of
+ true -> {error, invalid_contract};
+ false -> ok
end;
CRs -> {error, {extra_range, erl_types:t_sup(CRs), STRng}}
end.
+bad_extraneous_list(CRng, STRng) ->
+ CRngList = list_part(CRng),
+ STRngList = list_part(STRng),
+ case is_not_nil_list(CRngList) andalso is_not_nil_list(STRngList) of
+ false -> false;
+ true ->
+ CRngElements = erl_types:t_list_elements(CRngList),
+ STRngElements = erl_types:t_list_elements(STRngList),
+ Inf = erl_types:t_inf(CRngElements, STRngElements),
+ erl_types:t_is_none(Inf)
+ end.
+
list_part(Type) ->
erl_types:t_inf(erl_types:t_list(), Type).
is_not_nil_list(Type) ->
erl_types:t_is_list(Type) andalso not erl_types:t_is_nil(Type).
+bad_extraneous_map(CRng, STRng) ->
+ CRngMap = map_part(CRng),
+ STRngMap = map_part(STRng),
+ (not is_empty_map(CRngMap)) andalso (not is_empty_map(STRngMap))
+ andalso is_empty_map(erl_types:t_inf(CRngMap, STRngMap)).
+
+map_part(Type) ->
+ erl_types:t_inf(erl_types:t_map(), Type).
+
+is_empty_map(Type) ->
+ erl_types:t_is_equal(Type, erl_types:t_from_term(#{})).
+
%% This is the heart of the "range function"
-spec process_contracts([contract_pair()], [erl_types:erl_type()]) ->
erl_types:erl_type().