reworked includes in source files (#2066)

* added all necessary includes - fixed build/include_what_you_use error

* fixed the order of includes (build/include_order)

include/LightGBM/application.h

 #ifndef LIGHTGBM_APPLICATION_H_
 #define LIGHTGBM_APPLICATION_H_
 
-#include <LightGBM/meta.h>
 #include <LightGBM/config.h>
+#include <LightGBM/meta.h>
 
-#include <vector>
 #include <memory>
+#include <vector>
 
 namespace LightGBM {
 

include/LightGBM/bin.h

@@ -2,15 +2,15 @@
 #define LIGHTGBM_BIN_H_
 
 #include <LightGBM/meta.h>
-
 #include <LightGBM/utils/common.h>
 #include <LightGBM/utils/file_io.h>
 
-
-#include <vector>
+#include <limits>
+#include <string>
 #include <functional>
-#include <unordered_map>
 #include <sstream>
+#include <unordered_map>
+#include <vector>
 
 namespace LightGBM {
 

include/LightGBM/boosting.h

 #ifndef LIGHTGBM_BOOSTING_H_
 #define LIGHTGBM_BOOSTING_H_
 
-#include <LightGBM/meta.h>
 #include <LightGBM/config.h>
+#include <LightGBM/meta.h>
 
-#include <vector>
 #include <string>
 #include <map>
+#include <unordered_map>
+#include <vector>
 
 namespace LightGBM {
 

include/LightGBM/c_api.h

 #ifndef LIGHTGBM_C_API_H_
 #define LIGHTGBM_C_API_H_
 
+#include <LightGBM/export.h>
+
 #include <cstdint>
 #include <cstring>
 
@@ -12,8 +14,6 @@
 * The reason is because they are called frequently, the type-conversion on them maybe time cost.
 */
 
-#include <LightGBM/export.h>
-
 typedef void* DatasetHandle;
 typedef void* BoosterHandle;
 

include/LightGBM/config.h

 /// desc and descl2 fields must be written in reStructuredText format
-
 #ifndef LIGHTGBM_CONFIG_H_
 #define LIGHTGBM_CONFIG_H_
 
+#include <LightGBM/export.h>
+#include <LightGBM/meta.h>
 #include <LightGBM/utils/common.h>
 #include <LightGBM/utils/log.h>
 
-#include <LightGBM/meta.h>
-#include <LightGBM/export.h>
-
-#include <vector>
 #include <string>
-#include <unordered_map>
-#include <unordered_set>
 #include <algorithm>
 #include <memory>
+#include <unordered_map>
+#include <unordered_set>
+#include <vector>
 
 namespace LightGBM {
 

include/LightGBM/dataset.h

 #ifndef LIGHTGBM_DATASET_H_
 #define LIGHTGBM_DATASET_H_
 
-#include <LightGBM/utils/random.h>
-#include <LightGBM/utils/text_reader.h>
-#include <LightGBM/utils/openmp_wrapper.h>
-
-#include <LightGBM/meta.h>
 #include <LightGBM/config.h>
 #include <LightGBM/feature_group.h>
+#include <LightGBM/meta.h>
+#include <LightGBM/utils/openmp_wrapper.h>
+#include <LightGBM/utils/random.h>
+#include <LightGBM/utils/text_reader.h>
 
-#include <vector>
-#include <utility>
-#include <functional>
 #include <string>
-#include <unordered_set>
+#include <functional>
+#include <memory>
 #include <mutex>
+#include <unordered_set>
+#include <utility>
+#include <vector>
 
 namespace LightGBM {
 

include/LightGBM/dataset_loader.h

@@ -3,6 +3,10 @@
 
 #include <LightGBM/dataset.h>
 
+#include <string>
+#include <unordered_set>
+#include <vector>
+
 namespace LightGBM {
 
 class DatasetLoader {

include/LightGBM/feature_group.h

 #ifndef LIGHTGBM_FEATURE_GROUP_H_
 #define LIGHTGBM_FEATURE_GROUP_H_
 
-#include <LightGBM/utils/random.h>
-
-#include <LightGBM/meta.h>
 #include <LightGBM/bin.h>
+#include <LightGBM/meta.h>
+#include <LightGBM/utils/random.h>
 
 #include <cstdio>
 #include <memory>

include/LightGBM/json11.hpp

@@ -51,10 +51,11 @@
 #pragma once
 
 #include <string>
-#include <vector>
+#include <initializer_list>
 #include <map>
 #include <memory>
-#include <initializer_list>
+#include <utility>
+#include <vector>
 
 #ifdef _MSC_VER
     #if _MSC_VER <= 1800  // VS 2013

include/LightGBM/lightgbm_R.h

 #ifndef LIGHTGBM_R_H_
 #define LIGHTGBM_R_H_
 
-#include "R_object_helper.h"
-
-#include <cstdint>
 #include <LightGBM/c_api.h>
+#include <LightGBM/R_object_helper.h>
 
