Re: length of string result not as expected

[Jacob Carlborg]

On 2013-08-14 05:05, Adam D. Ruppe wrote:

Your code looks like D1...

in D1 or D2:
import std.uni;
dstring s2 = toUTF32(str);
writeln(s2.length); // 13


in D2 you can do it a little more efficiently like this:

import std.range;
writeln(walkLength(str)); // 13

In D1 you can easily implement walkLength yourself:

import std.utf;

size_t walkLength (C) (C[] arr)
{
    size_t i;
    size_t len;

    while (i < arr.length)
    {
        i += arr.stride(i);
        len++;
    }

    return len;
}

void main ()
{
    auto a = "不良反應事件和產品客訴報告";
    assert(walkLength(a) == 13);
}

--
/Jacob Carlborg