pcre2_set_compile_extra_options man page

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SYNOPSIS

#include <pcre2.h>

int pcre2_set_compile_extra_options(pcre2_compile_context *ccontext, uint32_t extra_options);

DESCRIPTION

This function sets additional option bits for pcre2_compile() that are housed in a compile context. It completely replaces all the bits. The extra options are:

  PCRE2_EXTRA_ALLOW_LOOKAROUND_BSK     Allow \K in lookarounds  PCRE2_EXTRA_ALLOW_SURROGATE_ESCAPES  Allow \x{df800} to \x{dfff}
                                         in UTF-8 and UTF-32 modes
  PCRE2_EXTRA_ALT_BSUX                 Extended alternate \u, \U, and \x handling
  PCRE2_EXTRA_BAD_ESCAPE_IS_LITERAL    Treat all invalid escapes as a literal following character
  PCRE2_EXTRA_ESCAPED_CR_IS_LF         Interpret \r as \n
  PCRE2_EXTRA_MATCH_LINE               Pattern matches whole lines
  PCRE2_EXTRA_MATCH_WORD               Pattern matches "words"

There is a complete description of the PCRE2 native API in the pcre2api page and a description of the POSIX API in the pcre2posix page.

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