Function is_space

src/parse/utils/string.h:204–212

    }

    bool is_space(char32_t c)
    {
      static const std::unordered_set<char32_t> unicode_spaces = {
        0x0009, 0x000A, 0x000B, 0x000C, 0x000D, 0x0020, 0x0085, 0x00A0,
        0x1680, 0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006,
        0x2007, 0x2008, 0x2009, 0x200A, 0x2028, 0x2029, 0x202F, 0x205F, 0x3000
      };
      return unicode_spaces.count(c) > 0;
    }
    
    bool is_space(const std::string& val)
    {