.

The kata is retired, so I'm retracting the suggestion

Fork which solves most of the issues below is ready, please review and approve, if no questions will be raised~

No tests of unmatched brackets like such: "]["

Solution like this which does not try to deal with non-bracket characters should not pass.

This is a duplicate of https://www.codewars.com/kata/valid-parentheses and many other similar katas.

Needs random tests.

In the EBNF you use parentheses (()), but elsewhere it's square brackets ([]). You might want to correct that.

Fixed. Thanks for reporting.

I encountered same issue

Hi VermillionAzure

Seem anything wrong with test case setup by default. I write function return false ( default one ) and get error while trying to test
bool accept_string(std::string str) { return false }

-isystem /runner/frameworks/cpp/  error: expected ';' after struct
}
 ^
 ;
1 error generated.

Thanks
TTin

.

This is my attempt at a recursive descent parser according to the EBNF grammar. I would be welcome to ideas on how to do this better.