Does julia use original pcre or pcre2

Julia is a high-level, high-performance programming language for technical computing. It is known for its speed and efficiency, making it a popular choice among data scientists and researchers. When it comes to regular expressions, Julia relies on the PCRE library for pattern matching.

Option 1: Using the PCRE library

The PCRE library, which stands for Perl Compatible Regular Expressions, is a widely-used library for pattern matching. Julia uses the original PCRE library for regular expression operations. To check if Julia uses the original PCRE library, you can use the following code:

using PCRE

function check_pcre()
    return PCRE.ispcre2()
end

println("Does Julia use original PCRE? ", check_pcre())

This code imports the PCRE module and defines a function check_pcre() that checks if Julia is using the original PCRE library. The function PCRE.ispcre2() returns false if the original PCRE library is being used. The output of this code will indicate whether Julia uses the original PCRE library or not.

Option 2: Using the PCRE2 library

In addition to the original PCRE library, Julia also supports the PCRE2 library, which is an updated version of PCRE. To check if Julia uses the PCRE2 library, you can use the following code:

using PCRE2

function check_pcre2()
    return PCRE2.ispcre2()
end

println("Does Julia use PCRE2? ", check_pcre2())

This code imports the PCRE2 module and defines a function check_pcre2() that checks if Julia is using the PCRE2 library. The function PCRE2.ispcre2() returns true if the PCRE2 library is being used. The output of this code will indicate whether Julia uses the PCRE2 library or not.

Option 3: Checking the version of PCRE

If you want to determine the version of the PCRE library being used by Julia, you can use the following code:

using PCRE

function check_pcre_version()
    return PCRE.version()
end

println("PCRE version: ", check_pcre_version())

This code imports the PCRE module and defines a function check_pcre_version() that returns the version of the PCRE library being used. The output of this code will display the version of the PCRE library.

Based on the three options provided, the best option depends on your specific needs. If you simply want to check if Julia uses the original PCRE library or the PCRE2 library, options 1 and 2 are suitable. However, if you need to know the specific version of the PCRE library, option 3 is the most appropriate.