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.

On 08/07/2018 10:37 PM, Ivo wrote:
> 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 expression = ctRegex!(`\bis\b`);

\b is bell escape code as per ASCII

On Sunday, 8 July 2018 at 10:58:24 UTC, rikki cattermole wrote:
> On 08/07/2018 10:37 PM, Ivo wrote:
>> 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 expression = ctRegex!(`\bis\b`);
>
> \b is bell escape code as per ASCII

Thanks a lot.
I forgot to put an r before the quotes. My silly mistake.