索引
1. 引子 ....................................................................................................................................................3
2. 正则表达式的历史 ............................................................................................................................3
３
.
正则表达式定义
......................................................................................................................................... 3
3.1 普通字符 ...........................................................................................................................................4
3.2 非打印字符 .......................................................................................................................................4
3.3 特殊字符 ...........................................................................................................................................4
3.4 限定符 ...............................................................................................................................................5
3.5 定位符 ...............................................................................................................................................6
3.6 选择 ...................................................................................................................................................6
3.7 后向引用 ...........................................................................................................................................6
4.
各种操作符的运算优先级
........................................................................................................................... 6
5.
全部符号解释
............................................................................................................................................... 6
6.
部分例子
....................................................................................................................................................... 9
7.
正则表达式匹配规则
................................................................................................................................. 10
7.1 基本模式匹配 .................................................................................................................................10
7.2 字符簇 .............................................................................................................................................11
7.3 确定重复出现 .................................................................................................................................13
