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PCRE_STUDY(3)              Library Functions Manual              PCRE_STUDY(3)

       PCRE - Perl-compatible regular expressions


       #include <pcre.h>

       pcre_extra *pcre_study(const pcre *code, int options,
            const char **errptr);

       pcre16_extra *pcre16_study(const pcre16 *code, int options,
            const char **errptr);

       pcre32_extra *pcre32_study(const pcre32 *code, int options,
            const char **errptr);


       This function studies a compiled pattern, to see if additional informa-
       tion can be extracted that might speed up matching. Its arguments are:

         code       A compiled regular expression
         options    Options for pcre[16|32]_study()
         errptr     Where to put an error message

       If the function succeeds, it returns a value  that  can  be  passed  to
       pcre[16|32]_exec() or pcre[16|32]_dfa_exec() via their extra arguments.

       If  the  function returns NULL, either it could not find any additional
       information, or there was an error. You  can  tell  the  difference  by
       looking at the error value. It is NULL in first case.

       The  only  option  is  PCRE_STUDY_JIT_COMPILE. It requests just-in-time
       compilation if possible. If PCRE has been compiled without JIT support,
       this option is ignored. See the pcrejit page for further details.

       There  is  a complete description of the PCRE native API in the pcreapi
       page and a description of the POSIX API in the pcreposix page.

PCRE 8.30                         24 June 2012                   PCRE_STUDY(3)

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