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| author | Anthony Ramine <[email protected]> | 2014-03-01 16:38:01 +0100 |
|---|---|---|
| committer | Anthony Ramine <[email protected]> | 2014-03-01 17:02:47 +0100 |
| commit | 66057b0e0c6e4a69b878090543604a7c2a59b34c (patch) | |
| tree | ba69bf5c675c981e26c03f340580962e1f203bd0 | |
| parent | db911c1f15372d2dadf06e8502506b0936a4fbb3 (diff) | |
| download | otp-66057b0e0c6e4a69b878090543604a7c2a59b34c.tar.gz otp-66057b0e0c6e4a69b878090543604a7c2a59b34c.tar.bz2 otp-66057b0e0c6e4a69b878090543604a7c2a59b34c.zip | |
Properly lint shortcircuiting operators
Shortcircuiting operators are not real functions and can't be used as
such with erlang:'andalso'(...) and erlang:'orelse'(...).
Reported-by: Ulf Norell
| -rw-r--r-- | lib/stdlib/src/erl_lint.erl | 10 | ||||
| -rw-r--r-- | lib/stdlib/test/erl_lint_SUITE.erl | 10 |
2 files changed, 17 insertions, 3 deletions
diff --git a/lib/stdlib/src/erl_lint.erl b/lib/stdlib/src/erl_lint.erl index 0c6f41f594..b077ce4d78 100644 --- a/lib/stdlib/src/erl_lint.erl +++ b/lib/stdlib/src/erl_lint.erl @@ -1851,6 +1851,10 @@ gexpr({op,Line,Op,A}, Vt, St0) -> true -> {Avt,St1}; false -> {Avt,add_error(Line, illegal_guard_expr, St1)} end; +gexpr({op,_,'andalso',L,R}, Vt, St) -> + gexpr_list([L,R], Vt, St); +gexpr({op,_,'orelse',L,R}, Vt, St) -> + gexpr_list([L,R], Vt, St); gexpr({op,Line,Op,L,R}, Vt, St0) -> {Avt,St1} = gexpr_list([L,R], Vt, St0), case is_gexpr_op(Op, 2) of @@ -1937,12 +1941,14 @@ is_gexpr({call,L,{tuple,Lt,[{atom,Lm,erlang},{atom,Lf,F}]},As}, RDs) -> is_gexpr({call,L,{remote,Lt,{atom,Lm,erlang},{atom,Lf,F}},As}, RDs); is_gexpr({op,_L,Op,A}, RDs) -> is_gexpr_op(Op, 1) andalso is_gexpr(A, RDs); +is_gexpr({op,_L,'andalso',A1,A2}, RDs) -> + is_gexpr_list([A1,A2], RDs); +is_gexpr({op,_L,'orelse',A1,A2}, RDs) -> + is_gexpr_list([A1,A2], RDs); is_gexpr({op,_L,Op,A1,A2}, RDs) -> is_gexpr_op(Op, 2) andalso is_gexpr_list([A1,A2], RDs); is_gexpr(_Other, _RDs) -> false. -is_gexpr_op('andalso', 2) -> true; -is_gexpr_op('orelse', 2) -> true; is_gexpr_op(Op, A) -> try erl_internal:op_type(Op, A) of arith -> true; diff --git a/lib/stdlib/test/erl_lint_SUITE.erl b/lib/stdlib/test/erl_lint_SUITE.erl index 48f50d5f43..3143022572 100644 --- a/lib/stdlib/test/erl_lint_SUITE.erl +++ b/lib/stdlib/test/erl_lint_SUITE.erl @@ -1493,7 +1493,15 @@ guard(Config) when is_list(Config) -> [], {errors,[{1,erl_lint,illegal_guard_expr}, {2,erl_lint,illegal_guard_expr}, - {3,erl_lint,illegal_guard_expr}],[]}} + {3,erl_lint,illegal_guard_expr}],[]}}, + {guard9, + <<"t(X, Y) when erlang:'andalso'(X, Y) -> ok; + t(X, Y) when erlang:'orelse'(X, Y) -> ok. + ">>, + [], + {errors,[{1,erl_lint,illegal_guard_expr}, + {2,erl_lint,illegal_guard_expr}], + []}} ], ?line [] = run(Config, Ts1), ok. |