Refactored arguments

include/cmd/args/arg_generic.hpp

@@ -0,0 +1,39 @@
+#pragma once
+
+#include <memory>
+
+#include "cmd/args/arg_base.hpp"
+#include "ast/ast_component.hpp"
+
+namespace fsh{
+
+template<typename T>
+class Argument : public _Argument {
+public:
+    static T& get(std::shared_ptr<_Argument> a) {
+       return std::dynamic_pointer_cast<Argument<T> >(a)->gvalue();
+    }
+
+    Argument() {} 
+
+    virtual void svalue(const std::string& val, const Lexer::TokenType& type) override;
+    virtual T& gvalue() {return value;}
+private:
+    bool is_string_literal; // Currently no getter
+    T value;
+};
+
+template<class T>
+void Argument<T>::svalue(const std::string& val, const Lexer::TokenType& type) {
+    if constexpr (std::is_same_v<T, std::string>) {
+        value = val;
+    } else {
+        std::stringstream ss_val(val);
+        if(!(ss_val >> value)) {
+            throw std::invalid_argument("Incorrect type");
+        }
+    }
+    is_string_literal = type == Lexer::TokenType::STRING_LITERAL; 
+}
+
+}