stdio line-streaming revisited

[kris]

Andrei Alexandrescu (See Website For Email) wrote:
> kris wrote:
> 
>> Sean Kelly wrote:
>> [snip]
>>
>>> I must be missing something.  Why is the following not acceptable?
>>>
>>>     import tango.io.Console;
>>>
>>>     void main()
>>>     {
>>>         char[] name;
>>>         Cout( "Please enter your name: " ).flush;
>>>         Cin.nextLine( name );
>>>         Cout( "Hello, " )( name )( "!" );
>>>     }
>>
>>
>>
>> There used to be a tango/example like this variation:
>>
>>     import tango.io.Console;
>>
>>     void main()
>>     {
>>         Cout ("Please enter your name: ").flush;
>>         Cout ("Hello, ") (Cin.get);
>>     }
> 
> 
> Ah, also, the last line is translated into:
> 
> Cout.opCall("Hello, ").opCall(Cin.get);
> 
> D does not specify evaluation order, so the code might end up printing 
> "Hello, " before reading the standard input. It's funny this does not 
> happen exactly because of buffering, but the program has no control over 
> the buffering so it should assume flushing could happen at any time. So 
> the correct code is:
> 
> auto name = Cin.get;
> Cout("Hello, ")(name);

Well aware of that, thanks. BTW: evaluation order has been clarified 
before, on a similar topic.