ECMAScript Regex for a multilined string

Question

I am writing the loading procedure for my application and it involves reading data from a file and creating an appropriate object with appropriate properties.

The file c

Answer 1

Your problem is quite simpler than it looks. This:

const std::regex regexTest( "=== ([^=]+) ===\\n((?:.|\\n)*)\\n=== END \\1 ===" );

worked perfectly on clang++/libc++. It seems that \n does not fit into [] brackets in ECMAscript regexen. Remember to use while regex_search instead of if regex_match if you want to look for more than one instance of the regex inside the string!

Answer 2

Try to use:

1. lazy quantifiers:

   === (.+?) ===\\n([\\s\\S]*?)\\n=== END \\1 ===

2. negative classes and negative lookaheads:

   === ((?:[^ ]+| (?!===))+) ===\\n((?:[^\\n]+|\\n(?!=== END \\1 ===))*)

3. POSIX:

   === (.+?) ===\n((.|\n)*?)\n=== END [^=]+? ===