Reg assoc



   reg_assoc() - A regular pattern substring extractor

语法 =

   mixed  *reg_assoc(string  str,  string *pat_arr, mixed *tok_arr, void | mixed def);


   reg_assoc takes a string and explodes it into substrings  matching  the
   regular expression pattern-strings given in pat_arr and associates them
   with tokens given in tok_arr. If def (default 0) is given, it is  asso‐
   ciated  with  a  non-match. The return value is an array of two arrays,
   the 1st being an array of the form

        ({ non-match1, match1, non-match2, match2, ...,
           non-match n, match n, non-match n+1 })

   and the 2nd holds the tokens corresponding to the matches in order

        ({ def, token corresponding to match1, ....,  def,           token
   corresponding to match n, def }).

   pat_arr  and  tok_arr  must  be  of  the same sizes, the ith element in
   tok_arr being the corresponding token to the ith  element  of  pat_arr.
   pat_arr can only hold strings.

   If pat_arr (and hence tok_arr) has size 0 then the return value is sim‐
   ply ({ ({ str }), ({ def }) }).


   #define STRING_PAT "\"(\\\\.|[^\\\"])*\""
   #define NUM_PAT "[0-9]+"

   #define F_STRING 1
   #define F_NUM 2

   reg_assoc("Blah \"blah\" test 203 hhh j 308 \"bacdcd\b\"acb",
     ({ STRING_PAT, NUM_PAT }), ({ F_STRING, F_NUM }), "no-match")

   will return
   ({ ({ "Blah ", "\"blah\"", " test ", "203", " hhh j ", "308", " ",
         "\"bacdcd\b\"", "acb" }),
      ({ "no-match", F_STRING, "no-match", F_NUM, "no-match", F_NUM,
         "no-match", F_STRING, "no-match" }) })