First of all, I'm not an expert about regular expression syntax,
however I believe there might be some strange bug when using
ctRegex.
Consider the following code:
void main() {
import std.regex: ctRegex, matchFirst;
auto expression = ctRegex!("\bis\b");
auto match = matchFirst("This island is beautiful", expression);
if(match.empty) writeln("no match");
else writeln("match");
}
when I compile and run I get the output "no match".
Looking online I found this website
https://www.regular-expressions.info/wordboundaries.html where
they explain that the above regex should match that string.
So I don't understand what's wrong with my code.
P.S.: using regex instead of ctRegex doesn't solve the problem.
