www.digitalmars.com         C & C++   DMDScript  

digitalmars.D.learn - Assert prints an "array of char" when used why to!string

reply "monarch_dodra" <monarchdodra gmail.com> writes:
Code:

----
import std.conv;
void main() {
   static assert(
     is(typeof(("Failure: " ~ to!string(55)) == string))
   );

   static assert(0 , ("Failure: " ~ to!string(55)));
}
----
main.d(7): Error: static assert  
['F','a','i','l','u','r','e',':',' ','5','5']
----

The problem is the ugly-ass "print as array of individual 
characters".

I really don't understand what is going on, since the compile 
type of my string is indeed "string".

If I remove the "to!string", I get:
----
main.d(7): Error: static assert  "Failure"
----

1) Is this the "normal" behavior, or a "known limitation"?
2) Is there a "workaround"?

FYI, this was originally produced by code from Phobos, but was 
trimmed by me here.
Jul 27 2012
next sibling parent reply "bearophile" <bearophileHUGS lycos.com> writes:
monarch_dodra:


 1) Is this the "normal" behavior, or a "known limitation"?



It seems a DMD bug, why don't you add it to Bugzilla?



 2) Is there a "workaround"?



static assert(0, text("Failure: ", 55));

Bye,
bearophile
Jul 27 2012
parent =?UTF-8?B?QWxpIMOHZWhyZWxp?= <acehreli yahoo.com> writes:
On 07/27/2012 09:02 AM, monarch_dodra wrote:

 On Friday, 27 July 2012 at 11:56:07 UTC, bearophile wrote:

 monarch_dodra:


 1) Is this the "normal" behavior, or a "known limitation"?



 It seems a DMD bug, why don't you add it to Bugzilla?



 2) Is there a "workaround"?



 static assert(0, text("Failure: ", 55));

 Bye,
 bearophile



 Thanks. I'll create an entry in bugzilla.



Thanks. I hope that will fix the Unicode ignorance of 'static assert' as 
well:

     static assert(false, "aüz");

produces the following output:

   Error: static assert  "a\xc3\xbcz"

Ali
Jul 27 2012
prev sibling next sibling parent "novice2" <sorry noem.ail> writes:
BTW, in docs about "text":

http://dlang.org/phobos/std_conv.html#text

"...Convenience functions for converting any number and types of
arguments into text (the three character widths)... "

What is the "three character widths" note?
Who knows?
Jul 27 2012
prev sibling next sibling parent "Adam D. Ruppe" <destructionator gmail.com> writes:
On Friday, 27 July 2012 at 14:40:33 UTC, novice2 wrote:

 What is the "three character widths" note?
 Who knows?



string, wstring, and dstring. Width refers to the bit size
of the char (8 bit, 16 bit, or 32 bit).
Jul 27 2012
prev sibling next sibling parent "novice2" <sorry noem.ail> writes:
Ah, thanks!

On Friday, 27 July 2012 at 14:47:49 UTC, Adam D. Ruppe wrote:

 On Friday, 27 July 2012 at 14:40:33 UTC, novice2 wrote:

 What is the "three character widths" note?
 Who knows?



 string, wstring, and dstring. Width refers to the bit size
 of the char (8 bit, 16 bit, or 32 bit).
Jul 27 2012
prev sibling parent "monarch_dodra" <monarchdodra gmail.com> writes:
On Friday, 27 July 2012 at 11:56:07 UTC, bearophile wrote:

 monarch_dodra:


 1) Is this the "normal" behavior, or a "known limitation"?



 It seems a DMD bug, why don't you add it to Bugzilla?



 2) Is there a "workaround"?



 static assert(0, text("Failure: ", 55));

 Bye,
 bearophile



Thanks. I'll create an entry in bugzilla.
Jul 27 2012