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| author | Tony Cook <tony@develop-help.com> | 2020-09-14 16:00:28 +1000 |
|---|---|---|
| committer | Steve Hay <steve.m.hay@googlemail.com> | 2021-01-06 17:40:16 +0000 |
| commit | 536520b4a24d012a8aa0690f044f651300258171 (patch) | |
| tree | cd3879de39c809692ce490c1c169a2722786f253 /t/lib/croak/regcomp | |
| parent | 7925f8dfc09ddebcbfa214fdcd854c52090586f9 (diff) | |
| download | perl-536520b4a24d012a8aa0690f044f651300258171.tar.gz | |
don't croak when the \K follows the lookaround assertion
this also simplifies the flagging for these assertions, since this
error is now the only thing using in_lookhead and in_lookbehind they
can be combined into a single in_lookaround.
Rather than conditional increment/decrement as we recurse into S_reg
I simply save the value of in_lookaround and restore it before
returning. Some unsuccessful or restart paths don't do the restore,
but they either result in a croak(), or a restart which reinitialises
in_lookaround anyway.
Also added tests to ensure that all the different zero-width assertions
with content trigger the error.
(cherry picked from commit 80f44cf4982e395989f886220e05dd2071bb205a)
Diffstat (limited to 't/lib/croak/regcomp')
| -rw-r--r-- | t/lib/croak/regcomp | 43 |
1 files changed, 41 insertions, 2 deletions
diff --git a/t/lib/croak/regcomp b/t/lib/croak/regcomp index 476b239fa7..74e70ed363 100644 --- a/t/lib/croak/regcomp +++ b/t/lib/croak/regcomp @@ -77,15 +77,54 @@ EXPECT Too many nested open parens in regex; marked by <-- HERE in m/(( <-- HERE a))/ at - line 3. ######## # NAME \K not permitted in lookahead -$x =~ /(?=a\Ka)a/; +qr/(?=a\Ka)a/; EXPECT \K not permitted in lookahead/lookbehind in regex; marked by <-- HERE in m/(?=a\K <-- HERE a)a/ at - line 1. ######## +# NAME \K not permitted in lookahead (alpha) +no warnings 'experimental::alpha_assertions'; +qr/(*positive_lookahead:a\Ka)a/; +EXPECT +\K not permitted in lookahead/lookbehind in regex; marked by <-- HERE in m/(*positive_lookahead:a\K <-- HERE a)a/ at - line 2. +######## +# NAME \K not permitted in negative lookahead +qr/(?!a\Ka)a/; +EXPECT +\K not permitted in lookahead/lookbehind in regex; marked by <-- HERE in m/(?!a\K <-- HERE a)a/ at - line 1. +######## +# NAME \K not permitted in negative lookahead (alpha) +no warnings 'experimental::alpha_assertions'; +qr/(*negative_lookahead:a\Ka)a/; +EXPECT +\K not permitted in lookahead/lookbehind in regex; marked by <-- HERE in m/(*negative_lookahead:a\K <-- HERE a)a/ at - line 2. +######## # NAME \K not permitted in lookbehind -$x =~ /(?<=a\Ka)a/; +qr/(?<=a\Ka)a/; EXPECT \K not permitted in lookahead/lookbehind in regex; marked by <-- HERE in m/(?<=a\K <-- HERE a)a/ at - line 1. ######## +# NAME \K not permitted in lookbehind (alpha) +no warnings 'experimental::alpha_assertions'; +qr/(*positive_lookbehind:a\Ka)a/; +EXPECT +\K not permitted in lookahead/lookbehind in regex; marked by <-- HERE in m/(*positive_lookbehind:a\K <-- HERE a)a/ at - line 2. +######## +# NAME \K not permitted in negative lookbehind +qr/(?<!a\Ka)a/; +EXPECT +\K not permitted in lookahead/lookbehind in regex; marked by <-- HERE in m/(?<!a\K <-- HERE a)a/ at - line 1. +######## +# NAME \K not permitted in negative lookbehind (alpha) +no warnings 'experimental::alpha_assertions'; +qr/(*negative_lookbehind:a\Ka)a/; +EXPECT +\K not permitted in lookahead/lookbehind in regex; marked by <-- HERE in m/(*negative_lookbehind:a\K <-- HERE a)a/ at - line 2. +######## +# NAME \K is permitted after the lookahead GH#18123 +qr/(?=(?=x)x)\K/; +EXPECT +OPTIONS nonfatal +######## # NAME numeric parsing buffer overflow in numeric.c 0=~/\p{nV:-0}/ EXPECT |