Cpp_Regex.zip <https://drive.google.com/file/d/1kISsPjp5XecBiZF7wU1crfx8revFgqMZ/view?usp=drive_web> Hello, Thank you for your support. I have attached the sample application. In that sample application I want to do regex match for 'Lo' unicode category so please let me know how to access a character class. As you said we need to built ICU externally as this is prerequisite, I had followed your step to install ICU and then move to boost, both are located in Local Disk C. Here when I install boost on executing the following '.\b2' command : refer below figure : [image: image.png] Also I tried this in linux as well where I received 'has_icu_builds' as 'yes'. I followed the same process for windows as well but still I get 'has_icu_builds' as 'no'. So why this problem comes in windows. Kind Regards, Neha Patil. On Thu, Apr 27, 2023 at 10:24 AM Neha Patil <nehadpatil123@gmail.com> wrote:

Hello,

We are working with boost::regex library to have unicode support. I want to form a regex for validating unicode characters so I'm trying this with boost library.

I am facing an issue with a boost library with ICU support so please suggest me how to proceed with the boost with ICU support. PFA for this.

1. *has_icu_builds* is used to enable icu support. [image: image.png]

2. on *b2 install* no icu is there, please let me know the procedure of how to enable icu. [image: image.png]

Also I tried attaching the ICU library externally but it gives incorrect results for regex having character classes. PFA for this. [image: image.png][image: image.png]

*NOTE *: Using 'Lo' character class as this class supports unicase alphabets.

Kind Regards, Neha Patil.