ABAP supports extended regular expressions (ERE), which can support the following keywords
FIND
REPLACE
It can also be used as a variable of the following function (Built-in function)
count, count_...
contains_...
find, find_...
match
matches
replace
substring, substring_...
The following classes also support the use of regular expressions in object-oriented
CL_ABAP_REGEX
CL_ABAP_MATCHER
Remarks
正则表达式如果太复杂，会触发异常 CX_SY_REGEX_TOO_COMPLEX.
可以查看标准程序 DEMO_REGEX 和DEMO_REGEX_TOY用来测试正则表达式的查找和替换功能