On 4/18/15 4:35 AM, Jacob Carlborg wrote:
On 2015-04-18 12:27, Walter Bright wrote:

That doesn't make sense to me, because the umlauts and the accented e
all have Unicode code point assignments.

This code snippet demonstrates the problem:

import std.stdio;

void main ()
{
     dstring a = "e\u0301";
     dstring b = "é";
     assert(a != b);
     assert(a.length == 2);
     assert(b.length == 1);
     writefln(a, " ", b);
}

If you run the above code all asserts should pass. If your system
correctly supports Unicode (works on OS X 10.10) the two printed
characters should look exactly the same.

\u0301 is the "combining acute accent" [1].

[1] http://www.fileformat.info/info/unicode/char/0301/index.htm

Isn't this solved commonly with a normalization pass? We should have a normalizeUTF() that can be inserted in a pipeline. Then the rest of Phobos doesn't need to mind these combining characters. -- Andrei

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