DMD 0.163 release

[Walter Bright]

Andrei Khropov wrote:
>> If we can use FQN access a symbol directly, not need any importing, all
>> things going bo be consistent and natural.
>>
>> int main(void)
>> {
>>    std.stdio.writefln("Just do it"); // not need any importing
>>    ...
>> }
> 
> Well, it's how C# (and other .NET languages) does that. 
> 
> But I think explicit module declarations are more informative
> (you just look at the beginnig of the file to find out what it depends on)
>  and also aids tools like Build (no need to parse all the code to figure out
> dependencies)

I agree. There needs to be some 'anchor' that says where the names are 
coming from. Otherwise, the compiler can't tell the difference between 
an undefined identifier and a file not found. Even worse, a misspelled 
identifier can result in some odd module being imported, and all kinds 
of mischief.

Just like implicit declaration of variables is a bad idea, implicit 
importing is a bad idea.