[Feat] 详细区分左值(LvObject)与右值(RvObject -> ObjectPtr)

[Impl] 重构evaluator.cpp + hpp 全部
[Feat] 增加对于IndexExpr的解析
[Fix][Impl] 现在点运算符不由BinaryExpr负责,增加MemberExpr,单独实现解析
[Impl] 项目目录全部翻修, src/目录下单独文件夹放置每一个模块

src/Value/structType.hpp

@@ -0,0 +1,67 @@
+#pragma once
+
+#include <Core/fig_string.hpp>
+#include <Ast/Statements/StructDefSt.hpp>
+
+#include <Value/Type.hpp>
+
+#include <Context/context_forward.hpp>
+#include <atomic>
+#include <vector>
+
+namespace Fig
+{
+    struct Field
+    {
+        AccessModifier am;
+        FString name;
+        TypeInfo type;
+        Ast::Expression defaultValue;
+
+        Field(AccessModifier _am, FString _name, TypeInfo _type, Ast::Expression _defaultValue) :
+            am(_am), name(std::move(_name)), type(std::move(_type)), defaultValue(std::move(_defaultValue)) {}
+
+        bool isPublic() const
+        {
+            return am == AccessModifier::Public || am == AccessModifier::PublicConst;
+        }
+        bool isConst() const
+        {
+            return am == AccessModifier::Const || am == AccessModifier::PublicConst;
+        }
+
+    };
+
+    struct StructType
+    {
+        std::size_t id;
+        ContextPtr defContext; // 定义时的上下文
+        std::vector<Field> fields;
+
+        // ===== Constructors =====
+        StructType(ContextPtr _defContext, std::vector<Field> _fields) :
+            id(nextId()), defContext(std::move(_defContext)), fields(std::move(_fields)) {}
+
+        StructType(const StructType &other) = default;
+        StructType(StructType &&) noexcept = default;
+        StructType &operator=(const StructType &) = default;
+        StructType &operator=(StructType &&) noexcept = default;
+
+        // ===== Comparison =====
+        bool operator==(const StructType &other) const noexcept
+        {
+            return id == other.id;
+        }
+        bool operator!=(const StructType &other) const noexcept
+        {
+            return !(*this == other);
+        }
+
+    private:
+        static std::size_t nextId()
+        {
+            static std::atomic<std::size_t> counter{1};
+            return counter++;
+        }
+    };
+} // namespace Fig