Add Result class inspired by Rust

CMakeLists.txt

@@ -56,6 +56,7 @@ add_executable(
     src/sapphirepch.h
     src/IRBuilder.cpp
     src/IRBuilder.h
+    src/Result.h
 )
 
 target_include_directories(sapphirec PUBLIC src)

src/Result.h

@@ -0,0 +1,36 @@
+#pragma once
+#include "Token.h"
+
+// Kinda copying Rust here, but it's a great idea.
+
+template<typename T>
+class Result
+{
+public:
+  Result() = default;
+  bool is_error() const { return m_is_error; }
+  void ethrow();
+  std::shared_ptr<T> get() { return m_result; }
+protected:
+  std::shared_ptr<Token> m_token;
+  std::shared_ptr<T> m_result;
+  bool m_is_error;
+  std::string m_error;
+  
+  Result(T* result, Token* token) : m_result(result), m_token(token) {}
+  Result(const std::string& error, Token* token) : m_error(std::move(error)), m_token(token) {}
+};
+
+template<typename T>
+class Ok : public Result<T>
+{
+public:
+  Ok(T* result, Token* token) : Result<T>(result,token) {}
+};
+
+template<typename T>
+class Err : public Result<T>
+{
+public:
+  Err(const std::string& error, Token* token) : Result<T>(std::move(error),token) {} 
+};