[erlang-patches] EEP37: Funs with names

Anthony Ramine <>
Thu Nov 28 13:52:29 CET 2013


Hello Björn,

Replied inline.

-- 
Anthony Ramine

Le 28 nov. 2013 à 13:44, Björn Gustavsson <> a écrit :

> On Wed, Nov 14, 2012 at 5:42 PM, Anthony Ramine <> wrote:
> This patch implements EEP37: Funs with names
> 
> 
> It is now much closer to being graduated.
> 
> I have added the branch to our daily builds for the master branch.

Cool.

> I would like a comment from Kostis about the Dialyzer changes.

Me too, he suggested to me that it might break HiPE too but I couldn’t make HiPE crash.

> What also remains is coverage in test suites. I have fixed a few,
> but xref_SUITE remains to be fixed (a named fun with the '_' name
> should be tested).

Will do.

> Here are my fixes for the test suites (also included as an attachment
> to make it easier to apply):

Will apply.

> diff --git a/lib/compiler/test/fun_SUITE.erl b/lib/compiler/test/fun_SUITE.erl
> index 0ff846e..e35692e 100644
> --- a/lib/compiler/test/fun_SUITE.erl
> +++ b/lib/compiler/test/fun_SUITE.erl
> @@ -197,10 +197,14 @@ external(Config) when is_list(Config) ->
>  call_me(I) ->
>      {ok,I}.
>  
> -id(I) ->
> -    I.
> -
>  eep37(Config) when is_list(Config) ->
>      F = fun Fact(N) when N > 0 -> N * Fact(N - 1); Fact(0) -> 1 end,
> +    Add = fun _(N) -> N + 1 end,
> +    UnusedName = fun BlackAdder(N) -> N + 42 end,
>      720 = F(6),
> +    10 = Add(9),
> +    50 = UnusedName(8),
>      ok.
> +
> +id(I) ->
> +    I.
> diff --git a/lib/debugger/test/fun_SUITE.erl b/lib/debugger/test/fun_SUITE.erl
> index 569af6c..75e3b55 100644
> --- a/lib/debugger/test/fun_SUITE.erl
> +++ b/lib/debugger/test/fun_SUITE.erl
> @@ -288,10 +288,14 @@ external(Config) when is_list(Config) ->
>  call_me(I) ->
>      {ok,I}.
>  
> -id(I) ->
> -    I.
> -
>  eep37(Config) when is_list(Config) ->
>      F = fun Fact(N) when N > 0 -> N * Fact(N - 1); Fact(0) -> 1 end,
> +    Add = fun _(N) -> N + 1 end,
> +    UnusedName = fun BlackAdder(N) -> N + 42 end,
>      720 = F(6),
> +    10 = Add(9),
> +    50 = UnusedName(8),
>      ok.
> +
> +id(I) ->
> +    I.
> diff --git a/lib/stdlib/test/erl_lint_SUITE.erl b/lib/stdlib/test/erl_lint_SUITE.erl
> index ea90793..ad51bfa 100644
> --- a/lib/stdlib/test/erl_lint_SUITE.erl
> +++ b/lib/stdlib/test/erl_lint_SUITE.erl
> @@ -644,7 +644,9 @@ unused_vars_warn_fun(Config) when is_list(Config) ->
>                u() ->
>                    fun U(U) -> foo end; % U shadowed. U unused.
>                u() ->
> -                  fun U(1) -> U; U(U) -> foo end. % U shadowed. U unused.
> +                  fun U(1) -> U; U(U) -> foo end; % U shadowed. U unused.
> +              u() ->
> +                  fun _(N) -> N + 1 end.  % Cover handling of '_' name.
>             ">>,
>             [warn_unused_vars],
>             {error,[{3,erl_lint,{unbound_var,'U'}}],
> 
> 
> id/1 is a common help function, so I want it to remain at the end
> of the file.

Thanks for nitpicking even more than myself :p

> /Bjorn



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