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fix warnings #3399

Merged
merged 7 commits into from
Sep 29, 2020
Merged

fix warnings #3399

merged 7 commits into from
Sep 29, 2020

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guolinke
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to fix #3394

@StrikerRUS
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@guolinke
Looks like one warning about type casting still remains in this branch:

C:\Users\ntitov\Downloads\LightGBM\src\io\dataset.cpp(380): warning C4800: 'signed char': forcing value to bool 'true' or 'false' (performance warning) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxpr
oj]

C:\Users\ntitov\Downloads\LightGBM\build>cmake --build . --target ALL_BUILD --config Release
Microsoft (R) Build Engine version 14.0.25420.1
Copyright (C) Microsoft Corporation. All rights reserved.

  Checking Build System
  Building Custom Rule C:/Users/ntitov/Downloads/LightGBM/CMakeLists.txt
  application.cpp
  boosting.cpp
  gbdt.cpp
  gbdt_model_text.cpp
  gbdt_prediction.cpp
  prediction_early_stop.cpp
  bin.cpp
  config.cpp
  config_auto.cpp
  dataset.cpp
  dataset_loader.cpp
  file_io.cpp
  json11.cpp
c:\users\ntitov\downloads\lightgbm\src\boosting\prediction_early_stop.cpp(88): warning C4702: unreachable code [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
  metadata.cpp
C:\Users\ntitov\Downloads\LightGBM\src\io\dataset.cpp(380): warning C4800: 'signed char': forcing value to bool 'true' or 'false' (performance warning) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxpr
oj]
c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(355): warning C4100: 'max_bin': unreferenced formal parameter (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp) [C:\Users\ntitov
\Downloads\LightGBM\build\_lightgbm.vcxproj]
  c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(407): note: see reference to function template instantiation 'LightGBM::data_size_t LightGBM::SparseBin<uint32_t>::SplitCategoricalInner<false>(uint32
  _t,uint32_t,uint32_t,const uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' being compiled (compiling source file C:\Users\ntitov\Dow
  nloads\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(405): note: see reference to function template instantiation 'LightGBM::data_size_t LightGBM::SparseBin<uint32_t>::SplitCategoricalInner<false>(uint32
  _t,uint32_t,uint32_t,const uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' being compiled (compiling source file C:\Users\ntitov\Dow
  nloads\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(404): note: while compiling class template member function 'LightGBM::data_size_t LightGBM::SparseBin<uint32_t>::SplitCategorical(uint32_t,uint32_t,co
  nst uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp)
  C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp(629): note: see reference to class template instantiation 'LightGBM::SparseBin<uint32_t>' being compiled
c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(310): warning C4100: 'max_bin': unreferenced formal parameter (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp) [C:\Users\ntitov\
Downloads\LightGBM\build\_lightgbm.vcxproj]
  c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(362): note: see reference to function template instantiation 'LightGBM::data_size_t LightGBM::DenseBin<uint32_t,false>::SplitCategoricalInner<false>(ui
  nt32_t,uint32_t,uint32_t,const uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' being compiled (compiling source file C:\Users\ntitov
  \Downloads\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(360): note: see reference to function template instantiation 'LightGBM::data_size_t LightGBM::DenseBin<uint32_t,false>::SplitCategoricalInner<false>(ui
  nt32_t,uint32_t,uint32_t,const uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' being compiled (compiling source file C:\Users\ntitov
  \Downloads\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(359): note: while compiling class template member function 'LightGBM::data_size_t LightGBM::DenseBin<uint32_t,false>::SplitCategorical(uint32_t,uint32_
  t,const uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp)
  C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp(625): note: see reference to class template instantiation 'LightGBM::DenseBin<uint32_t,false>' being compiled
  parser.cpp
  tree.cpp
  dcg_calculator.cpp
  metric.cpp
  linker_topo.cpp
  linkers_mpi.cpp
  linkers_socket.cpp
  network.cpp
  objective_function.cpp
  data_parallel_tree_learner.cpp
  feature_parallel_tree_learner.cpp
  gpu_tree_learner.cpp
  serial_tree_learner.cpp
  tree_learner.cpp
  voting_parallel_tree_learner.cpp
  c_api.cpp
c:\users\ntitov\downloads\lightgbm\src\objective\objective_function.cpp(52): warning C4702: unreachable code [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
c:\users\ntitov\downloads\lightgbm\src\c_api.cpp(879): warning C4702: unreachable code [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
c:\users\ntitov\downloads\lightgbm\src\treelearner\serial_tree_learner.cpp(233): warning C4702: unreachable code [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
