#include #include #include // I *might* proceed to attempt to parse XML via regex. :x int main() { auto XMLvalidate = [](std::string s) { // validate comments s = std::regex_replace(s, std::regex(").)*-->"), " "); // validate single tags s = std::regex_replace(s, std::regex("<(\\w+)( \\w+ ?= ?\"(\\w| )*\")*\\/>"), " "); // validate XML body for (std::string t = ""; s != t; ) { t = s; // the ability to use \1 to refer to the first captured group is amazing // this makes sure that the parsed opening tag and closing tag refer to the same element s = std::regex_replace(s, std::regex("<(\\w+)( \\w+ ?= ?\"(\\w| )*\")*>(\\w| )*<\\/\\1>"), " "); } // if everything is parsed successfully, this should leave s with only a bunch of whitespaces s = std::regex_replace(s, std::regex(" +"), ""); return s.empty(); }; std::cout << std::boolalpha; std::cout << XMLvalidate("contentcontent") << "\n"; std::cout << XMLvalidate("") << "\n"; std::cout << XMLvalidate("content") << "\n"; std::cout << XMLvalidate("") << "\n"; std::cout << XMLvalidate("") << "\n"; std::cout << XMLvalidate("content") << "\n\n"; std::cout << XMLvalidate("") << "\n"; std::cout << XMLvalidate("stray") << "\n"; }

XML Validator