PCRE_STUDY(3)            ( 24 June 2012)            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 addi-
          tional information 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 com-
          piled 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.

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