     Creating library C:/Users/ntitov/Downloads/LightGBM/Release/lib_lightgbm.lib and object C:/Users/ntitov/Downloads/LightGBM/Release/lib_lightgbm.exp
  _lightgbm.vcxproj -> C:\Users\ntitov\Downloads\LightGBM\Release\lib_lightgbm.dll
  Building Custom Rule C:/Users/ntitov/Downloads/LightGBM/CMakeLists.txt
  main.cpp
  application.cpp
  boosting.cpp
  gbdt.cpp
  gbdt_model_text.cpp
  gbdt_prediction.cpp
  prediction_early_stop.cpp
  bin.cpp
  config.cpp
  config_auto.cpp
  dataset.cpp
  dataset_loader.cpp
C:\Users\ntitov\Downloads\LightGBM\src\io\dataset.cpp(380): warning C4800: 'signed char': forcing value to bool 'true' or 'false' (performance warning) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxpro
j]
c:\users\ntitov\downloads\lightgbm\src\boosting\prediction_early_stop.cpp(88): warning C4702: unreachable code [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
  file_io.cpp
c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(355): warning C4100: 'max_bin': unreferenced formal parameter (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp) [C:\Users\ntitov
\Downloads\LightGBM\build\lightgbm.vcxproj]
  c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(407): note: see reference to function template instantiation 'LightGBM::data_size_t LightGBM::SparseBin<uint32_t>::SplitCategoricalInner<false>(uint32
  _t,uint32_t,uint32_t,const uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' being compiled (compiling source file C:\Users\ntitov\Dow
  nloads\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(405): note: see reference to function template instantiation 'LightGBM::data_size_t LightGBM::SparseBin<uint32_t>::SplitCategoricalInner<false>(uint32
  _t,uint32_t,uint32_t,const uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' being compiled (compiling source file C:\Users\ntitov\Dow
  nloads\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(404): note: while compiling class template member function 'LightGBM::data_size_t LightGBM::SparseBin<uint32_t>::SplitCategorical(uint32_t,uint32_t,co
  nst uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp)
  C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp(629): note: see reference to class template instantiation 'LightGBM::SparseBin<uint32_t>' being compiled
c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(310): warning C4100: 'max_bin': unreferenced formal parameter (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp) [C:\Users\ntitov\
Downloads\LightGBM\build\lightgbm.vcxproj]
  c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(362): note: see reference to function template instantiation 'LightGBM::data_size_t LightGBM::DenseBin<uint32_t,false>::SplitCategoricalInner<false>(ui
  nt32_t,uint32_t,uint32_t,const uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' being compiled (compiling source file C:\Users\ntitov
  \Downloads\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(360): note: see reference to function template instantiation 'LightGBM::data_size_t LightGBM::DenseBin<uint32_t,false>::SplitCategoricalInner<false>(ui
  nt32_t,uint32_t,uint32_t,const uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' being compiled (compiling source file C:\Users\ntitov
  \Downloads\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(359): note: while compiling class template member function 'LightGBM::data_size_t LightGBM::DenseBin<uint32_t,false>::SplitCategorical(uint32_t,uint32_
  t,const uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp)
  C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp(625): note: see reference to class template instantiation 'LightGBM::DenseBin<uint32_t,false>' being compiled
  json11.cpp
  metadata.cpp
  parser.cpp
  tree.cpp
  dcg_calculator.cpp
  metric.cpp
  linker_topo.cpp
  linkers_mpi.cpp
  linkers_socket.cpp
  network.cpp
  objective_function.cpp
  data_parallel_tree_learner.cpp
  feature_parallel_tree_learner.cpp
  gpu_tree_learner.cpp
  serial_tree_learner.cpp
  tree_learner.cpp
  voting_parallel_tree_learner.cpp
c:\users\ntitov\downloads\lightgbm\src\objective\objective_function.cpp(52): warning C4702: unreachable code [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
c:\users\ntitov\downloads\lightgbm\src\treelearner\serial_tree_learner.cpp(233): warning C4702: unreachable code [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
     Creating library C:/Users/ntitov/Downloads/LightGBM/Release/lightgbm.lib and object C:/Users/ntitov/Downloads/LightGBM/Release/lightgbm.exp
  lightgbm.vcxproj -> C:\Users\ntitov\Downloads\LightGBM\Release\lightgbm.exe
  Building Custom Rule C:/Users/ntitov/Downloads/LightGBM/CMakeLists.txt

guolinke
guolinke commented Sep 20, 2020
View reviewed changes
src/io/dataset.cpp Outdated Show resolved Hide resolved
@StrikerRUS
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@guolinke More warnings about int8 to bool conversion:

C:\Users\ntitov\Downloads\LightGBM\build>cmake --build . --target ALL_BUILD --config Release
Microsoft (R) Build Engine version 14.0.25420.1
Copyright (C) Microsoft Corporation. All rights reserved.

