te')); return $arr; } /* 遍历用户所有主题 * @param $uid 用户ID * @param int $page 页数 * @param int $pagesize 每页记录条数 * @param bool $desc 排序方式 TRUE降序 FALSE升序 * @param string $key 返回的数组用那一列的值作为 key * @param array $col 查询哪些列 */ function thread_tid_find_by_uid($uid, $page = 1, $pagesize = 1000, $desc = TRUE, $key = 'tid', $col = array()) { if (empty($uid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('uid' => $uid), array('tid' => $orderby), $page, $pagesize, $key, $col); return $arr; } // 遍历栏目下tid 支持数组 $fid = array(1,2,3) function thread_tid_find_by_fid($fid, $page = 1, $pagesize = 1000, $desc = TRUE) { if (empty($fid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('fid' => $fid), array('tid' => $orderby), $page, $pagesize, 'tid', array('tid', 'verify_date')); return $arr; } function thread_tid_delete($tid) { if (empty($tid)) return FALSE; $r = thread_tid__delete(array('tid' => $tid)); return $r; } function thread_tid_count() { $n = thread_tid__count(); return $n; } // 统计用户主题数 大数量下严谨使用非主键统计 function thread_uid_count($uid) { $n = thread_tid__count(array('uid' => $uid)); return $n; } // 统计栏目主题数 大数量下严谨使用非主键统计 function thread_fid_count($fid) { $n = thread_tid__count(array('fid' => $fid)); return $n; } ?>javascript - Allowing for quotes and unicode in PEG.js grammar definitions - Stack Overflow

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    How would one allow for single and double quotes, as well as unicode characters inside of a PEG.js grammar definition? To be more specific, I'd like to be able to capture strings that can contain both single and double quotes (will most likely have to be \ escaped) and all unicode characters.

    At the moment I have something like the following:

    _ name:$(PROP_ASCII+) CHAR_SQ val:$(PROP_ASCII_INNER*) CHAR_SQ

    which would capture something like

    key'value'

    PROP_ASCII* is defined as

    PROP_ASCII = [!-&(-<>-~] PROP_ASCII_INNER = [ -&(-~]

    So this works fine and dandy if value contains standard ASCII characters and does not contain single quotes... But I'd like to support what I've described above, so something like this would bee possible:

    key'somé\'value\'☂'

    Thoughts?

    How would one allow for single and double quotes, as well as unicode characters inside of a PEG.js grammar definition? To be more specific, I'd like to be able to capture strings that can contain both single and double quotes (will most likely have to be \ escaped) and all unicode characters.

    At the moment I have something like the following:

    _ name:$(PROP_ASCII+) CHAR_SQ val:$(PROP_ASCII_INNER*) CHAR_SQ

    which would capture something like

    key'value'

    PROP_ASCII* is defined as

    PROP_ASCII = [!-&(-<>-~] PROP_ASCII_INNER = [ -&(-~]

    So this works fine and dandy if value contains standard ASCII characters and does not contain single quotes... But I'd like to support what I've described above, so something like this would bee possible:

    key'somé\'value\'☂'

    Thoughts?

    • javascript
    • unicode
    • grammar
    • quotes
    • pegjs
    Share Improve this question asked Nov 26, 2015 at 22:39 SpeedySpeedy 4771 gold badge6 silver badges16 bronze badges
    Add a ment  | 

    2 Answers 2

    Reset to default 17

    This example should get you going. It supports both single and double quotes which can also be escaped within the string.

    Try it in the online editor.

    Value
  = '"' chars:DoubleStringCharacter* '"' { return chars.join(''); }
  / "'" chars:SingleStringCharacter* "'" { return chars.join(''); }

DoubleStringCharacter
  = !('"' / "\\") char:. { return char; }
  / "\\" sequence:EscapeSequence { return sequence; }

SingleStringCharacter
  = !("'" / "\\") char:. { return char; }
  / "\\" sequence:EscapeSequence { return sequence; }

EscapeSequence
  = "'"
  / '"'
  / "\\"
  / "b"  { return "\b";   }
  / "f"  { return "\f";   }
  / "n"  { return "\n";   }
  / "r"  { return "\r";   }
  / "t"  { return "\t";   }
  / "v"  { return "\x0B"; }

    Found a solution inside this example file PEG.js JSON grammar. Unicode strings with escape characters can be defined as such:

    string "string"
  = quotation_mark chars:char* quotation_mark { return chars.join(""); }

char
  = unescaped
  / escape
    sequence:(
        '"'
      / "\\"
      / "/"
      / "b" { return "\b"; }
      / "f" { return "\f"; }
      / "n" { return "\n"; }
      / "r" { return "\r"; }
      / "t" { return "\t"; }
      / "u" digits:$(HEXDIG HEXDIG HEXDIG HEXDIG) {
          return String.fromCharCode(parseInt(digits, 16));
        }
    )
    { return sequence; }

escape         = "\\"
quotation_mark = '"'
unescaped      = [\x20-\x21\x23-\x5B\x5D-\u10FFFF]

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