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)

src/io/config.cpp

 #include <LightGBM/config.h>
 
 #include <LightGBM/utils/common.h>
-#include <LightGBM/utils/random.h>
 #include <LightGBM/utils/log.h>
+#include <LightGBM/utils/random.h>
 
-#include <vector>
-#include <string>
-#include <unordered_set>
-#include <algorithm>
 #include <limits>
 
 namespace LightGBM {

src/io/dataset.cpp

 #include <LightGBM/dataset.h>
+
 #include <LightGBM/feature_group.h>
+#include <LightGBM/utils/array_args.h>
 #include <LightGBM/utils/openmp_wrapper.h>
 #include <LightGBM/utils/threading.h>
-#include <LightGBM/utils/array_args.h>
 
+#include <limits>
 #include <chrono>
 #include <cstdio>
-#include <unordered_map>
-#include <limits>
-#include <memory>
-#include <vector>
-#include <utility>
-#include <string>
 #include <sstream>
+#include <unordered_map>
 
 namespace LightGBM {
 

src/io/dataset_loader.cpp

 #include <LightGBM/dataset_loader.h>
 
-#include <LightGBM/utils/openmp_wrapper.h>
-#include <LightGBM/utils/log.h>
-#include <LightGBM/utils/array_args.h>
-
 #include <LightGBM/network.h>
-
+#include <LightGBM/utils/array_args.h>
+#include <LightGBM/utils/log.h>
+#include <LightGBM/utils/openmp_wrapper.h>
 
 namespace LightGBM {
 

src/io/dense_bin.hpp

@@ -3,9 +3,9 @@
 
 #include <LightGBM/bin.h>
 
-#include <vector>
-#include <cstring>
 #include <cstdint>
+#include <cstring>
+#include <vector>
 
 namespace LightGBM {
 

src/io/dense_nbits_bin.hpp

@@ -3,9 +3,9 @@
 
 #include <LightGBM/bin.h>
 
-#include <vector>
-#include <cstring>
 #include <cstdint>
+#include <cstring>
+#include <vector>
 
 namespace LightGBM {
 

src/io/file_io.cpp

 #include <LightGBM/utils/file_io.h>
+
 #include <LightGBM/utils/log.h>
 
 #include <algorithm>
 #include <sstream>
 #include <unordered_map>
+
 #ifdef USE_HDFS
 #include <hdfs.h>
 #endif

src/io/json11.cpp

@@ -20,11 +20,12 @@
  */
 
 #include <LightGBM/json11.hpp>
+
+#include <limits>
 #include <cassert>
 #include <cmath>
-#include <cstdlib>
 #include <cstdio>
-#include <limits>
+#include <cstdlib>
 
 namespace json11 {
 

src/io/metadata.cpp

 #include <LightGBM/dataset.h>
-
 #include <LightGBM/utils/common.h>
 
-#include <vector>
 #include <string>
+#include <vector>
 
 namespace LightGBM {
 

src/io/ordered_sparse_bin.hpp

@@ -3,12 +3,12 @@
 
 #include <LightGBM/bin.h>
 
-#include <cstring>
+#include <algorithm>
 #include <cstdint>
-
-#include <vector>
+#include <cstring>
 #include <mutex>
-#include <algorithm>
+#include <utility>
+#include <vector>
 
 #include "sparse_bin.hpp"
 

src/io/parser.cpp

 #include "parser.hpp"
 
-#include <iostream>
+#include <string>
 #include <fstream>
 #include <functional>
+#include <iostream>
 #include <memory>
 
 namespace LightGBM {

src/io/parser.hpp

 #ifndef LIGHTGBM_IO_PARSER_HPP_
 #define LIGHTGBM_IO_PARSER_HPP_
-#include <LightGBM/dataset.h>
 
+#include <LightGBM/dataset.h>
 #include <LightGBM/utils/common.h>
 #include <LightGBM/utils/log.h>
 
