From b53c061f95c1e90c7ea05bcdd831d4f70a7337be Mon Sep 17 00:00:00 2001
From: Huamonarch <lanchao103@baosight.com>
Date: Fri, 15 May 2026 16:48:59 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20ExpressionEngine=20=E6=9E=84=E9=80=A0?=
 =?UTF-8?q?=E5=87=BD=E6=95=B0=E9=A2=84=E5=88=9D=E5=A7=8B=E5=8C=96=20mm=5Fv?=
 =?UTF-8?q?ars=EF=BC=88=E6=81=A2=E5=A4=8D=E5=8E=9F=20ExpModule::init()=20?=
 =?UTF-8?q?=E8=A1=8C=E4=B8=BA=EF=BC=89?=
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---
 eqpalg/utility/expression_engine.cpp | 28 +++++++++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

diff --git a/eqpalg/utility/expression_engine.cpp b/eqpalg/utility/expression_engine.cpp
index c1e8dd8..4687336 100644
--- a/eqpalg/utility/expression_engine.cpp
+++ b/eqpalg/utility/expression_engine.cpp
@@ -7,7 +7,33 @@
 
 ExpressionEngine::ExpressionEngine(std::map<std::string, double>& mm_vars,
                                    std::vector<std::string>& m_tags)
-    : mm_vars_(mm_vars), m_tags_(m_tags) {}
+    : mm_vars_(mm_vars), m_tags_(m_tags) {
+  // 预初始化变量，等效于原 ExpModule::init()：
+  // 确保 mm_vars 中有 tagN/pN/pvN/now 等键，防止后续表达式求值时变量缺失
+  if (!m_tags_.empty()) {
+    ensureVarCache(var_cache_, m_tags_.size());
+    auto now = std::chrono::system_clock::now();
+    for (size_t i = 0; i < m_tags_.size(); i++) {
+      double value = 0.0;
+      try {
+        value = SingletonTemplate<GlobaltemSharedMemory>::GetInstance()[m_tags_[i]];
+      } catch (...) {
+        value = 0.0;
+      }
+      mm_vars_[var_cache_.p_keys[i]] = value;
+      mm_vars_[var_cache_.tag_keys[i]] = value;
+      for (size_t j = 0; j < PV_NUM; j++) {
+        mm_vars_[var_cache_.pv_keys[i][j]] = value;
+      }
+    }
+    mm_vars_["now"] = std::chrono::duration_cast<std::chrono::milliseconds>(
+                          now.time_since_epoch())
+                          .count();
+    mm_vars_["stime"] = 0;
+    mm_vars_["etime"] = 0;
+    mm_vars_["time"] = 0;
+  }
+}
 
 // 惰性初始化 VarsCache（首次变量刷新时调用）
 static void ensureVarCache(VarsCache& vc, size_t tag_count) {