diff --git a/src/main.cpp b/src/main.cpp
new file mode 100644
index 0000000..797cb44
--- /dev/null
+++ b/src/main.cpp
@@ -0,0 +1,9 @@
+#include "token/type.hpp"
+
+#include <iostream>
+
+int main() {
+    auto eof = TokenType::ILLEGAL;
+    std::cout << eof << std::endl;
+    return 0;
+}
diff --git a/src/token/token.hpp b/src/token/token.hpp
new file mode 100644
index 0000000..4c4f3e5
--- /dev/null
+++ b/src/token/token.hpp
@@ -0,0 +1,10 @@
+#pragma once
+
+#include "type.hpp"
+
+#include <string>
+
+struct Token {
+    TokenType type;
+    std::string literal;
+};
diff --git a/src/token/type.hpp b/src/token/type.hpp
new file mode 100644
index 0000000..254c734
--- /dev/null
+++ b/src/token/type.hpp
@@ -0,0 +1,60 @@
+#pragma once
+
+#include <ostream>
+
+enum class TokenType {
+    ILLEGAL,
+    EOF_,
+
+    IDENT,
+    INT,
+
+    ASSIGN,
+    PLUS,
+
+    COMMA,
+    SEMICOLON,
+
+    LPAREN,
+    RPAREN,
+    LBRACE,
+    RBRACE,
+
+    FUNCTION,
+    LET
+};
+
+inline std::ostream& operator<<(std::ostream& os, TokenType tt) {
+    switch (tt) {
+    case TokenType::ILLEGAL:
+        return os << "ILLEGAL";
+    case TokenType::EOF_:
+        return os << "EOF";
+    case TokenType::IDENT:
+        return os << "IDENT";
+    case TokenType::INT:
+        return os << "INT";
+    case TokenType::ASSIGN:
+        return os << "=";
+    case TokenType::PLUS:
+        return os << "+";
+    case TokenType::COMMA:
+        return os << ",";
+    case TokenType::SEMICOLON:
+        return os << ";";
+    case TokenType::LPAREN:
+        return os << "(";
+    case TokenType::RPAREN:
+        return os << ")";
+    case TokenType::LBRACE:
+        return os << "{";
+    case TokenType::RBRACE:
+        return os << "}";
+    case TokenType::FUNCTION:
+        return os << "FUNCTION";
+    case TokenType::LET:
+        return os << "LET";
+    default:
+        return os << "Unknown";
+    }
+}