Use plain C++ 03 to implement getStatsInfo.

paddle/gserver/evaluators/Evaluator.cpp

@@ -626,78 +626,34 @@ real PrecisionRecallEvaluator::evalImp(std::vector<Argument>& arguments) {
   return 0;
 }
 
-template <typename T1, typename T2>
-void PrecisionRecallEvaluator::printStatsHelper(T1 labelCallback,
-                                                T2 microAvgCallback) const {
-  int label = config_.positive_label();
-  if (label != -1) {
-    CHECK(label >= 0 && label < (int)statsInfo_.size())
-        << "positive_label [" << label << "] should be in range [0, "
-        << statsInfo_.size() << ")";
-    double precision =
-        calcPrecision(statsInfo_[label].TP, statsInfo_[label].FP);
-    double recall = calcRecall(statsInfo_[label].TP, statsInfo_[label].FN);
-    labelCallback(label, precision, recall, calcF1Score(precision, recall));
-    return;
-  }
-
-  // micro average method: precision = (TP1+TP2)/(TP1+FP1+TP2+FP2)
-  // macro average method: precision = (precision1+precision2)/2
-  double microTotalTP = 0;
-  double microTotalFP = 0;
-  double microTotalFN = 0;
-  double macroAvgPrecision = 0;
-  double macroAvgRecall = 0;
-  size_t numLabels = statsInfo_.size();
-  for (size_t i = 0; i < numLabels; ++i) {
-    microTotalTP += statsInfo_[i].TP;
-    microTotalFP += statsInfo_[i].FP;
-    microTotalFN += statsInfo_[i].FN;
-    macroAvgPrecision += calcPrecision(statsInfo_[i].TP, statsInfo_[i].FP);
-    macroAvgRecall += calcRecall(statsInfo_[i].TP, statsInfo_[i].FN);
-  }
-  macroAvgPrecision /= numLabels;
-  macroAvgRecall /= numLabels;
-  double macroAvgF1Score = calcF1Score(macroAvgPrecision, macroAvgRecall);
-
-  double microAvgPrecision = calcPrecision(microTotalTP, microTotalFP);
-  double microAvgRecall = calcPrecision(microTotalTP, microTotalFN);
-  double microAvgF1Score = calcF1Score(microAvgPrecision, microAvgRecall);
-
-  microAvgCallback(macroAvgPrecision,
-                   macroAvgRecall,
-                   macroAvgF1Score,
-                   isMultiBinaryLabel_,
-                   microAvgPrecision,
-                   microAvgRecall,
-                   microAvgF1Score);
-}
-
 void PrecisionRecallEvaluator::printStats(std::ostream& os) const {
-  this->printStatsHelper(
-      [&os](int label, double precision, double recall, double f1) {
-        os << "positive_label=" << label << " precision=" << precision
-           << " recall=" << recall << " F1-score=" << f1;
-      },
-      [&os](double macroAvgPrecision,
-            double macroAvgRecall,
-            double macroAvgF1Score,
-            bool isMultiBinaryLabel,
-            double microAvgPrecision,
-            double microAvgRecall,
-            double microAvgF1Score) {
-        os << "macro-average-precision=" << macroAvgPrecision
-           << " macro-average-recall=" << macroAvgRecall
-           << " macro-average-F1-score=" << macroAvgF1Score;
-        if (!isMultiBinaryLabel) {
-          // precision and recall are equal in this case
-          os << " micro-average-precision=" << microAvgPrecision;
-        } else {
-          os << " micro-average-precision=" << microAvgPrecision
-             << " micro-average-recall=" << microAvgRecall
-             << " micro-average-F1-score=" << microAvgF1Score;
-        }
-      });
+  double precision, recall, f1, macroAvgPrecision, macroAvgRecall,
+      macroAvgF1Score, microAvgPrecision, microAvgRecall, microAvgF1Score;
+  bool containMacroMicroInfo = getStatsInfo(&precision,
+                                            &recall,
+                                            &f1,
+                                            &macroAvgPrecision,
+                                            &macroAvgRecall,
+                                            &macroAvgF1Score,
+                                            &microAvgPrecision,
+                                            &microAvgRecall,
+                                            &microAvgF1Score);
+  os << "positive_label=" << config_.positive_label()
+     << " precision=" << precision << " recall=" << recall
+     << " F1-score=" << f1;
+  if (containMacroMicroInfo) {
+    os << "macro-average-precision=" << macroAvgPrecision
+       << " macro-average-recall=" << macroAvgRecall
+       << " macro-average-F1-score=" << macroAvgF1Score;
+    if (!isMultiBinaryLabel_) {
+      // precision and recall are equal in this case
+      os << " micro-average-precision=" << microAvgPrecision;
+    } else {
+      os << " micro-average-precision=" << microAvgPrecision
+         << " micro-average-recall=" << microAvgRecall
+         << " micro-average-F1-score=" << microAvgF1Score;
+    }
+  };
 }
 
