diff options
Diffstat (limited to 'lib/dialyzer/src/dialyzer_contracts.erl')
| -rw-r--r-- | lib/dialyzer/src/dialyzer_contracts.erl | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/lib/dialyzer/src/dialyzer_contracts.erl b/lib/dialyzer/src/dialyzer_contracts.erl index 0b932d5a1f..332a326b0d 100644 --- a/lib/dialyzer/src/dialyzer_contracts.erl +++ b/lib/dialyzer/src/dialyzer_contracts.erl @@ -2,7 +2,7 @@ %%----------------------------------------------------------------------- %% %CopyrightBegin% %% -%% Copyright Ericsson AB 2007-2012. All Rights Reserved. +%% Copyright Ericsson AB 2007-2013. All Rights Reserved. %% %% The contents of this file are subject to the Erlang Public License, %% Version 1.1, (the "License"); you may not use this file except in @@ -254,14 +254,35 @@ check_extraneous([C|Cs], SuccType) -> end. check_extraneous_1(Contract, SuccType) -> - CRngs = erl_types:t_elements(erl_types:t_fun_range(Contract)), + CRng = erl_types:t_fun_range(Contract), + CRngs = erl_types:t_elements(CRng), STRng = erl_types:t_fun_range(SuccType), ?debug("CR = ~p\nSR = ~p\n", [CRngs, STRng]), - case [CR || CR <- CRngs, erl_types:t_is_none(erl_types:t_inf(CR, STRng, opaque))] of - [] -> ok; + case [CR || CR <- CRngs, + erl_types:t_is_none(erl_types:t_inf(CR, STRng, opaque))] 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, opaque), + case erl_types:t_is_none(Inf) of + true -> {error, invalid_contract}; + false -> ok + end + end; CRs -> {error, {extra_range, erl_types:t_sup(CRs), STRng}} end. +list_part(Type) -> + erl_types:t_inf(erl_types:t_list(), Type, opaque). + +is_not_nil_list(Type) -> + erl_types:t_is_list(Type) andalso not erl_types:t_is_nil(Type). + %% This is the heart of the "range function" -spec process_contracts([contract_pair()], [erl_types:erl_type()]) -> erl_types:erl_type(). @@ -499,6 +520,8 @@ get_invalid_contract_warnings_funs([{MFA, {FileLine, Contract}}|Left], case check_contract(Contract, Sig) of {error, invalid_contract} -> [invalid_contract_warning(MFA, FileLine, Sig, RecDict)|Acc]; + {error, {overlapping_contract, []}} -> + [overlapping_contract_warning(MFA, FileLine)|Acc]; {error, {extra_range, ExtraRanges, STRange}} -> Warn = case t_from_forms_without_remote(Contract#contract.forms, @@ -550,6 +573,9 @@ invalid_contract_warning({M, F, A}, FileLine, SuccType, RecDict) -> SuccTypeStr = dialyzer_utils:format_sig(SuccType, RecDict), {?WARN_CONTRACT_TYPES, FileLine, {invalid_contract, [M, F, A, SuccTypeStr]}}. +overlapping_contract_warning({M, F, A}, FileLine) -> + {?WARN_CONTRACT_TYPES, FileLine, {overlapping_contract, [M, F, A]}}. + extra_range_warning({M, F, A}, FileLine, ExtraRanges, STRange) -> ERangesStr = erl_types:t_to_string(ExtraRanges), STRangeStr = erl_types:t_to_string(STRange), |