json-validator/include/jvalidate/detail/regex_engine.h

#pragma once

#include <regex>
#include <string>
#include <unordered_map>

namespace jvalidate::detail {
class RegexEngine {
public:
  virtual ~RegexEngine() = default;
  virtual bool operator()(std::string const & regex, std::string const & text) = 0;
};

class StdRegexEngine final : public RegexEngine {
private:
  std::unordered_map<std::string, std::regex> cache_;

public:
  bool operator()(std::string const & regex, std::string const & text) {
    return std::regex_match(text, cache_.try_emplace(regex, regex).first->second);
  }
};
}