Are there any default dmd optimizations

[deadalnix]

On Wednesday, 27 February 2013 at 23:34:42 UTC, Walter Bright 
wrote:
> On 2/27/2013 2:55 PM, Nick Sabalausky wrote:
>> I like that, but "run arbitrary code at top level" may be a 
>> bit of a
>> problem because it conflicts with allowing forward references.
>>
>> Ie, for example:
>>
>>     void foo() { bar(); }
>>     void bar() { i = 3; }
>>     int i;
>>
>> vs:
>>
>>     void main() {
>>         void foo() { bar(); }
>>         void bar() { i = 3; }
>>         int i;
>>     }
>>
>>
>> The first one works, but the second doesn't. And my 
>> understanding is
>> that the second one not working is a deliberate thing related 
>> to
>> not being in a declaration-only context.
>
> It's a little more than that. People have a natural view of 
> function bodies as executing top down. Functions also tend to 
> be simple enough that this makes sense. People have a natural 
> view outside functions as everything happening in parallel.

Plus, this is really hard to ensure that everything is 
initialized properly without going eager with setting to init.