Add a character cast operator to tok in lex.hpp

Signed-off-by: Username404 <w.iron.zombie@gmail.com>

src/headers/lex.hpp

@@ -26,6 +26,7 @@ struct tok {
     tok() = delete;
     tok(const type& Type, std::string_view Text, const decltype(line)& line = 1): toktype(Type), toktext(Text), line(line) {}
     explicit tok(const type& Type, const decltype(line)& line = 1): tok(Type, std::string(1, Type), line) {};
+    operator char() const { return static_cast<char>(toktype); }
     friend std::ostream& operator<<(std::ostream& output, const tok& it) { return output << it.toktext; }
 };
 std::vector<tok> lex(const std::string& in);