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64549346f0
Since a608946 (Additional PCRE2_EXTRA_ASCII_xxx code, 2023-02-01)
PCRE2_EXTRA_ASCII_BSD could be used to restrict \d to ASCII causing
the following inconsistent behaviour in UCP mode.
PCRE2 version 10.43-DEV 2023-01-15
re> /\d/utf,ucp,ascii_bsd
data> ٣
No match
data>
re> /[[:digit:]]/utf,ucp,ascii_bsd
data> ٣
0: \x{663}
It has been suggested[1] that the change to match \p{Nd} when Unicode
is enabled for [:digit:] might had been unintentional and a bug, as
[:digit:] should be able to be POSIX compatible, so add a new flag
PCRE2_EXTRA_ASCII_DIGIT to avoid changing its definition in UCP mode.
[1] https://lore.kernel.org/git/CANgJU+U+xXsh9psd0z5Xjr+Se5QgdKkjQ7LUQ-PdUULSN3n4+g@mail.gmail.com/
56 lines
1.9 KiB
Groff
56 lines
1.9 KiB
Groff
.TH PCRE2_SET_COMPILE_EXTRA_OPTIONS 3 "03 February 2023" "PCRE2 10.43"
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.SH NAME
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PCRE2 - Perl-compatible regular expressions (revised API)
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.SH SYNOPSIS
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.rs
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.sp
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.B #include <pcre2.h>
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.PP
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.nf
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.B int pcre2_set_compile_extra_options(pcre2_compile_context *\fIccontext\fP,
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.B " uint32_t \fIextra_options\fP);"
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.fi
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.
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.SH DESCRIPTION
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.rs
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.sp
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This function sets additional option bits for \fBpcre2_compile()\fP that are
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housed in a compile context. It completely replaces all the bits. The extra
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options are:
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.sp
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PCRE2_EXTRA_ALLOW_LOOKAROUND_BSK Allow \eK in lookarounds
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.\" JOIN
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PCRE2_EXTRA_ALLOW_SURROGATE_ESCAPES Allow \ex{d800} to \ex{dfff}
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in UTF-8 and UTF-32 modes
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.\" JOIN
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PCRE2_EXTRA_ALT_BSUX Extended alternate \eu, \eU, and
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\ex handling
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PCRE2_EXTRA_ASCII_BSD \ed remains ASCII in UCP mode
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PCRE2_EXTRA_ASCII_BSS \es remains ASCII in UCP mode
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PCRE2_EXTRA_ASCII_BSW \ew remains ASCII in UCP mode
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.\" JOIN
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PCRE2_EXTRA_ASCII_DIGIT [:digit:] POSIX class remains ASCII
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in UCP mode
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.\" JOIN
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PCRE2_EXTRA_ASCII_POSIX POSIX classes remain ASCII in
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UCP mode
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.\" JOIN
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PCRE2_EXTRA_BAD_ESCAPE_IS_LITERAL Treat all invalid escapes as
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a literal following character
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.\" JOIN
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PCRE2_EXTRA_CASELESS_RESTRICT Disable mixed ASCII/non-ASCII
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case folding
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PCRE2_EXTRA_ESCAPED_CR_IS_LF Interpret \er as \en
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PCRE2_EXTRA_MATCH_LINE Pattern matches whole lines
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PCRE2_EXTRA_MATCH_WORD Pattern matches "words"
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.sp
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There is a complete description of the PCRE2 native API in the
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.\" HREF
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\fBpcre2api\fP
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.\"
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page and a description of the POSIX API in the
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.\" HREF
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\fBpcre2posix\fP
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.\"
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page.
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