feat(sem)常量浮点类型隐式转换为整型

src/sem/SymbolTable.cpp

@@ -620,11 +620,16 @@ std::vector<SymbolTable::ConstValue> SymbolTable::EvaluateConstInitVal(
         if (base_type->IsInt32() && val.kind == ConstValue::FLOAT) {
             throw std::runtime_error("整型常量不能使用浮点常量初始化");
         }
+        */
+        // 隐式类型转换
+        if (base_type->IsInt32() && val.kind == ConstValue::FLOAT) {
+            val.kind = ConstValue::INT;
+            val.float_val = static_cast<int>(val.int_val);
+        }
         if (base_type->IsFloat() && val.kind == ConstValue::INT) {
             val.kind = ConstValue::FLOAT;
             val.float_val = static_cast<float>(val.int_val);
         }
-        */
         return {val};  // 返回包含单个值的向量
     }