In C/C++ in the presence of the preprocessor a string

char foo[] = "\
long\
string\
without\
linefeeds\
";

Is translated by the preprocessor to

char foo[] = "longstringwithoutlinefeeds";

is there a similar mechanism in D? Or should I do...

string foo =
"long"
"string"
"without"
"linefeeds"
;

On Monday, 23 September 2013 at 04:43:16 UTC, John Carter wrote:
> In C/C++ in the presence of the preprocessor a string
>
> char foo[] = "\
> long\
> string\
> without\
> linefeeds\
> ";
>
> Is translated by the preprocessor to
>
> char foo[] = "longstringwithoutlinefeeds";
>
> is there a similar mechanism in D? Or should I do...
>
> string foo =
> "long"
> "string"
> "without"
> "linefeeds"
> ;

If I'm not mistaken, this is exactly the way to do it.
A side note - Ds CTFE is quite good, so you can usually build up strings at compile-time using regular functions.

John Carter:

> is there a similar mechanism in D? Or should I do...
>
> string foo =
> "long"
> "string"
> "without"
> "linefeeds"
> ;

Genrally you should do:


string foo = "long" ~
             "string" ~
             "without" ~
             "linefeeds";

See also:
http://d.puremagic.com/issues/show_bug.cgi?id=3827

You could also write a string with newlines and then remove them at compile-time with string functions.

Bye,
bearophile

On Monday, 23 September 2013 at 09:42:59 UTC, bearophile wrote:
> John Carter:
>
>> is there a similar mechanism in D? Or should I do...
>>
>> string foo =
>> "long"
>> "string"
>> "without"
>> "linefeeds"
>> ;
>
> Genrally you should do:
>
>
> string foo = "long" ~
>              "string" ~
>              "without" ~
>              "linefeeds";
>
> See also:
> http://d.puremagic.com/issues/show_bug.cgi?id=3827
>
> You could also write a string with newlines and then remove them at compile-time with string functions.
>
> Bye,
> bearophile

Isn't "some" "string" replaced with "somestring" early on?

simendsjo:

> Isn't "some" "string" replaced with "somestring" early on?

Yes, unfortunately. And it's something Walter agreed with me to kill, but nothing has happened...

Bye,
bearophile

On Monday, 23 September 2013 at 11:10:07 UTC, bearophile wrote:
> simendsjo:
>
>> Isn't "some" "string" replaced with "somestring" early on?
>
> Yes, unfortunately. And it's something Walter agreed with me to kill, but nothing has happened...
>
> Bye,
> bearophile

Rationale / link to discussion? I use it extensively.

Dicebot:

> Rationale / link to discussion? I use it extensively.

http://d.puremagic.com/issues/show_bug.cgi?id=3827

Bye,
bearophile

On Monday, 23 September 2013 at 11:30:18 UTC, bearophile wrote:
> Dicebot:
>
>> Rationale / link to discussion? I use it extensively.
>
> http://d.puremagic.com/issues/show_bug.cgi?id=3827
>
> Bye,
> bearophile

Thanks.

Well, then we will have _guaranteed_ const-folding of adjacent concatenated string literals, I will be perfectly fine with this but it does not seem to be the case right now.