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s/// replacement: implement the \U \L \u \l \E case-conversion escapes #540
Description
GNU sed supports case-conversion escapes in the replacement text of s///. None of them work in uutils sed today.
$ echo "abc def" | sed 's/b\(.*\)/\U&/'| script | uutils sed | GNU sed 4.9 |
|---|---|---|
s/b\(.*\)/\U&/ |
aUbc def |
aBC DEF |
s/b\(.*\)/\u&/ |
aubc def |
aBc def |
s/b\(.*\)/\L&/ |
a\Lbc def |
abc def |
s/b\(.*\)/\l&/ |
a\lbc def |
abc def |
s/b\(.*\)/\E&/ |
a\Ebc def |
abc def |
Activity
dedsec-terminal commentedon Sep 15, 2026
Opened #557 for this — implements GNU \\U \L \u \l \E\ in \s///\ replacement (literals, &, \\1..9, with \g-per-occurrence reset and empty-match carry). Verified against GNU sed 4.9 on the issue table plus edge cases; \cargo test --lib\ 368 passed, integration 265 passed, clippy clean. PTAL.
sed: implement \\U \\L \\u \\l \\E case-conversion escapes in s/// (f…
sed: implement \\U \\L \\u \\l \\E case-conversion escapes in s/// (f…
sed: implement \\U \\L \\u \\l \\E case-conversion escapes in s/// (f…