[VER] 0.3.7-alpha

[Fix] 修复科学表达式数字解析的问题（Lexer引起） 由 Satklomi发现，感谢
[Feat] 增加Compiler相关定义，将开发BytecodeVM
[Tip] Evaluator进入Bug fix阶段，新功能延缓开发。转向VM

src/Evaluator/Value/structInstance.hpp

@@ -0,0 +1,32 @@
+#pragma once
+
+#include <Context/context_forward.hpp>
+#include <Value/Type.hpp>
+
+namespace Fig
+{
+    struct StructInstance
+    {
+        TypeInfo parentType;
+        ContextPtr localContext;
+
+        // ===== Constructors =====
+        StructInstance(TypeInfo _parentType, ContextPtr _localContext) :
+            parentType(_parentType), localContext(std::move(_localContext)) {}
+
+        StructInstance(const StructInstance &other) = default;
+        StructInstance(StructInstance &&) noexcept = default;
+        StructInstance &operator=(const StructInstance &) = default;
+        StructInstance &operator=(StructInstance &&) noexcept = default;
+
+        // ===== Comparison =====
+        bool operator==(const StructInstance &other) const noexcept
+        {
+            return parentType == other.parentType && localContext == other.localContext;
+        }
+        bool operator!=(const StructInstance &other) const noexcept
+        {
+            return !(*this == other);
+        }
+    };
+} // namespace Fig