On 2019-12-27 19:44:59 +0000, H. S. Teoh said:
Since graphemes are variable-length in terms of code points, you can't exactly *edit* a range of graphemes -- you can't replace a 1-codepoint grapheme with a 6-codepoint grapheme, for example, since there's no space in the underlying string to store that.
Hi, my idea was that when I use a grapheme range, it will abstract away that graphemes consist of different sized code-points. And the docs at https://dlang.org/phobos/std_uni.html#byGrapheme show an example using this kind of range:
auto gText = text.byGrapheme; gText.take(3); gText.drop(3); But maybe I need to get a better understanding of the ranges stuff too...
If you want to add/delete/change graphemes, what you *really* want is to use an array of Graphemes: Grapheme editableGraphs; You can then splice it, insert stuff, delete stuff, whatever. When you're done with it, convert it back to string with something like this: string result = editableGraphs.map!(g => g).joiner.to!string;
I played around with this approach... string r1 = "Robert M. Münch"; // Code-Units = 16 // Code-Points = 15 // Graphemes = 15 Grapheme gr1 = r1.byGrapheme.array; writeln(" Text = ", gr1.map!(g => g).joiner.to!string); // Text = obert M. Münch writeln("wText = ", gr1.map!(g => g).joiner.to!wstring); // wText = obert M. Münch writeln("dText = ", gr1.map!(g => g).joiner.to!dstring); // dText = obert M. Münch Why is the first letter missing? Is this a bug? -- Robert M. Münch http://www.saphirion.com smarter | better | faster