Created
May 14, 2014 14:50
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Erlangで例外スタックトレースに引数情報を乗せる方法 ref: http://qiita.com/sile/items/2b11cdd0399e20d34dcc
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| -module(exception_test). | |
| -export([hoge/1, fuga/1]). | |
| %% @doc erlang:error/1を使って例外送出 | |
| hoge(_Arg) -> | |
| error(badarg). | |
| %% @doc erlang:error/2を使って例外送出 | |
| fuga(Arg) -> | |
| error(badarg, [Arg]). |
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| $ erl | |
| Erlang R16B03-1 (erts-5.10.4) [source] [64-bit] | |
| Eshell V5.10.4 (abort with ^G) | |
| > c(exception_test). | |
| {ok, exception_test} | |
| %% erlang:error/1の場合のエラー表示およびスタックトレース | |
| > exception_test:hoge(erlang). | |
| ** exception error: bad argument | |
| in function exception_test:hoge/1 (exception_test.erl, line 8) | |
| > catch exception_test:hoge(erlang). | |
| {'EXIT',{badarg,[{exception_test,hoge,1, | |
| [{file,"exception_test.erl"},{line,8}]}, | |
| {erl_eval,do_apply,6,[{file,"erl_eval.erl"},{line,573}]}, | |
| {erl_eval,expr,5,[{file,"erl_eval.erl"},{line,357}]}, | |
| {shell,exprs,7,[{file,"shell.erl"},{line,674}]}, | |
| {shell,eval_exprs,7,[{file,"shell.erl"},{line,629}]}, | |
| {shell,eval_loop,3,[{file,"shell.erl"},{line,614}]}]}} | |
| %% erlang:error/2の場合のエラー表示およびスタックトレース | |
| > exception_test:fuga(erlang). | |
| ** exception error: bad argument | |
| in function exception_test:fuga/1 | |
| called as exception_test:fuga(erlang) % 引数情報が表示される | |
| > catch exception_test:fuga(erlang). | |
| {'EXIT',{badarg,[{exception_test,fuga, | |
| [erlang], % アリティの代わりに引数が取得できる | |
| [{file,"exception_test.erl"},{line,13}]}, | |
| {erl_eval,do_apply,6,[{file,"erl_eval.erl"},{line,573}]}, | |
| {erl_eval,expr,5,[{file,"erl_eval.erl"},{line,357}]}, | |
| {shell,exprs,7,[{file,"shell.erl"},{line,674}]}, | |
| {shell,eval_exprs,7,[{file,"shell.erl"},{line,629}]}, | |
| {shell,eval_loop,3,[{file,"shell.erl"},{line,614}]}]}} |
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