diff --git a/.gitignore b/.gitignore
index 096eb1d..f5c757a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,3 @@
-.vscode/
+/.vscode
 build/
-.idea
+
diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..13566b8
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 0000000..53624c9
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="MakefileSettings">
+    <option name="linkedExternalProjectsSettings">
+      <MakefileProjectSettings>
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+          </set>
+        </option>
+        <option name="version" value="2" />
+      </MakefileProjectSettings>
+    </option>
+  </component>
+  <component name="MakefileWorkspace" PROJECT_DIR="$PROJECT_DIR$" />
+</project>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..35eb1dd
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/headers/ASTPrinter.h b/headers/ASTPrinter.h
index fbcda39..5fff0b2 100644
--- a/headers/ASTPrinter.h
+++ b/headers/ASTPrinter.h
@@ -13,6 +13,6 @@ public:
     int test = 10;
     std::string print(Expr<std::string>* expr);
 private:
-    std::string parenthesize(std::string name,  std::vector<std::shared_ptr<Expr<std::string> > > exprs);
+    std::string parenthesize(std::string name,  std::vector<std::shared_ptr<Expr<std::string>>> exprs);
 
 };
\ No newline at end of file
diff --git a/headers/Expression.h b/headers/Expression.h
index b2ae208..9e00c8c 100644
--- a/headers/Expression.h
+++ b/headers/Expression.h
@@ -18,11 +18,11 @@ struct Expr{
 template <typename T>
 struct BinaryExpr : Expr<T>
 {
-    const std::shared_ptr<Expr<T> > left;
+    const std::shared_ptr<Expr<T>> left;
     const Token oper;
-    const std::shared_ptr<Expr<T> > right;
+    const std::shared_ptr<Expr<T>> right;
 
-    BinaryExpr(std::shared_ptr<Expr<T> > left, Token oper, std::shared_ptr<Expr<T> > right) : left(left), oper(oper), right(right)
+    BinaryExpr(std::shared_ptr<Expr<T>> left, Token oper, std::shared_ptr<Expr<T> > right) : left(left), oper(oper), right(right)
     {
     }
     T accept(Visitor<T>* visitor) override{
@@ -32,9 +32,9 @@ struct BinaryExpr : Expr<T>
 template <typename T>
 struct GroupingExpr : Expr<T>
 {
-    const std::shared_ptr<Expr<T> > expression;
+    const std::shared_ptr<Expr<T>> expression;
 
-    GroupingExpr(std::shared_ptr<Expr<T> > expression) : expression(expression)
+    GroupingExpr(std::shared_ptr<Expr<T>> expression) : expression(expression)
     {
     }
     T accept(Visitor<T>* visitor) override{
@@ -57,9 +57,9 @@ template <typename T>
 struct UnaryExpr : Expr<T>
 {
     const Token oper;
-    const std::shared_ptr<Expr<T> > right;
+    const std::shared_ptr<Expr<T>> right;
 
-    UnaryExpr(Token oper, std::shared_ptr<Expr<T> > right) : oper(oper), right(right)
+    UnaryExpr(Token oper, std::shared_ptr<Expr<T>> right) : oper(oper), right(right)
     {
     }
     T accept(Visitor<T>* visitor) override{
diff --git a/headers/TypeWrapper.h b/headers/TypeWrapper.h
new file mode 100644
index 0000000..8145cbc
--- /dev/null
+++ b/headers/TypeWrapper.h
@@ -0,0 +1,18 @@
+#pragma once
+#include <string>
+struct Object
+{
+    virtual ~Object(){};
+};
+
+struct Number : public Object
+{
+    double value;
+    explicit Number(double value) : value(value) {}
+};
+
+struct String : public Object
+{
+    std::string value;
+    explicit String(std::string str) : value(str) {}
+};
\ No newline at end of file
diff --git a/source/ASTPrinter.cpp b/source/ASTPrinter.cpp
index 3d7e6dd..9a99dc7 100644
--- a/source/ASTPrinter.cpp
+++ b/source/ASTPrinter.cpp
@@ -6,29 +6,29 @@
 