  Checking Build System
  Building Custom Rule C:/Users/ntitov/Downloads/LightGBM/CMakeLists.txt
  application.cpp
  boosting.cpp
  gbdt.cpp
  gbdt_model_text.cpp
  gbdt_prediction.cpp
  prediction_early_stop.cpp
  bin.cpp
  config.cpp
  config_auto.cpp
  dataset.cpp
  dataset_loader.cpp
  file_io.cpp
c:\users\ntitov\downloads\lightgbm\src\boosting\prediction_early_stop.cpp(88): warning C4702: unreachable code [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
  json11.cpp
  metadata.cpp
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\boosting\gbdt_model_text.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\boosting\boosting.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\io\dataset_loader.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\application\application.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\boosting\gbdt.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\boosting\gbdt_prediction.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\io\dataset.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\io\metadata.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(355): warning C4100: 'max_bin': unreferenced formal parameter (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp) [C:\Users\ntitov\D
ownloads\LightGBM\build\_lightgbm.vcxproj]
  c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(407): note: see reference to function template instantiation 'LightGBM::data_size_t LightGBM::SparseBin<uint32_t>::SplitCategoricalInner<false>(uint32_t
  ,uint32_t,uint32_t,const uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' being compiled (compiling source file C:\Users\ntitov\Downloa
  ds\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(405): note: see reference to function template instantiation 'LightGBM::data_size_t LightGBM::SparseBin<uint32_t>::SplitCategoricalInner<false>(uint32_t
  ,uint32_t,uint32_t,const uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' being compiled (compiling source file C:\Users\ntitov\Downloa
  ds\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(404): note: while compiling class template member function 'LightGBM::data_size_t LightGBM::SparseBin<uint32_t>::SplitCategorical(uint32_t,uint32_t,cons
  t uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp)
  C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp(629): note: see reference to class template instantiation 'LightGBM::SparseBin<uint32_t>' being compiled
c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(310): warning C4100: 'max_bin': unreferenced formal parameter (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp) [C:\Users\ntitov\Do
wnloads\LightGBM\build\_lightgbm.vcxproj]
  c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(362): note: see reference to function template instantiation 'LightGBM::data_size_t LightGBM::DenseBin<uint32_t,false>::SplitCategoricalInner<false>(uint
  32_t,uint32_t,uint32_t,const uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' being compiled (compiling source file C:\Users\ntitov\Dow
  nloads\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(360): note: see reference to function template instantiation 'LightGBM::data_size_t LightGBM::DenseBin<uint32_t,false>::SplitCategoricalInner<false>(uint
  32_t,uint32_t,uint32_t,const uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' being compiled (compiling source file C:\Users\ntitov\Dow
  nloads\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(359): note: while compiling class template member function 'LightGBM::data_size_t LightGBM::DenseBin<uint32_t,false>::SplitCategorical(uint32_t,uint32_t,
  const uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp)
  C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp(625): note: see reference to class template instantiation 'LightGBM::DenseBin<uint32_t,false>' being compiled
  parser.cpp
  tree.cpp
  dcg_calculator.cpp
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\io\parser.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
  metric.cpp
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\io\tree.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\metric\dcg_calculator.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
  linker_topo.cpp
  linkers_mpi.cpp
  linkers_socket.cpp
  network.cpp
  objective_function.cpp
  data_parallel_tree_learner.cpp
  feature_parallel_tree_learner.cpp
  gpu_tree_learner.cpp
  serial_tree_learner.cpp
  tree_learner.cpp
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\metric\metric.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\objective\objective_function.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\treelearner\data_parallel_tree_learner.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\treelearner\feature_parallel_tree_learner.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
  voting_parallel_tree_learner.cpp
  c_api.cpp
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\treelearner\serial_tree_learner.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\treelearner\tree_learner.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\c_api.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\treelearner\voting_parallel_tree_learner.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
c:\users\ntitov\downloads\lightgbm\src\objective\objective_function.cpp(52): warning C4702: unreachable code [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
c:\users\ntitov\downloads\lightgbm\src\c_api.cpp(879): warning C4702: unreachable code [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
c:\users\ntitov\downloads\lightgbm\src\treelearner\serial_tree_learner.cpp(233): warning C4702: unreachable code [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
     Creating library C:/Users/ntitov/Downloads/LightGBM/Release/lib_lightgbm.lib and object C:/Users/ntitov/Downloads/LightGBM/Release/lib_lightgbm.exp
  _lightgbm.vcxproj -> C:\Users\ntitov\Downloads\LightGBM\Release\lib_lightgbm.dll
  Building Custom Rule C:/Users/ntitov/Downloads/LightGBM/CMakeLists.txt
