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authorBjörn Gustavsson <[email protected]>2012-08-13 10:09:48 +0200
committerBjörn Gustavsson <[email protected]>2012-08-15 10:54:52 +0200
commit6cdc6b667a8db2b63a4613c63dc4f75a34a5ea7f (patch)
tree506c68241e387fe5b569f5a1fcad85e416fee317 /lib
parentee5fdd50040894b27fd3fe9e767eab3821666e9a (diff)
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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.
Diffstat (limited to 'lib')
-rw-r--r--lib/stdlib/src/erl_lint.erl5
-rw-r--r--lib/stdlib/test/erl_lint_SUITE.erl25
-rw-r--r--lib/stdlib/test/qlc_SUITE.erl8
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),