added EQ and NEQ

src/lexer/lexer.cpp

@@ -14,12 +14,16 @@ namespace lexer {
 
         switch (c) {
         case '=':
+            if (input.peek() == '=')
+                return {token::type::EQ, std::string{c, (char) input.get()}};
             return {token::type::ASSIGN, c};
         case '+':
             return {token::type::PLUS, c};
         case '-':
             return {token::type::MINUS, c};
         case '!':
+            if (input.peek() == '=')
+                return {token::type::NEQ, std::string{c, (char) input.get()}};
             return {token::type::BANG, c};
         case '*':
             return {token::type::ASTERISK, c};

src/token/type.hpp

@@ -30,6 +30,8 @@ namespace token {
     X(ELSE, "ELSE")                                                            \
     X(TRUE, "TRUE")                                                            \
     X(FALSE, "FALSE")                                                          \
+    X(EQ, "==")                                                                \
+    X(NEQ, "!=")                                                               \
     X(RETURN, "RETURN")
 
     // Define the TokenType enum using the X-macro