  main.cpp
  application.cpp
  boosting.cpp
  gbdt.cpp
  gbdt_model_text.cpp
  gbdt_prediction.cpp
  prediction_early_stop.cpp
  bin.cpp
  config.cpp
  config_auto.cpp
  dataset.cpp
  dataset_loader.cpp
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\application\application.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\boosting\gbdt_prediction.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\boosting\boosting.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\io\dataset.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\boosting\gbdt_model_text.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\io\dataset_loader.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\boosting\gbdt.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
c:\users\ntitov\downloads\lightgbm\src\boosting\prediction_early_stop.cpp(88): warning C4702: unreachable code [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
  file_io.cpp
c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(355): warning C4100: 'max_bin': unreferenced formal parameter (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp) [C:\Users\ntitov\D
ownloads\LightGBM\build\lightgbm.vcxproj]
  c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(407): note: see reference to function template instantiation 'LightGBM::data_size_t LightGBM::SparseBin<uint32_t>::SplitCategoricalInner<false>(uint32_t
  ,uint32_t,uint32_t,const uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' being compiled (compiling source file C:\Users\ntitov\Downloa
  ds\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(405): note: see reference to function template instantiation 'LightGBM::data_size_t LightGBM::SparseBin<uint32_t>::SplitCategoricalInner<false>(uint32_t
  ,uint32_t,uint32_t,const uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' being compiled (compiling source file C:\Users\ntitov\Downloa
  ds\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(404): note: while compiling class template member function 'LightGBM::data_size_t LightGBM::SparseBin<uint32_t>::SplitCategorical(uint32_t,uint32_t,cons
  t uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp)
  C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp(629): note: see reference to class template instantiation 'LightGBM::SparseBin<uint32_t>' being compiled
c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(310): warning C4100: 'max_bin': unreferenced formal parameter (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp) [C:\Users\ntitov\Do
wnloads\LightGBM\build\lightgbm.vcxproj]
  c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(362): note: see reference to function template instantiation 'LightGBM::data_size_t LightGBM::DenseBin<uint32_t,false>::SplitCategoricalInner<false>(uint
  32_t,uint32_t,uint32_t,const uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' being compiled (compiling source file C:\Users\ntitov\Dow
  nloads\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(360): note: see reference to function template instantiation 'LightGBM::data_size_t LightGBM::DenseBin<uint32_t,false>::SplitCategoricalInner<false>(uint
  32_t,uint32_t,uint32_t,const uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' being compiled (compiling source file C:\Users\ntitov\Dow
  nloads\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(359): note: while compiling class template member function 'LightGBM::data_size_t LightGBM::DenseBin<uint32_t,false>::SplitCategorical(uint32_t,uint32_t,
  const uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp)
  C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp(625): note: see reference to class template instantiation 'LightGBM::DenseBin<uint32_t,false>' being compiled
  json11.cpp
  metadata.cpp
  parser.cpp
  tree.cpp
  dcg_calculator.cpp
  metric.cpp
  linker_topo.cpp
  linkers_mpi.cpp
  linkers_socket.cpp
  network.cpp
  objective_function.cpp
  data_parallel_tree_learner.cpp
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\io\metadata.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\io\parser.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\metric\dcg_calculator.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\io\tree.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\metric\metric.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
  feature_parallel_tree_learner.cpp
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\objective\objective_function.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\treelearner\data_parallel_tree_learner.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
  gpu_tree_learner.cpp
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\treelearner\feature_parallel_tree_learner.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
  serial_tree_learner.cpp
  tree_learner.cpp
  voting_parallel_tree_learner.cpp
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\treelearner\serial_tree_learner.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\treelearner\tree_learner.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
C:\Users\ntitov\Downloads\LightGBM\include\LightGBM/feature_group.h(32): warning C4800: 'int8_t': forcing value to bool 'true' or 'false' (performance warning) (compiling source file C:\Users\ntitov\Downloads\Li
ghtGBM\src\treelearner\voting_parallel_tree_learner.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
c:\users\ntitov\downloads\lightgbm\src\objective\objective_function.cpp(52): warning C4702: unreachable code [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
c:\users\ntitov\downloads\lightgbm\src\treelearner\serial_tree_learner.cpp(233): warning C4702: unreachable code [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
     Creating library C:/Users/ntitov/Downloads/LightGBM/Release/lightgbm.lib and object C:/Users/ntitov/Downloads/LightGBM/Release/lightgbm.exp
  lightgbm.vcxproj -> C:\Users\ntitov\Downloads\LightGBM\Release\lightgbm.exe
  Building Custom Rule C:/Users/ntitov/Downloads/LightGBM/CMakeLists.txt