 std::string ASTPrinter::visitBinaryExpr(BinaryExpr<std::string>* expression){
     std::cout << expression->left << std::endl;
-    return parenthesize(expression->oper.lexeme, std::vector<std::shared_ptr<Expr<std::string> > >{expression->left, expression->right});
+    return parenthesize(expression->oper.lexeme, std::vector<std::shared_ptr<Expr<std::string>>>{expression->left, expression->right});
 }
 
 std::string ASTPrinter::visitGroupingExpr(GroupingExpr<std::string>* expression){
-    return parenthesize("group", std::vector<std::shared_ptr<Expr<std::string> > >{expression->expression});
+    return parenthesize("group", std::vector<std::shared_ptr<Expr<std::string>>>{expression->expression});
 }
 std::string ASTPrinter::visitLiteralExpr(LiteralExpr<std::string>* expression){
     return expression->value;
 }
 std::string ASTPrinter::visitUnaryExpr(UnaryExpr<std::string>* expression){
-    return parenthesize(expression->oper.lexeme, std::vector<std::shared_ptr<Expr<std::string> > >{expression->right});
+    return parenthesize(expression->oper.lexeme, std::vector<std::shared_ptr<Expr<std::string>>>{expression->right});
 }
 
 std::string ASTPrinter::print(Expr<std::string> *expr) {
     return expr->accept(this);
 }
 
-std::string ASTPrinter::parenthesize(std::string name, std::vector<std::shared_ptr<Expr<std::string> > > exprs) {
+std::string ASTPrinter::parenthesize(std::string name, std::vector<std::shared_ptr<Expr<std::string>>> exprs) {
     std::string builder;
 
     builder += "(" + name;
 
-    for(std::shared_ptr<Expr<std::string> > expr : exprs)
+    for(std::shared_ptr<Expr<std::string>> expr : exprs)
     {
         std::cout << expr << std::endl;
 
diff --git a/source/main.cpp b/source/main.cpp
index 0592045..6af5ec5 100644
--- a/source/main.cpp
+++ b/source/main.cpp
@@ -7,6 +7,7 @@
 #include "../headers/Expression.h"
 #include "../headers/Lexer.h"
 #include "../headers/ASTPrinter.h"
+#include "../headers/TypeWrapper.h"
 int main(){
 
     Bob bobLang;
@@ -15,14 +16,14 @@ int main(){
 
     ASTPrinter printer;
 
-    std::shared_ptr<Expr<std::string> > expression = std::make_shared<BinaryExpr<std::string> >(
-            std::make_shared<UnaryExpr<std::string> >(
+    std::shared_ptr<Expr<std::string>> expression = std::make_shared<BinaryExpr<std::string> >(
+            std::make_shared<UnaryExpr<std::string>>(
                     Token{MINUS, "-", 1},
                     std::make_shared<LiteralExpr<std::string>>("123", true)
                     ),
             Token{STAR, "*", 1},
-            std::make_shared<GroupingExpr<std::string> >(
-                    std::make_shared<LiteralExpr<std::string> >("45.67", true)
+            std::make_shared<GroupingExpr<std::string>>(
+                    std::make_shared<LiteralExpr<std::string>>("45.67", true)
                     )
             );
 
@@ -39,5 +40,15 @@ int main(){
 
     //bobLang.runPrompt();
 
+    std::shared_ptr<Object> object = std::make_shared<String>(String{"Hi"});
+
+    if(auto num = std::dynamic_pointer_cast<Number>(object))
+    {
+        std::cout << num->value << std::endl;
+    }else if(auto str = std::dynamic_pointer_cast<String>(object))
+    {
+        std::cout << str->value << std::endl;
+    }
+
     return 0;
 }