-
 #include <unordered_map>
-#include <vector>
 #include <utility>
+#include <vector>
 
 namespace LightGBM {
 

src/io/sparse_bin.hpp

 #ifndef LIGHTGBM_IO_SPARSE_BIN_HPP_
 #define LIGHTGBM_IO_SPARSE_BIN_HPP_
 
-#include <LightGBM/utils/log.h>
-
 #include <LightGBM/bin.h>
-
+#include <LightGBM/utils/log.h>
 #include <LightGBM/utils/openmp_wrapper.h>
 
-#include <cstring>
-#include <cstdint>
 #include <limits>
+#include <algorithm>
+#include <cstdint>
+#include <cstring>
+#include <utility>
 #include <vector>
 
 namespace LightGBM {

src/io/tree.cpp

 #include <LightGBM/tree.h>
 
-#include <LightGBM/utils/threading.h>
-#include <LightGBM/utils/common.h>
-
 #include <LightGBM/dataset.h>
+#include <LightGBM/utils/common.h>
+#include <LightGBM/utils/threading.h>
 
-#include <sstream>
-#include <unordered_map>
 #include <functional>
-#include <vector>
-#include <string>
-#include <memory>
 #include <iomanip>
+#include <sstream>
 
 namespace LightGBM {
 

src/lightgbm_R.cpp

 #include <LightGBM/lightgbm_R.h>
 
+#include <LightGBM/utils/common.h>
 #include <LightGBM/utils/log.h>
 #include <LightGBM/utils/openmp_wrapper.h>
 #include <LightGBM/utils/text_reader.h>
-#include <LightGBM/utils/common.h>
 
-#include <vector>
 #include <string>
-#include <utility>
-#include <cstring>
 #include <cstdio>
-#include <sstream>
-#include <cstdint>
+#include <cstring>
 #include <memory>
-
+#include <sstream>
+#include <utility>
+#include <vector>
 
 #define COL_MAJOR (0)
 

src/main.cpp

-#include <iostream>
 #include <LightGBM/application.h>
 
+#include <iostream>
+
 int main(int argc, char** argv) {
   try {
     LightGBM::Application app(argc, argv);

src/metric/binary_metric.hpp

@@ -2,13 +2,13 @@
 #define LIGHTGBM_METRIC_BINARY_METRIC_HPP_
 
 #include <LightGBM/metric.h>
-
-#include <LightGBM/utils/log.h>
 #include <LightGBM/utils/common.h>
+#include <LightGBM/utils/log.h>
 
+#include <string>
 #include <algorithm>
-#include <vector>
 #include <sstream>
+#include <vector>
 
 namespace LightGBM {
 

src/metric/dcg_calculator.cpp

 #include <LightGBM/metric.h>
-
 #include <LightGBM/utils/log.h>
 
+#include <algorithm>
 #include <cmath>
-
 #include <vector>
-#include <algorithm>
 
 namespace LightGBM {
 

src/metric/map_metric.hpp

 #ifndef LIGHTGBM_METRIC_MAP_METRIC_HPP_
 #define LIGHTGBM_METRIC_MAP_METRIC_HPP_
-#include <LightGBM/metric.h>
 
+#include <LightGBM/metric.h>
 #include <LightGBM/utils/common.h>
 #include <LightGBM/utils/log.h>
-
 #include <LightGBM/utils/openmp_wrapper.h>
 
+#include <string>
+#include <algorithm>
 #include <sstream>
 #include <vector>
 

src/metric/metric.cpp

 #include <LightGBM/metric.h>
-#include "regression_metric.hpp"
+
 #include "binary_metric.hpp"
-#include "rank_metric.hpp"
 #include "map_metric.hpp"
 #include "multiclass_metric.hpp"
+#include "rank_metric.hpp"
+#include "regression_metric.hpp"
 #include "xentropy_metric.hpp"
 
 namespace LightGBM {

src/metric/multiclass_metric.hpp

@@ -2,10 +2,11 @@
 #define LIGHTGBM_METRIC_MULTICLASS_METRIC_HPP_
 
 #include <LightGBM/metric.h>
-
 #include <LightGBM/utils/log.h>
 
+#include <string>
 #include <cmath>
+#include <vector>
 
 namespace LightGBM {
 /*!