@StrikerRUS
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StrikerRUS commented Sep 27, 2020 •
edited
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@guolinke Thank you! I can confirm that warnings about int -> bool conversion have gone.

Could you please take a look at two new warnings (one about double -> int conversion is presented in master branch CI) to fix all of them at once?

c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(873): warning C4189: 'constraint_update_necess
ary': local variable is initialized but not referenced (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\tr
eelearner\tree_learner.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]

c:\users\ntitov\downloads\lightgbm\src\metric\multiclass_metric.hpp(339): warning C4244: 'argument': conversion from 'd
ouble' to 'unsigned __int64', possible loss of data (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\metri
c\metric.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]

Full log:

C:\Users\ntitov\Downloads\LightGBM\build>cmake --build . --target ALL_BUILD --config Release
Microsoft (R) Build Engine version 14.0.25420.1
Copyright (C) Microsoft Corporation. All rights reserved.

  Checking Build System
  Building Custom Rule C:/Users/ntitov/Downloads/LightGBM/CMakeLists.txt
  application.cpp
  boosting.cpp
  gbdt.cpp
  gbdt_model_text.cpp
  gbdt_prediction.cpp
  prediction_early_stop.cpp
  bin.cpp
  config.cpp
  config_auto.cpp
  dataset.cpp
  dataset_loader.cpp
  file_io.cpp
  json11.cpp
c:\users\ntitov\downloads\lightgbm\src\boosting\prediction_early_stop.cpp(88): warning C4702: unreachable code [C:\User
s\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
  metadata.cpp
c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(355): warning C4100: 'max_bin': unreferenced formal parameter
(compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_li
ghtgbm.vcxproj]
  c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(407): note: see reference to function template instantiation
   'LightGBM::data_size_t LightGBM::SparseBin<uint32_t>::SplitCategoricalInner<false>(uint32_t,uint32_t,uint32_t,const
  uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) c
  onst' being compiled (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(405): note: see reference to function template instantiation
   'LightGBM::data_size_t LightGBM::SparseBin<uint32_t>::SplitCategoricalInner<false>(uint32_t,uint32_t,uint32_t,const
  uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) c
  onst' being compiled (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(404): note: while compiling class template member function '
  LightGBM::data_size_t LightGBM::SparseBin<uint32_t>::SplitCategorical(uint32_t,uint32_t,const uint32_t *,int,const Li
  ghtGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' (compiling source
   file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp)
  C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp(629): note: see reference to class template instantiation 'LightGBM
  ::SparseBin<uint32_t>' being compiled
c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(311): warning C4100: 'max_bin': unreferenced formal parameter (
compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lig
htgbm.vcxproj]
  c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(363): note: see reference to function template instantiation
  'LightGBM::data_size_t LightGBM::DenseBin<uint32_t,false>::SplitCategoricalInner<false>(uint32_t,uint32_t,uint32_t,co
  nst uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t
  *) const' being compiled (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(361): note: see reference to function template instantiation
  'LightGBM::data_size_t LightGBM::DenseBin<uint32_t,false>::SplitCategoricalInner<false>(uint32_t,uint32_t,uint32_t,co
  nst uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t
  *) const' being compiled (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(360): note: while compiling class template member function 'L
  ightGBM::data_size_t LightGBM::DenseBin<uint32_t,false>::SplitCategorical(uint32_t,uint32_t,const uint32_t *,int,cons
  t LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' (compiling so
  urce file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp)
  C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp(625): note: see reference to class template instantiation 'LightGBM
  ::DenseBin<uint32_t,false>' being compiled
  parser.cpp
  tree.cpp
  dcg_calculator.cpp
  metric.cpp
  linker_topo.cpp
  linkers_mpi.cpp
  linkers_socket.cpp
  network.cpp
  objective_function.cpp
  cuda_tree_learner.cpp
  data_parallel_tree_learner.cpp
c:\users\ntitov\downloads\lightgbm\src\metric\multiclass_metric.hpp(339): warning C4244: 'argument': conversion from 'd
ouble' to 'unsigned __int64', possible loss of data (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\metri
c\metric.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
  feature_parallel_tree_learner.cpp
  gpu_tree_learner.cpp
  serial_tree_learner.cpp
  tree_learner.cpp
  voting_parallel_tree_learner.cpp
  c_api.cpp
c:\users\ntitov\downloads\lightgbm\src\objective\objective_function.cpp(52): warning C4702: unreachable code [C:\Users\
ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(873): warning C4189: 'constraint_update_necess
ary': local variable is initialized but not referenced (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\tr
eelearner\feature_parallel_tree_learner.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(175): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FindBestThresholdSequentially<true,false,true,true,true,true,true,
  false>(double,double,LightGBM::data_size_t,const LightGBM::FeatureConstraint *,double,LightGBM::SplitInfo *,int,doubl
  e)' being compiled (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\feature_parallel_tree_le
  arner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(150): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL3<true,false,true,true,true>(void)' being compiled
   (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\feature_parallel_tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(134): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL2<true,false,true,true>(void)' being compiled (com
