1 files changed, 19 insertions, 9 deletions
diff --git a/include/lexer.hpp b/include/lexer.hpp
index 8d0d826..e674999 100644
--- a/include/lexer.hpp
+++ b/include/lexer.hpp
@@ -7,7 +7,14 @@
 #ifndef LEXER_H
 #define LEXER_H
 
-const std::string EMPTY_STRING = ""; 
+enum function_name{
+  sin,
+  cos,
+  tan,
+  csc,
+  sec,
+  ctg
+};
 
 enum token_type{
   sum,
@@ -17,29 +24,32 @@ enum token_type{
   power,
   variable,
   number,
-  sin,
-  cos,
-  tan,
   function,
   left_parens,
-  right_parens
+  right_parens,
+  nil
 };
 
 struct Token{
   token_type type;
   std::string value;
+  Token(token_type type, std::string value) : type(type), value(value){}
 };
 
 class Lexer{
 private:
+  char var_name;
   std::string text;
-  size_t txt_ptr;
+  size_t current_char;
   Token current_token;
-  void setCurrentToken(Token val);
+  bool matchFunction(std::string function_name);
+  std::string createNumber();
 public:
-  Lexer(std::string text);
-  void nextToken();
+  Lexer(std::string text = {});
+  void setText(std::string text);
   Token getCurrentToken();
+  Token match();
+  Token nextToken();
 };
 
 #endif /* LEXER_H */