The slightly modified code from issue 18018
```fmt.d
import std.stdio;
import core.stdc.locale;
import std.string;
void main ()
{
auto p = setlocale(LC_NUMERIC, "");
writeln (p);
writeln(p ? fromStringz(p) : "FAILURE");
auto lc = localeconv();
writefln("Decimal separator: '%s'", *lc.decimal_point);
writefln("Thousand separator: '%s'", *lc.thousands_sep);
writefln("%f", 1234567.1234);
}
```
does not use the comma as decimal separator.
$ dmd fmt
$ LANG=de_DE.utf8 ./fmt
7401B0
de_DE.utf8
Decimal separator: ','
Thousand separator: '.'
1234567.123400
expected:
1234567,123400
or even
1.234.567,123400
I wonder if there is any way in current D how to reliably achive this*). The
documentation [1] does not know decimal separators. It only mentions the word
"separator" in the context of grouping. The fracional digits are always
separated by a "dot". If the documentation defines the D formatting, must the
output
1234567,123400
given in issue 18018 considered a bug?
*) Without search/replacing . by , in the output.
[1] std.format
https://dlang.org/phobos/std_format.html
Comment #1 by robert.schadek — 2024-12-01T16:40:14Z