On Tuesday, 12 December 2023 at 14:57:48 UTC, Kevin Bailey wrote:
perm.d:8:26: error: none of the overloads of template
‘std.algorithm.iteration.permutations’ are callable using
argument types ‘!()(char[])’
8 | foreach (perm; as.permutations)
| ^
/usr/lib/gcc/x86_64-linux-gnu/13/include/d/std/algorithm/iteration.d:7919:20:
note: Candidate is: ‘permutations(Range)(Range r)’
with `Range = char[]`
must satisfy the following constraint:
` isRandomAccessRange!Range`
7919 | Permutations!Range permutations(Range)(Range r)
| ^
Because of autodecoding [1], slices of char and wchar are treated
by Phobos as bidirectional ranges of dchar. (They are not
random-access ranges because UTF-8 and UTF-16 are variable-length
encodings.)
To work around this, use std.utf.byChar:
import std.utf: byChar;
foreach (perm; as.byChar.permutations)
writeln(perm);
[1]
http://ddili.org/ders/d.en/ranges.html#ix_ranges.decoding,%20automatic
