On Sunday, 8 March 2015 at 21:41:44 UTC, FG wrote:
On 2015-03-08 at 20:26, Meta wrote:
On Sunday, 8 March 2015 at 18:57:38 UTC, Kagamin wrote:
http://dpaste.dzfl.pl/2c8d4a7d9ef0 like this.
What in the world is that code doing? I'm having a hard time
wrapping my head around this.
It's a trick to reuse string internals to store an int.
A string is a struct with two values (length, ptr).
ivalue(i) is used to set ptr = i and length = 0.
Except that with this solution you will confuse empty strings
with ints.
You could give such strings special treatment by replacing:
this(string s){ svalue=s; }
with:
this(string s){ svalue=s; if (!s.length) svalue =
cast(string)(cast(char*)0)[X..X]; }
// where X is some magic int value to mark that we are
dealing with an empty string,
you'd still be confused if someone actually wanted to store the
X value.
Oh, I see. What was tripping me up was
`svalue=cast(string)(cast(char*)0)[i..i];`
But I see now that it's just creating an empty string.