  piling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\feature_parallel_tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(118): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL1<true,false>(void)' being compiled (compiling sou
  rce file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\feature_parallel_tree_learner.cpp)
c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(873): warning C4189: 'constraint_update_necess
ary': local variable is initialized but not referenced (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\tr
eelearner\data_parallel_tree_learner.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(175): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FindBestThresholdSequentially<true,false,true,true,true,true,true,
  false>(double,double,LightGBM::data_size_t,const LightGBM::FeatureConstraint *,double,LightGBM::SplitInfo *,int,doubl
  e)' being compiled (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\data_parallel_tree_learn
  er.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(150): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL3<true,false,true,true,true>(void)' being compiled
   (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\data_parallel_tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(134): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL2<true,false,true,true>(void)' being compiled (com
  piling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\data_parallel_tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(118): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL1<true,false>(void)' being compiled (compiling sou
  rce file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\data_parallel_tree_learner.cpp)
c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(873): warning C4189: 'constraint_update_necess
ary': local variable is initialized but not referenced (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\tr
eelearner\tree_learner.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(175): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FindBestThresholdSequentially<true,false,true,true,true,true,true,
  false>(double,double,LightGBM::data_size_t,const LightGBM::FeatureConstraint *,double,LightGBM::SplitInfo *,int,doubl
  e)' being compiled (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(150): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL3<true,false,true,true,true>(void)' being compiled
   (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(134): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL2<true,false,true,true>(void)' being compiled (com
  piling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(118): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL1<true,false>(void)' being compiled (compiling sou
  rce file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\tree_learner.cpp)
c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(873): warning C4189: 'constraint_update_necess
ary': local variable is initialized but not referenced (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\tr
eelearner\serial_tree_learner.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(175): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FindBestThresholdSequentially<true,false,true,true,true,true,true,
  false>(double,double,LightGBM::data_size_t,const LightGBM::FeatureConstraint *,double,LightGBM::SplitInfo *,int,doubl
  e)' being compiled (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\serial_tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(150): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL3<true,false,true,true,true>(void)' being compiled
   (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\serial_tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(134): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL2<true,false,true,true>(void)' being compiled (com
  piling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\serial_tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(118): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL1<true,false>(void)' being compiled (compiling sou
  rce file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\serial_tree_learner.cpp)
c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(873): warning C4189: 'constraint_update_necess
ary': local variable is initialized but not referenced (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\tr
eelearner\voting_parallel_tree_learner.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(175): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FindBestThresholdSequentially<true,false,true,true,true,true,true,
  false>(double,double,LightGBM::data_size_t,const LightGBM::FeatureConstraint *,double,LightGBM::SplitInfo *,int,doubl
  e)' being compiled (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\voting_parallel_tree_lea
  rner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(150): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL3<true,false,true,true,true>(void)' being compiled
   (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\voting_parallel_tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(134): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL2<true,false,true,true>(void)' being compiled (com
  piling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\voting_parallel_tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(118): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL1<true,false>(void)' being compiled (compiling sou
  rce file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\voting_parallel_tree_learner.cpp)
c:\users\ntitov\downloads\lightgbm\src\c_api.cpp(891): warning C4702: unreachable code [C:\Users\ntitov\Downloads\Light
GBM\build\_lightgbm.vcxproj]
c:\users\ntitov\downloads\lightgbm\src\treelearner\serial_tree_learner.cpp(233): warning C4702: unreachable code [C:\Us
ers\ntitov\Downloads\LightGBM\build\_lightgbm.vcxproj]
     Creating library C:/Users/ntitov/Downloads/LightGBM/Release/lib_lightgbm.lib and object C:/Users/ntitov/Downloads/
  LightGBM/Release/lib_lightgbm.exp
  _lightgbm.vcxproj -> C:\Users\ntitov\Downloads\LightGBM\Release\lib_lightgbm.dll
  Building Custom Rule C:/Users/ntitov/Downloads/LightGBM/CMakeLists.txt
  main.cpp
  application.cpp
  boosting.cpp
  gbdt.cpp