 void PrecisionRecallEvaluator::calcStatsInfo(const MatrixPtr& output,
@@ -780,32 +736,33 @@ void PrecisionRecallEvaluator::calcStatsInfoMulti(const MatrixPtr& output,
 
 void PrecisionRecallEvaluator::storeLocalValues() const {
   if (this->values_.size() == 0) {
-    this->printStatsHelper(
-        [this](int label, double precision, double recall, double f1) {
-          values_["positive_label"] = (double)label;
-          values_["precision"] = precision;
-          values_["recal"] = recall;
-          values_["F1-score"] = f1;
-        },
-        [this](double macroAvgPrecision,
-               double macroAvgRecall,
-               double macroAvgF1Score,
-               bool isMultiBinaryLabel,
-               double microAvgPrecision,
-               double microAvgRecall,
-               double microAvgF1Score) {
-          values_["macro-average-precision"] = macroAvgPrecision;
-          values_["macro-average-recall"] = macroAvgRecall;
-          values_["macro-average-F1-score"] = macroAvgF1Score;
-          if (!isMultiBinaryLabel) {
-            // precision and recall are equal in this case
-            values_["micro-average-precision"] = microAvgPrecision;
-          } else {
-            values_["micro-average-precision"] = microAvgPrecision;
-            values_["micro-average-recall"] = microAvgRecall;
-            values_["micro-average-F1-score"] = microAvgF1Score;
-          }
-        });
+    double precision, recall, f1, macroAvgPrecision, macroAvgRecall,
+        macroAvgF1Score, microAvgPrecision, microAvgRecall, microAvgF1Score;
+    bool containMacroMicroInfo = getStatsInfo(&precision,
+                                              &recall,
+                                              &f1,
+                                              &macroAvgPrecision,
+                                              &macroAvgRecall,
+                                              &macroAvgF1Score,
+                                              &microAvgPrecision,
+                                              &microAvgRecall,
+                                              &microAvgF1Score);
+    values_["precision"] = precision;
+    values_["recal"] = recall;
+    values_["F1-score"] = f1;
+    if (containMacroMicroInfo) {
+      values_["macro-average-precision"] = macroAvgPrecision;
+      values_["macro-average-recall"] = macroAvgRecall;
+      values_["macro-average-F1-score"] = macroAvgF1Score;
+      if (!isMultiBinaryLabel_) {
+        // precision and recall are equal in this case
+        values_["micro-average-precision"] = microAvgPrecision;
+      } else {
+        values_["micro-average-precision"] = microAvgPrecision;
+        values_["micro-average-recall"] = microAvgRecall;
+        values_["micro-average-F1-score"] = microAvgF1Score;
+      }
+    }
   }
 }
 
@@ -865,6 +822,51 @@ void PrecisionRecallEvaluator::distributeEval(ParameterClient2* client) {
   delete[] buf;
 }
 
+bool PrecisionRecallEvaluator::getStatsInfo(double* precision,
+                                            double* recall,
+                                            double* f1,
+                                            double* macroAvgPrecision,
+                                            double* macroAvgRecall,
+                                            double* macroAvgF1Score,
+                                            double* microAvgPrecision,
+                                            double* microAvgRecall,
+                                            double* microAvgF1Score) const {
+  int label = config_.positive_label();
+  if (label != -1) {
+    CHECK(label >= 0 && label < (int)statsInfo_.size())
+        << "positive_label [" << label << "] should be in range [0, "
+        << statsInfo_.size() << ")";
+    *precision = calcPrecision(statsInfo_[label].TP, statsInfo_[label].FP);
+    *recall = calcRecall(statsInfo_[label].TP, statsInfo_[label].FN);
+    *f1 = calcF1Score(*precision, *recall);
+    return false;
+  }
+
+  // micro average method: precision = (TP1+TP2)/(TP1+FP1+TP2+FP2)
+  // macro average method: precision = (precision1+precision2)/2
+  double microTotalTP = 0;
+  double microTotalFP = 0;
+  double microTotalFN = 0;
+  *macroAvgPrecision = 0;
+  *macroAvgRecall = 0;
+  size_t numLabels = statsInfo_.size();
+  for (size_t i = 0; i < numLabels; ++i) {
+    microTotalTP += statsInfo_[i].TP;
+    microTotalFP += statsInfo_[i].FP;
+    microTotalFN += statsInfo_[i].FN;
+    *macroAvgPrecision += calcPrecision(statsInfo_[i].TP, statsInfo_[i].FP);
+    *macroAvgRecall += calcRecall(statsInfo_[i].TP, statsInfo_[i].FN);
+  }
+  *macroAvgPrecision /= numLabels;
+  *macroAvgRecall /= numLabels;
+  *macroAvgF1Score = calcF1Score(*macroAvgPrecision, *macroAvgRecall);
+
+  *microAvgPrecision = calcPrecision(microTotalTP, microTotalFP);
+  *microAvgRecall = calcPrecision(microTotalTP, microTotalFN);
+  *microAvgF1Score = calcF1Score(*microAvgPrecision, *microAvgRecall);
+  return true;
+}
+
 REGISTER_EVALUATOR(pnpair, PnpairEvaluator);
 void PnpairEvaluator::start() {
   Evaluator::start();

