From 537011df328c4f8899c3b4af409e5a5f0f682ba9 Mon Sep 17 00:00:00 2001
From: PuqiAR <PuqiAR@qq.com>
Date: Sun, 8 Feb 2026 13:27:59 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E6=94=B9LvObject=20set=E6=96=B9?=
 =?UTF-8?q?=E6=B3=95=EF=BC=8C=E5=85=88=E6=A3=80=E6=9F=A5=E6=98=AF=E5=90=A6?=
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---
 src/Evaluator/Value/LvObject.hpp | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/src/Evaluator/Value/LvObject.hpp b/src/Evaluator/Value/LvObject.hpp
index 002a4e6..4890089 100644
--- a/src/Evaluator/Value/LvObject.hpp
+++ b/src/Evaluator/Value/LvObject.hpp
@@ -80,6 +80,10 @@ namespace Fig
             if (kind == Kind::Variable)
             {
                 auto s = resolve(slot);
+                if (isAccessConst(s->am))
+                {
+                    throw RuntimeError(FString(std::format("Variable `{}` is immutable", s->name.toBasicString())));
+                }
                 if (!isTypeMatch(s->declaredType, v, ctx))
                 {
                     throw RuntimeError(
@@ -89,11 +93,6 @@ namespace Fig
                                         s->declaredType.toString().toBasicString(),
                                         prettyType(v).toBasicString())));
                 }
-                if (isAccessConst(s->am))
-                {
-                    throw RuntimeError(FString(
-                        std::format("Variable `{}` is immutable", s->name.toBasicString())));
-                }
                 s->value = v;
             }
             else if (kind == Kind::ListElement)