  gbdt_model_text.cpp
  gbdt_prediction.cpp
  prediction_early_stop.cpp
  bin.cpp
  config.cpp
  config_auto.cpp
  dataset.cpp
  dataset_loader.cpp
c:\users\ntitov\downloads\lightgbm\src\boosting\prediction_early_stop.cpp(88): warning C4702: unreachable code [C:\User
s\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
  file_io.cpp
c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(355): warning C4100: 'max_bin': unreferenced formal parameter
(compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lig
htgbm.vcxproj]
  c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(407): note: see reference to function template instantiation
   'LightGBM::data_size_t LightGBM::SparseBin<uint32_t>::SplitCategoricalInner<false>(uint32_t,uint32_t,uint32_t,const
  uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) c
  onst' being compiled (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(405): note: see reference to function template instantiation
   'LightGBM::data_size_t LightGBM::SparseBin<uint32_t>::SplitCategoricalInner<false>(uint32_t,uint32_t,uint32_t,const
  uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) c
  onst' being compiled (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\sparse_bin.hpp(404): note: while compiling class template member function '
  LightGBM::data_size_t LightGBM::SparseBin<uint32_t>::SplitCategorical(uint32_t,uint32_t,const uint32_t *,int,const Li
  ghtGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' (compiling source
   file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp)
  C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp(629): note: see reference to class template instantiation 'LightGBM
  ::SparseBin<uint32_t>' being compiled
c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(311): warning C4100: 'max_bin': unreferenced formal parameter (
compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\ligh
tgbm.vcxproj]
  c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(363): note: see reference to function template instantiation
  'LightGBM::data_size_t LightGBM::DenseBin<uint32_t,false>::SplitCategoricalInner<false>(uint32_t,uint32_t,uint32_t,co
  nst uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t
  *) const' being compiled (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(361): note: see reference to function template instantiation
  'LightGBM::data_size_t LightGBM::DenseBin<uint32_t,false>::SplitCategoricalInner<false>(uint32_t,uint32_t,uint32_t,co
  nst uint32_t *,int,const LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t
  *) const' being compiled (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp)
  c:\users\ntitov\downloads\lightgbm\src\io\dense_bin.hpp(360): note: while compiling class template member function 'L
  ightGBM::data_size_t LightGBM::DenseBin<uint32_t,false>::SplitCategorical(uint32_t,uint32_t,const uint32_t *,int,cons
  t LightGBM::data_size_t *,LightGBM::data_size_t,LightGBM::data_size_t *,LightGBM::data_size_t *) const' (compiling so
  urce file C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp)
  C:\Users\ntitov\Downloads\LightGBM\src\io\bin.cpp(625): note: see reference to class template instantiation 'LightGBM
  ::DenseBin<uint32_t,false>' being compiled
  json11.cpp
  metadata.cpp
  parser.cpp
  tree.cpp
  dcg_calculator.cpp
  metric.cpp
  linker_topo.cpp
  linkers_mpi.cpp
  linkers_socket.cpp
  network.cpp
  objective_function.cpp
c:\users\ntitov\downloads\lightgbm\src\metric\multiclass_metric.hpp(339): warning C4244: 'argument': conversion from 'd
ouble' to 'unsigned __int64', possible loss of data (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\metri
c\metric.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
  cuda_tree_learner.cpp
  data_parallel_tree_learner.cpp
  feature_parallel_tree_learner.cpp
  gpu_tree_learner.cpp
  serial_tree_learner.cpp
  tree_learner.cpp
  voting_parallel_tree_learner.cpp
c:\users\ntitov\downloads\lightgbm\src\objective\objective_function.cpp(52): warning C4702: unreachable code [C:\Users\
ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(873): warning C4189: 'constraint_update_necess
ary': local variable is initialized but not referenced (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\tr
eelearner\feature_parallel_tree_learner.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(175): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FindBestThresholdSequentially<true,false,true,true,true,true,true,
  false>(double,double,LightGBM::data_size_t,const LightGBM::FeatureConstraint *,double,LightGBM::SplitInfo *,int,doubl
  e)' being compiled (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\feature_parallel_tree_le
  arner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(150): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL3<true,false,true,true,true>(void)' being compiled
   (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\feature_parallel_tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(134): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL2<true,false,true,true>(void)' being compiled (com
  piling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\feature_parallel_tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(118): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL1<true,false>(void)' being compiled (compiling sou
  rce file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\feature_parallel_tree_learner.cpp)
c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(873): warning C4189: 'constraint_update_necess
ary': local variable is initialized but not referenced (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\tr
eelearner\data_parallel_tree_learner.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(175): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FindBestThresholdSequentially<true,false,true,true,true,true,true,
  false>(double,double,LightGBM::data_size_t,const LightGBM::FeatureConstraint *,double,LightGBM::SplitInfo *,int,doubl
  e)' being compiled (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\data_parallel_tree_learn
  er.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(150): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL3<true,false,true,true,true>(void)' being compiled
