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[Bruno Medeiros]

On 02/06/2011 16:28, KennyTM~ wrote:
> On Jun 2, 11 22:47, Bruno Medeiros wrote:
>> On 30/05/2011 18:41, KennyTM~ wrote:
>>> On May 31, 11 00:59, Jose Armando Garcia wrote:
>>> [snip]
>>>>
>>>> Walter, what do you think about adding __MODULE__ to the language? It
>>>> will work similar to __FILE__ and __LINE__ but instead get replaced by
>>>> the name of the module. This would be really useful for std.log's
>>>> verbosity filtering feature.
>>>>
>>>> I can send a pull request once I am familiar with dmd's code.
>>>>
>>>> Thanks,
>>>> -Jose
>>>
>>> I'd recommend making __MODULE__ return the actual module object instead
>>> of the module name, in case anybody wants to implement it. The latter
>>> can be easily got by __MODULE__.stringof[7..$] or parsing
>>> std.traits.mangledName!__MODULE__ if you need the fully-qualified name,
>>> but the reverse is not true.
>>>
>>> Moreover, making __MODULE__ a true module object allows a global scope
>>> be passed around implicitly, e.g. currently you need to write
>>>
>>> int f(int x) { return x*x-2; }
>>> void main() {
>>> auto m = map!((y){ return f(y)+1; })([1,6,8]);
>>> // ^^^^^^^^^^^^^^^^^^^^^ ugly
>>>
>>> but with __MODULE__ it is possible to reduce the syntactic noise:
>>>
>>> auto m = map!"f(a)+1"([1,6,8]);
>>>
>>> by declaring std.functional.unaryFun as
>>>
>>> template unaryFun(alias f, ....., alias mod=__MODULE__) {
>>> ...
>>> with (mod) {
>>> mixin(f);
>>> }
>>> ...
>>
>> Why do we need __MODULE__ at all for that, a new key does not seems
>> necessary. Instead of "__MODULE__.stringof[7..$]" there is
>> ".stringof[7..$]" which works already. As for accessing the module scope
>> itself, perhaps we could use ".this" as a syntax.
>>
>
> __MODULE__ is evaluated at instantiation site, like __FILE__ and
> __LINE__, while .stringof is evaluated at definition site.

Ah, I see what you mean, when they are used as default arguments in 
functions and templates, right? Didn't recall that was the case.


-- 
Bruno Medeiros - Software Engineer