From 25ab719cfaf42d196287fec2171bf3eefb845b62 Mon Sep 17 00:00:00 2001 From: Hans Bolinder Date: Wed, 30 Apr 2014 09:11:34 +0200 Subject: dialyzer: Introduce module local suppression of warnings The -dialyzer() attribute can be used for suppressing warnings in a module by specifying functions or warning options. It can also be used for requesting warnings in a module. --- .../results/blame_contract_range_suppressed | 2 + .../test/small_SUITE_data/results/request1 | 2 + .../test/small_SUITE_data/results/suppress_request | 6 +++ .../src/blame_contract_range_suppressed.erl | 15 +++++++ .../test/small_SUITE_data/src/request1.erl | 12 ++++++ .../test/small_SUITE_data/src/suppress_request.erl | 50 ++++++++++++++++++++++ .../test/small_SUITE_data/src/suppression1.erl | 33 ++++++++++++++ .../test/small_SUITE_data/src/suppression2.erl | 32 ++++++++++++++ 8 files changed, 152 insertions(+) create mode 100644 lib/dialyzer/test/small_SUITE_data/results/blame_contract_range_suppressed create mode 100644 lib/dialyzer/test/small_SUITE_data/results/request1 create mode 100644 lib/dialyzer/test/small_SUITE_data/results/suppress_request create mode 100644 lib/dialyzer/test/small_SUITE_data/src/blame_contract_range_suppressed.erl create mode 100644 lib/dialyzer/test/small_SUITE_data/src/request1.erl create mode 100644 lib/dialyzer/test/small_SUITE_data/src/suppress_request.erl create mode 100644 lib/dialyzer/test/small_SUITE_data/src/suppression1.erl create mode 100644 lib/dialyzer/test/small_SUITE_data/src/suppression2.erl (limited to 'lib/dialyzer/test/small_SUITE_data') diff --git a/lib/dialyzer/test/small_SUITE_data/results/blame_contract_range_suppressed b/lib/dialyzer/test/small_SUITE_data/results/blame_contract_range_suppressed new file mode 100644 index 0000000000..40733434f6 --- /dev/null +++ b/lib/dialyzer/test/small_SUITE_data/results/blame_contract_range_suppressed @@ -0,0 +1,2 @@ + +blame_contract_range_suppressed.erl:8: Function foo/0 has no local return diff --git a/lib/dialyzer/test/small_SUITE_data/results/request1 b/lib/dialyzer/test/small_SUITE_data/results/request1 new file mode 100644 index 0000000000..0cf4017403 --- /dev/null +++ b/lib/dialyzer/test/small_SUITE_data/results/request1 @@ -0,0 +1,2 @@ + +request1.erl:8: Expression produces a value of type {'a','b'}, but this value is unmatched diff --git a/lib/dialyzer/test/small_SUITE_data/results/suppress_request b/lib/dialyzer/test/small_SUITE_data/results/suppress_request new file mode 100644 index 0000000000..18e82b7972 --- /dev/null +++ b/lib/dialyzer/test/small_SUITE_data/results/suppress_request @@ -0,0 +1,6 @@ + +suppress_request.erl:21: Expression produces a value of type {'a','b'}, but this value is unmatched +suppress_request.erl:25: Expression produces a value of type {'a','b'}, but this value is unmatched +suppress_request.erl:35: Function test3_b/0 has no local return +suppress_request.erl:39: Guard test 2 =:= A::fun((none()) -> no_return()) can never succeed +suppress_request.erl:7: Type specification suppress_request:test1('a' | 'b') -> 'ok' is a subtype of the success typing: suppress_request:test1('a' | 'b' | 'c') -> 'ok' diff --git a/lib/dialyzer/test/small_SUITE_data/src/blame_contract_range_suppressed.erl b/lib/dialyzer/test/small_SUITE_data/src/blame_contract_range_suppressed.erl new file mode 100644 index 0000000000..8b66d35083 --- /dev/null +++ b/lib/dialyzer/test/small_SUITE_data/src/blame_contract_range_suppressed.erl @@ -0,0 +1,15 @@ +%%----------------------------------------------------------------------- +%% Like ./blame_contract_range.erl, but warning is suppressed. +%%----------------------------------------------------------------------- +-module(blame_contract_range_suppressed). + +-export([foo/0]). + +foo() -> + bar(b). + +-dialyzer({nowarn_function, bar/1}). + +-spec bar(atom()) -> a. +bar(a) -> a; +bar(b) -> b. diff --git a/lib/dialyzer/test/small_SUITE_data/src/request1.erl b/lib/dialyzer/test/small_SUITE_data/src/request1.erl new file mode 100644 index 0000000000..a6c4ab8dbd --- /dev/null +++ b/lib/dialyzer/test/small_SUITE_data/src/request1.erl @@ -0,0 +1,12 @@ +-module(request1). + +-export([a/0]). + +-dialyzer(unmatched_returns). + +a() -> + b(), + 1. + +b() -> + {a, b}. diff --git a/lib/dialyzer/test/small_SUITE_data/src/suppress_request.erl b/lib/dialyzer/test/small_SUITE_data/src/suppress_request.erl new file mode 100644 index 0000000000..c4275fa110 --- /dev/null +++ b/lib/dialyzer/test/small_SUITE_data/src/suppress_request.erl @@ -0,0 +1,50 @@ +-module(suppress_request). + +-export([test1/1, test1_b/1, test2/0, test2_b/0, + test3/0, test3_b/0, test4/0, test4_b/0]). + +-dialyzer({[specdiffs], test1/1}). +-spec test1(a | b) -> ok. % spec is subtype +test1(A) -> + ok = test1_1(A). + +-spec test1_b(a | b) -> ok. % spec is subtype (suppressed by default) +test1_b(A) -> + ok = test1_1(A). + +-spec test1_1(a | b | c) -> ok. +test1_1(_) -> + ok. + +-dialyzer(unmatched_returns). +test2() -> + tuple(), % unmatched + ok. + +test2_b() -> + tuple(), % unmatched + ok. + +-dialyzer({[no_return, no_match], [test3/0]}). +test3() -> % no local return (suppressed) + A = fun(_) -> + 1 + end, + A = 2. % can never succeed (suppressed) + +test3_b() -> % no local return (requested by default) + A = fun(_) -> + 1 + end, + A = 2. % can never succeed (requested by default) + +-dialyzer(no_improper_lists). +test4() -> + [1 | 2]. % improper list (suppressed) + +-dialyzer({no_improper_lists, test4_b/0}). +test4_b() -> + [1 | 2]. % improper list (suppressed) + +tuple() -> + {a, b}. diff --git a/lib/dialyzer/test/small_SUITE_data/src/suppression1.erl b/lib/dialyzer/test/small_SUITE_data/src/suppression1.erl new file mode 100644 index 0000000000..00534704c3 --- /dev/null +++ b/lib/dialyzer/test/small_SUITE_data/src/suppression1.erl @@ -0,0 +1,33 @@ +-module(suppression1). + +-export([a/1, b/1, c/0]). + +-dialyzer({nowarn_function, a/1}). + +-spec a(_) -> integer(). + +a(_) -> + A = fun(_) -> + B = fun(_) -> + x = 7 + end, + B = 1 + end, + A. + +-spec b(_) -> integer(). + +-dialyzer({nowarn_function, b/1}). + +b(_) -> + A = fun(_) -> + 1 + end, + A = 2. + +-record(r, {a = a :: integer()}). + +-dialyzer({nowarn_function, c/0}). + +c() -> + #r{}. diff --git a/lib/dialyzer/test/small_SUITE_data/src/suppression2.erl b/lib/dialyzer/test/small_SUITE_data/src/suppression2.erl new file mode 100644 index 0000000000..4cba53fdce --- /dev/null +++ b/lib/dialyzer/test/small_SUITE_data/src/suppression2.erl @@ -0,0 +1,32 @@ +-module(suppression2). + +-export([a/1, b/1, c/0]). + +-dialyzer({nowarn_function, [a/1, b/1, c/0]}). +-dialyzer([no_undefined_callbacks]). + +-behaviour(not_a_behaviour). + +-spec a(_) -> integer(). + +a(_) -> + A = fun(_) -> + B = fun(_) -> + x = 7 + end, + B = 1 + end, + A. + +-spec b(_) -> integer(). + +b(_) -> + A = fun(_) -> + 1 + end, + A = 2. + +-record(r, {a = a :: integer()}). + +c() -> + #r{}. -- cgit v1.2.3