   (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\data_parallel_tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(134): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL2<true,false,true,true>(void)' being compiled (com
  piling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\data_parallel_tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(118): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL1<true,false>(void)' being compiled (compiling sou
  rce file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\data_parallel_tree_learner.cpp)
c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(873): warning C4189: 'constraint_update_necess
ary': local variable is initialized but not referenced (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\tr
eelearner\serial_tree_learner.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(175): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FindBestThresholdSequentially<true,false,true,true,true,true,true,
  false>(double,double,LightGBM::data_size_t,const LightGBM::FeatureConstraint *,double,LightGBM::SplitInfo *,int,doubl
  e)' being compiled (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\serial_tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(150): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL3<true,false,true,true,true>(void)' being compiled
   (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\serial_tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(134): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL2<true,false,true,true>(void)' being compiled (com
  piling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\serial_tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(118): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL1<true,false>(void)' being compiled (compiling sou
  rce file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\serial_tree_learner.cpp)
c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(873): warning C4189: 'constraint_update_necess
ary': local variable is initialized but not referenced (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\tr
eelearner\voting_parallel_tree_learner.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(175): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FindBestThresholdSequentially<true,false,true,true,true,true,true,
  false>(double,double,LightGBM::data_size_t,const LightGBM::FeatureConstraint *,double,LightGBM::SplitInfo *,int,doubl
  e)' being compiled (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\voting_parallel_tree_lea
  rner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(150): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL3<true,false,true,true,true>(void)' being compiled
   (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\voting_parallel_tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(134): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL2<true,false,true,true>(void)' being compiled (com
  piling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\voting_parallel_tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(118): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL1<true,false>(void)' being compiled (compiling sou
  rce file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\voting_parallel_tree_learner.cpp)
c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(873): warning C4189: 'constraint_update_necess
ary': local variable is initialized but not referenced (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\tr
eelearner\tree_learner.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(175): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FindBestThresholdSequentially<true,false,true,true,true,true,true,
  false>(double,double,LightGBM::data_size_t,const LightGBM::FeatureConstraint *,double,LightGBM::SplitInfo *,int,doubl
  e)' being compiled (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(150): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL3<true,false,true,true,true>(void)' being compiled
   (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(134): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL2<true,false,true,true>(void)' being compiled (com
  piling source file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\tree_learner.cpp)
  c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(118): note: see reference to function templa
  te instantiation 'void LightGBM::FeatureHistogram::FuncForNumricalL1<true,false>(void)' being compiled (compiling sou
  rce file C:\Users\ntitov\Downloads\LightGBM\src\treelearner\tree_learner.cpp)
c:\users\ntitov\downloads\lightgbm\src\treelearner\serial_tree_learner.cpp(233): warning C4702: unreachable code [C:\Us
ers\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]
     Creating library C:/Users/ntitov/Downloads/LightGBM/Release/lightgbm.lib and object C:/Users/ntitov/Downloads/Ligh
  tGBM/Release/lightgbm.exp
  lightgbm.vcxproj -> C:\Users\ntitov\Downloads\LightGBM\Release\lightgbm.exe
  Building Custom Rule C:/Users/ntitov/Downloads/LightGBM/CMakeLists.txt

@guolinke
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@StrikerRUS

c:\users\ntitov\downloads\lightgbm\src\treelearner\feature_histogram.hpp(873): warning C4189: 'constraint_update_necess
ary': local variable is initialized but not referenced (compiling source file C:\Users\ntitov\Downloads\LightGBM\src\tr
eelearner\tree_learner.cpp) [C:\Users\ntitov\Downloads\LightGBM\build\lightgbm.vcxproj]

This is also related to template, so cannot be fixed..

@StrikerRUS
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This is also related to template, so cannot be fixed..

OK, got it, thanks!

StrikerRUS
StrikerRUS approved these changes Sep 29, 2020
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@guolinke Thank you very much! I can confirm that only warnings about unreachable code and related to templates are left.

@guolinke guolinke merged commit 3c0e12d into master Sep 29, 2020
@StrikerRUS StrikerRUS deleted the fix-warn2 branch September 30, 2020 02:10
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@StrikerRUS StrikerRUS StrikerRUS approved these changes

@btrotta btrotta Awaiting requested review from btrotta

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Compiler warnings with VS 2015
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@guolinke @StrikerRUS