回档之后的重写。部分问题修复。添加了什么我也忘了

src/Evaluator/Core/EvalUnary.cpp

@@ -0,0 +1,31 @@
+#include <Evaluator/Value/LvObject.hpp>
+#include <Evaluator/evaluator.hpp>
+#include <Evaluator/evaluator_error.hpp>
+
+namespace Fig
+{
+    RvObject Evaluator::evalUnary(Ast::UnaryExpr un, ContextPtr ctx)
+    {
+        using Ast::Operator;
+        Operator op = un->op;
+        Ast::Expression exp = un->exp;
+        ObjectPtr value = eval(exp, ctx);
+        switch (op)
+        {
+            case Operator::Not: {
+                return std::make_shared<Object>(!(*value));
+            }
+            case Operator::Subtract: {
+                return std::make_shared<Object>(-(*value));
+            }
+            case Operator::BitNot: {
+                return std::make_shared<Object>(bit_not((*value)));
+            }
+            default: {
+                throw EvaluatorError(u8"UnsupportedOpError",
+                                     std::format("Unsupported op '{}' for unary expression", magic_enum::enum_name(op)),
+                                     un);
+            }
+        }
+    }
+};