Boost regex incorrect syntax

Question

Hi,

I am using the Boost library under c++ to parse a load of text. I seem to be having a problem with this string

text text text Seat 6: player_name (11,111) text text text

I am trying to match on the middle bit, the seat number can be anything between 1 and 9, the player_name can be any character a-zA-Z and include numbers *_. and the value in the brackets can be 0 to 1,000,000 and should include ','

I have this regex which works in c# but won't work under boost, its not matching and I can't see why as in my RegexBuilder its coming back as correct:

Seat (?<seat_id>[0-9]): (?<player_name>[A-Z0-9]{1,}) (?<stack_size>\([0-9,]{1,}\))

Any ideas? I am going to leave out the <> because I am just going to match on the string and not worry about the individual values.

Thanks, R. Happy holloween.

Answer 1

You say the player name can include lowercase letters, but that's not what your code says. The code says player_name can only be numbers and uppercase letters. Perhaps in your C# code you set a flag to omit case-sensitivity from the check. In Boost, that's regex_constants::icase; use it when creating the regex object.

Also, remember that regex_match requires the expression to match the entire input string. If you want to know whether the regular expression matches anywhere in the input, then use regex_search instead.