feat(lexer): implementing assignements

src/parser/grammar_advanced.c

@@ -66,5 +66,17 @@ struct ast *parse_redirection(struct lexer_context *ctx)
 
 struct ast *parse_prefix(struct lexer_context *ctx)
 {
-    return parse_redirection(ctx);
+    struct token *token = TOKEN_PEEK();
+    if (token->type == TOKEN_ASSIGNMENT_WORD)
+    {
+        token = TOKEN_POP();
+        return ast_create_assignment_word(token->data);
+    }
+    else if (is_first(*token, RULE_REDIRECTION))
+        return parse_redirection(ctx);
+    else 
+    {
+        perror("Syntax error: expected a prefix (redirection or assignment)");
+        return NULL;
+    }
 }