From 6cdc6b667a8db2b63a4613c63dc4f75a34a5ea7f Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= Date: Mon, 13 Aug 2012 10:09:48 +0200 Subject: erl_lint: Add a deprecated warning for literal tuple funs The run-time warning for use of tuple funs will not catch the use of literal tuple funs, such as: if {erlang,'+'}(3,X) =:= 0 -> true; true -> false end. Therefore, add a compile-time warning to give users some warning before they stop working in R16. --- lib/stdlib/src/erl_lint.erl | 5 ++++- lib/stdlib/test/erl_lint_SUITE.erl | 25 ++++++++++++++----------- lib/stdlib/test/qlc_SUITE.erl | 8 +++++++- 3 files changed, 25 insertions(+), 13 deletions(-) diff --git a/lib/stdlib/src/erl_lint.erl b/lib/stdlib/src/erl_lint.erl index abab81d31f..648ff349a4 100644 --- a/lib/stdlib/src/erl_lint.erl +++ b/lib/stdlib/src/erl_lint.erl @@ -248,6 +248,8 @@ format_error({illegal_guard_local_call, {F,A}}) -> io_lib:format("call to local/imported function ~w/~w is illegal in guard", [F,A]); format_error(illegal_guard_expr) -> "illegal guard expression"; +format_error(deprecated_tuple_fun) -> + "tuple funs are deprecated and will be removed in R16"; %% --- exports --- format_error({explicit_export,F,A}) -> io_lib:format("in this release, the call to ~w/~w must be written " @@ -1914,7 +1916,8 @@ gexpr({call,Line,{remote,_Lr,{atom,_Lm,erlang},{atom,_Lf,F}},As}, Vt, St0) -> true -> {Asvt,St1}; false -> {Asvt,add_error(Line, illegal_guard_expr, St1)} end; -gexpr({call,L,{tuple,Lt,[{atom,Lm,erlang},{atom,Lf,F}]},As}, Vt, St) -> +gexpr({call,L,{tuple,Lt,[{atom,Lm,erlang},{atom,Lf,F}]},As}, Vt, St0) -> + St = add_warning(L, deprecated_tuple_fun, St0), gexpr({call,L,{remote,Lt,{atom,Lm,erlang},{atom,Lf,F}},As}, Vt, St); gexpr({op,Line,Op,A}, Vt, St0) -> {Avt,St1} = gexpr(A, Vt, St0), diff --git a/lib/stdlib/test/erl_lint_SUITE.erl b/lib/stdlib/test/erl_lint_SUITE.erl index dcd622b984..9f9d97b619 100644 --- a/lib/stdlib/test/erl_lint_SUITE.erl +++ b/lib/stdlib/test/erl_lint_SUITE.erl @@ -1331,17 +1331,20 @@ guard(Config) when is_list(Config) -> foo. ">>, [warn_unused_vars, nowarn_obsolete_guard], - {errors,[{2,erl_lint,illegal_guard_expr}, - {4,erl_lint,illegal_guard_expr}, - {6,erl_lint,illegal_guard_expr}, - {8,erl_lint,illegal_guard_expr}, - {10,erl_lint,illegal_guard_expr}, - {12,erl_lint,illegal_guard_expr}, - {14,erl_lint,illegal_guard_expr}, - {16,erl_lint,illegal_guard_expr}, - {18,erl_lint,illegal_guard_expr}, - {20,erl_lint,illegal_guard_expr}], - []}}, + {error,[{2,erl_lint,illegal_guard_expr}, + {4,erl_lint,illegal_guard_expr}, + {6,erl_lint,illegal_guard_expr}, + {8,erl_lint,illegal_guard_expr}, + {10,erl_lint,illegal_guard_expr}, + {12,erl_lint,illegal_guard_expr}, + {14,erl_lint,illegal_guard_expr}, + {16,erl_lint,illegal_guard_expr}, + {18,erl_lint,illegal_guard_expr}, + {20,erl_lint,illegal_guard_expr}], + [{8,erl_lint,deprecated_tuple_fun}, + {14,erl_lint,deprecated_tuple_fun}, + {20,erl_lint,deprecated_tuple_fun}, + {28,erl_lint,deprecated_tuple_fun}]}}, {guard6, <<"-record(apa,{a=a,b=foo:bar()}). apa() -> diff --git a/lib/stdlib/test/qlc_SUITE.erl b/lib/stdlib/test/qlc_SUITE.erl index 1e74ad7727..192268f90e 100644 --- a/lib/stdlib/test/qlc_SUITE.erl +++ b/lib/stdlib/test/qlc_SUITE.erl @@ -2969,12 +2969,14 @@ lookup1(Config) when is_list(Config) -> [3] = lookup_keys(Q) end, [{1,a},{3,3}])">>, + {cres, <<"A = 3, etsc(fun(E) -> Q = qlc:q([X || X <- ets:table(E), A =:= {erlang,element}(1, X)]), [{3,3}] = qlc:e(Q), [3] = lookup_keys(Q) end, [{1,a},{3,3}])">>, + {warnings,[{3,erl_lint,deprecated_tuple_fun}]}}, <<"etsc(fun(E) -> A = 3, @@ -3439,12 +3441,14 @@ lookup2(Config) when is_list(Config) -> [r] = qlc:e(Q), [r] = lookup_keys(Q) end, [{keypos,1}], [#r{}])">>, + {cres, <<"etsc(fun(E) -> Q = qlc:q([element(1, X) || X <- ets:table(E), {erlang,is_record}(X, r, 2)]), [r] = qlc:e(Q), [r] = lookup_keys(Q) end, [{keypos,1}], [#r{}])">>, + {warnings,[{4,erl_lint,deprecated_tuple_fun}]}}, {cres, <<"etsc(fun(E) -> Q = qlc:q([element(1, X) || X <- ets:table(E), @@ -3465,12 +3469,14 @@ lookup2(Config) when is_list(Config) -> [r] = qlc:e(Q), [r] = lookup_keys(Q) end, [{keypos,1}], [#r{}])">>, + {cres, <<"etsc(fun(E) -> Q = qlc:q([element(1, X) || X <- ets:table(E), {erlang,is_record}(X, r)]), [r] = qlc:e(Q), [r] = lookup_keys(Q) - end, [{keypos,1}], [#r{}])">> + end, [{keypos,1}], [#r{}])">>, + {warnings,[{4,erl_lint,deprecated_tuple_fun}]}} ], ?line run(Config, <<"-record(r, {a}).\n">>, TsR), -- cgit v1.2.3