+#include <cstdint>
 
 /*!
 * \brief get string message of the last error

include/LightGBM/meta.h

 #ifndef LIGHTGBM_META_H_
 #define LIGHTGBM_META_H_
 
-#include <cstdint>
-
 #include <limits>
-#include <vector>
+#include <cstdint>
 #include <functional>
 #include <memory>
+#include <utility>
+#include <vector>
 
 namespace LightGBM {
 

include/LightGBM/metric.h

 #ifndef LIGHTGBM_METRIC_H_
 #define LIGHTGBM_METRIC_H_
 
-#include <LightGBM/utils/log.h>
-#include <LightGBM/utils/common.h>
-
-#include <LightGBM/meta.h>
 #include <LightGBM/config.h>
 #include <LightGBM/dataset.h>
+#include <LightGBM/meta.h>
 #include <LightGBM/objective_function.h>
+#include <LightGBM/utils/log.h>
+#include <LightGBM/utils/common.h>
 
+#include <string>
 #include <vector>
 
 namespace LightGBM {

include/LightGBM/network.h

 #ifndef LIGHTGBM_NETWORK_H_
 #define LIGHTGBM_NETWORK_H_
 
-#include <LightGBM/utils/log.h>
-
-#include <LightGBM/meta.h>
 #include <LightGBM/config.h>
+#include <LightGBM/meta.h>
+#include <LightGBM/utils/log.h>
 
 #include <functional>
-#include <vector>
 #include <memory>
+#include <vector>
 
 namespace LightGBM {
 

include/LightGBM/objective_function.h

 #ifndef LIGHTGBM_OBJECTIVE_FUNCTION_H_
 #define LIGHTGBM_OBJECTIVE_FUNCTION_H_
 
-#include <LightGBM/meta.h>
 #include <LightGBM/config.h>
 #include <LightGBM/dataset.h>
+#include <LightGBM/meta.h>
+
+#include <string>
 #include <functional>
 
 namespace LightGBM {

include/LightGBM/prediction_early_stop.h

 #ifndef LIGHTGBM_PREDICTION_EARLY_STOP_H_
 #define LIGHTGBM_PREDICTION_EARLY_STOP_H_
 
-#include <functional>
-#include <string>
-
 #include <LightGBM/export.h>
 
+#include <string>
+#include <functional>
+
 namespace LightGBM {
 
 struct PredictionEarlyStopInstance {

include/LightGBM/tree.h

 #ifndef LIGHTGBM_TREE_H_
 #define LIGHTGBM_TREE_H_
 
-#include <LightGBM/meta.h>
 #include <LightGBM/dataset.h>
+#include <LightGBM/meta.h>
 
 #include <string>
-#include <vector>
-#include <memory>
 #include <map>
+#include <memory>
+#include <unordered_map>
+#include <vector>
 
 namespace LightGBM {
 

include/LightGBM/tree_learner.h

 #ifndef LIGHTGBM_TREE_LEARNER_H_
 #define LIGHTGBM_TREE_LEARNER_H_
 
-
-#include <LightGBM/meta.h>
 #include <LightGBM/config.h>
-#include <LightGBM/json11.hpp>
+#include <LightGBM/meta.h>
 
+#include <string>
 #include <vector>
 
+#include <LightGBM/json11.hpp>
+
 using namespace json11;
 
 namespace LightGBM {

include/LightGBM/utils/array_args.h

 #ifndef LIGHTGBM_UTILS_ARRAY_AGRS_H_
 #define LIGHTGBM_UTILS_ARRAY_AGRS_H_
 
-#include <vector>
-#include <algorithm>
 #include <LightGBM/utils/openmp_wrapper.h>
 
+#include <algorithm>
+#include <utility>
+#include <vector>
+
 namespace LightGBM {
 
 /*!

include/LightGBM/utils/common.h

@@ -4,18 +4,20 @@
 #include <LightGBM/utils/log.h>
 #include <LightGBM/utils/openmp_wrapper.h>
 
-#include <cstdio>
+#include <limits>
 #include <string>
-#include <vector>
-#include <sstream>
-#include <cstdint>
 #include <algorithm>
 #include <cmath>
+#include <cstdint>
+#include <cstdio>
 #include <functional>
-#include <memory>
+#include <iomanip>
 #include <iterator>
+#include <memory>
+#include <sstream>
 #include <type_traits>
-#include <iomanip>
+#include <utility>
+#include <vector>
 
 #ifdef _MSC_VER
 #include "intrin.h"

include/LightGBM/utils/file_io.h

 #ifndef LIGHTGBM_UTILS_FILE_IO_H_
 #define LIGHTGBM_UTILS_FILE_IO_H_
 
-#include <memory>
-#include <iostream>
+#include <string>
 #include <cstdio>
 #include <cstdlib>
 #include <cstring>
+#include <iostream>
+#include <memory>
 
 namespace LightGBM {