enum class eTokenType {
    Keyword,      // GET, IN, FOR, CROSS, IF, ORDER, UNIQUE, AS, OR, AND, NOT,
                  // IN, MATCHES, BETWEEN, INCL, EXCL, INCL_L, INCL_R,
                  // MATCH, LEFT, RIGHT, FULL, ASC, DESC, NULL
    Identifier,   // name, age, test_table.id
    StringLit,    // "Alberto"
    NumberLit,    // 20, 1998
    Operator,     // == != < <= > >=
    Symbol,       // ( ) [ ] { } , . * ;
    EndOfInput
};

struct Token {
    eTokenType type;
    String value;       // raw text
    u32 line, col;      // for error reporting — add from day one, you'll regret skipping it
};