How to use sprintf

[Steven Schveighoffer]

On Mon, 25 Apr 2011 11:39:28 -0400, Steven Schveighoffer  
<schveiguy at yahoo.com> wrote:

> On Mon, 25 Apr 2011 11:26:57 -0400, Vladimir Panteleev  
> <vladimir at thecybershadow.net> wrote:
>
>> On Mon, 25 Apr 2011 18:21:16 +0300, Robert Clipsham  
>> <robert at octarineparrot.com> wrote:
>>
>>> On 25/04/2011 15:56, Vladimir Panteleev wrote:
>>>> On Mon, 25 Apr 2011 17:19:12 +0300, Steven Schveighoffer
>>>> <schveiguy at yahoo.com> wrote:
>>>>
>>>>> The problem the OP has is he is casting buffer to a char *. He should
>>>>> just use buffer.ptr.
>>>>
>>>> Casting a string to char* is exactly the same as using the .ptr
>>>> property, as far as generated code is concerned.
>>>
>>> Not when a string is defined internally as struct { size_t length;  
>>> immutable(char)* ptr; }. Casting to char* is a pointer to the start of  
>>> the length, not the pointer.
>>
>> Try it.
>>
>
> BTW, that got me curious what the real failure of the original code was,  
> and I tried it.  Turns out, it actually runs successfully!
>
> So I can only guess that the OP didn't post his actually failing code.

Regardless of all this, cast(char *)buffer is *not* recommended D code,  
and will likely fail in some future 2.x version of the compiler.

Man, I should learn to collect all my thoughts before posting :)

-Steve