1 files changed, 7 insertions, 1 deletions
diff --git a/include/parser.hpp b/include/parser.hpp
index 02471d8..3f0032b 100644
--- a/include/parser.hpp
+++ b/include/parser.hpp
@@ -4,6 +4,7 @@
 
 #include <string>
 #include <vector>
+#include "expressions.hpp"
 #include "lexer.hpp"
 #ifndef PARSER_H
 #define PARSER_H
@@ -12,6 +13,11 @@ class Parser{
 private:
   std::string text;
   Lexer tokenizer;
+  std::vector<Expression *> tree_stack;
+  Token var{nil, "{}"};
+  void panic();
+  Expression *popStack();
+  Expression *newTree(token_type type);
   void setText(std::string text);
   void parseExpr();
   void parsePrimeExpr();
@@ -22,7 +28,7 @@ private:
   void parseFactor();
   bool checkToken(); // Checa el token actual del lexer.
 public:
-  void parse(std::string expr);
+  Expression *parse(std::string expr);
 };
 
 #endif /* PARSER_H */