Is this intended behaviour?

# import std.stdio;
#
# void main()
# {
#   char c = 'a';
#   char[] str;
#
#   str = str ~ c;
#
#   writefln(str);
#   c = 'b';
#   writefln(str);
# }

Output:
a
b

In other words, 'str ~ c' when str is empty results in a 'slice' of the character c. If it IS intended, I don't think it should be, because it probably isn't what the programmer intended (in my case 'c' was the loop variable in a foreach loop, and this bug was NOT easy to find, believe me...) It's also inconsistent with the behaviour of str ~= c in the same situation.

Nick

On Tue, 21 Jun 2005 17:16:33 +0000 (UTC), Nick wrote:

> Is this intended behaviour?
> 
> # import std.stdio;
> #
> # void main()
> # {
> #   char c = 'a';
> #   char[] str;
> #
> #   str = str ~ c;
> #
> #   writefln(str);
> #   c = 'b';
> #   writefln(str);
> # }
> 
> Output:
> a
> b
> 
> In other words, 'str ~ c' when str is empty results in a 'slice' of the character c. If it IS intended, I don't think it should be, because it probably isn't what the programmer intended (in my case 'c' was the loop variable in a foreach loop, and this bug was NOT easy to find, believe me...) It's also inconsistent with the behaviour of str ~= c in the same situation.
> 
> Nick

I'm sure this is a bug. Replace "str = str ~ c;" with "str ~= c;" and it works as expected.

-- 
Derek
Melbourne, Australia
22/06/2005 10:05:04 AM

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Nick schrieb am Tue, 21 Jun 2005 17:16:33 +0000 (UTC):
> Is this intended behaviour?
>
> # import std.stdio;
> #
> # void main()
> # {
> #   char c = 'a';
> #   char[] str;
> #
> #   str = str ~ c;
> #
> #   writefln(str);
> #   c = 'b';
> #   writefln(str);
> # }
>
> Output:
> a
> b
>
> In other words, 'str ~ c' when str is empty results in a 'slice' of the character c. If it IS intended, I don't think it should be, because it probably isn't what the programmer intended (in my case 'c' was the loop variable in a foreach loop, and this bug was NOT easy to find, believe me...) It's also inconsistent with the behaviour of str ~= c in the same situation.
>
> Nick

Added to DStress as http://dstress.kuehne.cn/run/o/opCat_15_A.d http://dstress.kuehne.cn/run/o/opCat_15_B.d http://dstress.kuehne.cn/run/o/opCat_15_C.d http://dstress.kuehne.cn/run/o/opCat_15_D.d http://dstress.kuehne.cn/run/o/opCat_15_E.d http://dstress.kuehne.cn/run/o/opCat_15_F.d http://dstress.kuehne.cn/run/o/opCat_15_G.d http://dstress.kuehne.cn/run/o/opCat_15_H.d http://dstress.kuehne.cn/run/o/opCat_15_I.d http://dstress.kuehne.cn/run/o/opCat_15_J.d http://dstress.kuehne.cn/run/o/opCat_15_K.d http://dstress.kuehne.cn/run/o/opCat_15_L.d http://dstress.kuehne.cn/run/o/opCat_15_M.d http://dstress.kuehne.cn/run/o/opCat_15_N.d http://dstress.kuehne.cn/run/o/opCat_15_O.d http://dstress.kuehne.cn/run/o/opCat_15_P.d http://dstress.kuehne.cn/run/o/opCat_15_Q.d http://dstress.kuehne.cn/run/o/opCat_15_R.d http://dstress.kuehne.cn/run/o/opCat_15_S.d http://dstress.kuehne.cn/run/o/opCat_15_T.d http://dstress.kuehne.cn/run/o/opCat_15_U.d

Thomas


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