feat(lexer): implementing assignements

src/lexer/lexer_utils.h

@@ -14,6 +14,9 @@ struct lexer_context
     // tells us if we only lexed digits in current token.
     bool only_digits;
 
+    // usefull to detect assignments, and syntax errors with '='.
+    int equal_count;
+
     struct token *previous_token;
     struct token *current_token;
 };
@@ -34,10 +37,13 @@ enum token_type
     // Blanks
     TOKEN_NULL = 0,
     TOKEN_EOF,
-    TOKEN_WORD,
     TOKEN_NEWLINE,
 
-    // SPecial characters
+    // words
+    TOKEN_WORD,
+    TOKEN_ASSIGNMENT_WORD,
+
+    // Special characters
     TOKEN_GRAVE,
     TOKEN_SEMICOLON,
     TOKEN_COMMENT,
@@ -87,12 +93,13 @@ struct token
  */
 bool is_special_char(char *stream, ssize_t i);
 
-/* @brief: return a newly allocated token, with the corresponding type.
+/* @brief: return a newly allocated token, with the type corresponding
+ *         to the context given in arguments.
  *         The data contains [size] char, starting from [begin].
  *
  * @return: NULL on error, a token otherwise.
  */
-struct token *new_token(char *begin, ssize_t size, bool only_digits);
+struct token *new_token(char *begin, ssize_t size, bool only_digits, int equal_count);
 
 /* @brief: frees the token given in argument
  */