text: #pragma once
  #include <cstddef>
  
  namespace swizzle { namespace lexer {
      class TokenInfo;
  }}
  
  namespace swizzle { namespace lexer { namespace utils {
  
      // return difference between end of @top and end of @info.
      std::size_t calculateColumnDifference(const TokenInfo& info, const TokenInfo& top);
  }}}
  