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digitalmars.D.learn - How do you print all Unicode characters in a range - I want the

reply Daniel Donnelly, Jr. <enjoysmath gmail.com> writes:
```
	dstring s = "";
	for (dchar i='ₐ'; i < 'ₜ'; i++)
		s ~= i;
	writeln(s);
```

Doesn't work.  The result I get is shit:

ₐₑₒₓₔₕₖₗₘₙₚₛ
Dec 01 2022
next sibling parent rikki cattermole <rikki cattermole.co.nz> writes:
The output will be bad because of Windows specific behavior related to 
not outputting as UTF-16.

This will print all the characters in the block "Superscripts and 
Subscripts".

The Unicode database is very out of date (just waiting for merge for 
update), but should be ok for this example.

```
import std.uni : unicode;
import std.stdio : writefln;
void main() {
     foreach(c; unicode.InSuperscriptsandSubscripts.byCodepoint)
     	writefln!"U+%X = "(c, c);
}
```

Unfortunately I'm not seeing an obvious way of determining 
subscript/superscript from what we have.

You can do it with the help of[0] via Super/Sub field values, which 
originate from UnicodeData.txt's Decomposition_Type field, but you 
shouldn't parse that if you only want just this one set of values.

[0] 
https://www.unicode.org/Public/15.0.0/ucd/extracted/DerivedDecompositionType.txt
Dec 01 2022
prev sibling parent reply Adam D Ruppe <destructionator gmail.com> writes:
On Friday, 2 December 2022 at 05:27:40 UTC, Daniel Donnelly, Jr. 
wrote:

 Doesn't work.  The result I get is shit:


The problem is just that writeln to the console is broken. You 
can either write to a function instead and load it in a text 
editor, or use a non-broken writeln like my terminal.d's

```
void main() {
         // using the same string...
         dstring s = "";
         for (dchar i='ₐ'; i < 'ₜ'; i++)
                 s ~= i;

         // this will output correctly
         import arsd.terminal;
         auto terminal = Terminal(ConsoleOutputMode.linear);
         terminal.writeln(s);

         // this will not
         import std.stdio;
         writeln(s);
}
```

Screenshot output:
http://arsdnet.net/dcode/writelnsux.png


Now, while it outputs correctly, you'll still note a bunch of 
empty boxes. That's because the *font* I'm using doesn't include 
those characters. If you changed fonts there's a decent chance 
you can see those too.
Dec 03 2022
next sibling parent Adam D Ruppe <destructionator gmail.com> writes:
On Saturday, 3 December 2022 at 14:43:15 UTC, Adam D Ruppe wrote:

         import arsd.terminal;


oh yeah my module:

can download direct and compile with your program
https://github.com/adamdruppe/arsd/blob/master/terminal.d

or it is also on dub
https://code.dlang.org/packages/arsd-official%3Aterminal
Dec 03 2022
prev sibling parent Adam D Ruppe <destructionator gmail.com> writes:
On Saturday, 3 December 2022 at 14:43:15 UTC, Adam D Ruppe wrote:

 The problem is just that writeln to the console is broken. You 
 can either write to a function instead and load it in a text 
 editor


aaargh not to a "function" i meant to a "file".

like

auto f = File("test.txt", "wt");
f.writeln(s);


then open test.txt and make sure it is opened in utf-8 mode.
Dec 03 2022