paddle/gserver/evaluators/Evaluator.h

@@ -125,7 +125,7 @@ public:
    * has multiple field, the name could be `evaluator_name.field1`. For example
    * the PrecisionRecallEvaluator contains `precision`, `recall` fields. The get
    * names will return `precision_recall_evaluator.precision`,
-   * `precision_recall.recal`, etc.
+   * `precision_recall_evaluator.recal`, etc.
    *
    * Also, if current Evaluator is a combined evaluator. getNames will return
    * all names of all evaluators inside the combined evaluator.
@@ -387,8 +387,15 @@ private:
   IVectorPtr cpuLabel_;
   MatrixPtr cpuWeight_;
 
-  template <typename T1, typename T2>
-  void printStatsHelper(T1 labelCallback, T2 microAvgCallback) const;
+  bool getStatsInfo(double* precision,
+                    double* recall,
+                    double* f1,
+                    double* macroAvgPrecision,
+                    double* macroAvgRecall,
+                    double* macroAvgF1Score,
+                    double* microAvgPrecision,
+                    double* microAvgRecall,
+                    double* microAvgF1Score) const;
 
   void calcStatsInfo(const MatrixPtr& output,
                      const IVectorPtr& label,

paddle/utils/Error.h

@@ -37,10 +37,10 @@ namespace paddle {
  *
  * Error __must_check bar() {
  *   // do something.
- *   Status s = foo();  // invoke other method return status.
- *   if (!s) return s;
+ *   Error err = foo();  // invoke other method return status.
+ *   if (err) return err;
  *   // do something else.
- *   return Status();
+ *   return Error();
  * }
  * @endcode{cpp}
  *
@@ -53,8 +53,8 @@ namespace paddle {
  *
  * int foo(Error* error) {
  *   // Do something.
- *   Error s = bar();
- *   if (!s) {
+ *   Error err = bar();
+ *   if (err) {
  *     *error = s;
  *     return 0;
  *   }
@@ -68,10 +68,10 @@ namespace paddle {
  * }
  *
  * Error foobar() {
- *   Error s;
+ *   Error err;
  *   // do something.
- *   foo(&s);
- *   if (!s) return s;
+ *   foo(&err);
+ *   if (err) return err;
  * }
  * @endcode{cpp}
  *
@@ -112,18 +112,22 @@ public:
   }
 
   /**
-   * @brief operator bool, return True if there is no error.
+   * @brief operator bool, return True if there is something error.
    */
-  operator bool() const { return msg_ == nullptr; }
+  operator bool() const { return !this->isOK(); }
 
-  bool isOK() const { return *this; }
+  /**
+   * @brief isOK return True if there is no error.
+   * @return True if no error.
+   */
+  bool isOK() const { return msg_ == nullptr; }
 
   /**
    * @brief check this status by glog.
    * @note It is a temp method used during cleaning Paddle code. It will be
    *       removed later.
    */
-  void check() const { CHECK(*this) << msg(); }
+  void check() const { CHECK(this->isOK()) << msg(); }
 
 private:
   std::shared_ptr<std::string> msg_;

paddle/utils/tests/test_Error.cpp

@@ -18,17 +18,17 @@ limitations under the License. */
 
 TEST(Error, testAll) {
   paddle::Error error;
-  ASSERT_TRUE(error);
-  error = paddle::Error("I'm the error");
   ASSERT_FALSE(error);
+  error = paddle::Error("I'm the error");
+  ASSERT_TRUE(error);
   ASSERT_STREQ("I'm the error", error.msg());
 
   error = paddle::Error("error2");
-  ASSERT_FALSE(error);
+  ASSERT_TRUE(error);
   ASSERT_STREQ("error2", error.msg());
 
   int i = 3;
   auto error3 = paddle::Error("error%d", i);
-  ASSERT_FALSE(error3);
+  ASSERT_TRUE(error3);
   ASSERT_STREQ("error3", error3.msg());
 }