How do I get matches to ignore case

[wangfenggao]

RE2 re("hello");
RE2::FullMatch(“Hello”, re)
How do I get matches to ignore case

[junyer]

You can use (?i) in the pattern (https://github.com/google/re2/blob/master/re2/re2.h#L30) or unset case_sensitive in the options (https://github.com/google/re2/blob/master/re2/re2.h#L561-L562).

[wangfenggao]

thanks for your answer, and If I do it the second way, is it reasonable to do so：
RE2::Options options;
options.set_case_sensitive(false);
RE2(pattern, options);

[junyer]

Yes, that's right. (Although the third line of code is missing the variable name.)