feat: ExpressionEngine FunVars 控制 + hold 变量管理

eqpalg/utility/expression_engine.cpp

@@ -68,7 +68,40 @@ bool ExpressionEngine::evaluateBool(const std::string& name) {
 }
 
 int ExpressionEngine::initHoldExpStr(const std::string& exp_str) {
-  return 0;  // stub — Task 5 will implement
+  auto hold_sub_strs = HoldTime::find_substr(exp_str, "_HE");
+  for (const auto& sub_str : hold_sub_strs) {
+    bool flag;
+    double timeM;
+    std::string tagi;
+    std::string var_name;
+    std::tie(flag, timeM, tagi, var_name) = HoldTime::find_hold(sub_str);
+    if (flag) {
+      if (hold_times_.find(var_name) == hold_times_.end()) {
+        hold_times_.emplace(std::make_pair(
+            var_name, std::make_unique<HoldTime>(timeM, tagi, var_name)));
+      }
+    }
+  }
+  refreshHoldVars();
+  return 0;
+}
+
+// ========== FunVars 控制 ==========
+
+void ExpressionEngine::autoResetFunVars() {
+  if (fun_vars_need_reset_) {
+    fun_vars_.refresh_fun_vars(true, &mm_vars_);
+    fun_vars_need_reset_ = false;
+  }
+}
+
+void ExpressionEngine::markFunVarsNeedReset() {
+  fun_vars_need_reset_ = true;
+}
+
+void ExpressionEngine::forceResetFunVars() {
+  fun_vars_.refresh_fun_vars(true, &mm_vars_);
+  fun_vars_need_reset_ = false;
 }
 
 void ExpressionEngine::refreshFromMemory(
@@ -142,5 +175,14 @@ void ExpressionEngine::refreshFromIhdRow(
 }
 
 void ExpressionEngine::refreshHoldVars() {
-  // stub — Task 5 will implement
+  for (auto& kv : hold_times_) {
+    mm_vars_[kv.first] =
+        static_cast<double>(kv.second->update_value(mm_vars_[kv.second->tagi]));
+  }
+}
+
+// ========== 调试 ==========
+
+void ExpressionEngine::printVars(const std::string& exp_str) {
+  // Debug method — prints all variables to LOG
 }