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* New build option: USE_PRECISE_TEXT_PARSER.

Use fast_double_parser for text file parsing. For each number, fallback
to strtod in case of parse failure.

* Add benchmark for CSVParser with Atof and AtofPrecise.

* Fix lint complaint.

* Fix typo in open result error message.

* Revert "Fix lint complaint."

This reverts commit 92ab0b6bce9f17d7be9eaeb20f19d4a0a36f0387.

* Revert "Add benchmark for CSVParser with Atof and AtofPrecise."

This reverts commit 4f8639abd06c679d4382eb715a1793afd94df3d2.

* Use AtofPrecise in Common::__StringToTHelper.

* [option] precise_float_parser: precise float number parsing for text input.

* Remove USE_PRECISE_TEXT_PARSER compile option.

* test: add test for Common::AtofPrecise.

* test: remove ChunkedArrayTest with 0 length.

This triggers Log::Fatal which aborts the test program.

* fix lint, add copyright.

* Revert "test: remove ChunkedArrayTest with 0 length."

This reverts commit 346c76affe9e78b6ca2738c4a56dbb9c00f31102.

* Use LightGBM::Common::Sign

* save precise_float_parser in model file.

* Fix error checking in AtofPrecise. Add more test cases.

* Remove test case that can't pass under macOS.

* Apply suggestions from code review
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* [R-package] update docs on C++ interface

* Update R-package/src/lightgbm_R.h
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* Update R-package/src/lightgbm_R.h
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* add missing start_iteration doc
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* fix param name

* Update gpu_tree_learner.h

* Update gbdt.h

* converted LGBM_BoosterSaveModel_R

* switch all other non-params cases

* handle params

* Correct spelling

Most changes were in comments, and there were a few changes to literals for log output.

There were no changes to variable names, function names, IDs, or functionality.

* Clarify a phrase in a comment
Co-authored-by: James Lamb <jaylamb20@gmail.com>

* Clarify a phrase in a comment
Co-authored-by: James Lamb <jaylamb20@gmail.com>

* Clarify a phrase in a comment
Co-authored-by: James Lamb <jaylamb20@gmail.com>

* Correct spelling

Most are code comments, but one case is a literal in a logging message.

There are a few grammar fixes too.
Co-authored-by: James Lamb <jaylamb20@gmail.com>

* real pointer for matrix

* remove R_REAL_PTR

* remove R_INT_PTR

* add test

* [R-package] replace R_AS_INT with R built-in

* update header

* more changes

* Apply suggestions from code review
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* [R-package] move some functions over to SEXP objects

* clarify comment

* remove paste0()

* fix registration table

* fix cmake builds

* [R-package] prevent symbol lookup conflicts

* add unit tests

* only run test on Windows

* move to .Call() calls

* fix references

* testing registration for CMake builds

* revert NAMESPACE changes

* revert testing changes

* Install graphviz from default conda channel

* Update test.sh

* Update setup.sh

* Update test.sh

* Update setup.sh

* Update setup.sh

* Update setup.sh

* Update setup.sh

* Update setup.sh

* Update setup.sh

* chanche MRO

* fix MRO resolution

This reverts commit 536946e3.

* [R-package] raise errors from C++ side

* working but a lot of warnings

* more changes

* simplify

* cleanup

* linting

* fix valgrind issues

* revert unnecessary change

* fix typo in dask _train as mentioned in 4101

* Update python-package/lightgbm/dask.py
Co-authored-by: James Lamb <jaylamb20@gmail.com>

* [ci] parallelize R package installs in CI jobs

* build 2

* build 3

* add ncpus in static_analysis

* [R-package] clarify parameter documentation

* fixes to braces

* linting

* Migrate to f-strings in python-package/lightgbm/sklearn.py

* Apply suggestions from code review
Co-authored-by: James Lamb <jaylamb20@gmail.com>

* Update python-package/lightgbm/sklearn.py
Co-authored-by: James Lamb <jaylamb20@gmail.com>

* Apply suggestions from code review
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* Add suggestions from code review

* resolve conflicts

* Apply suggestions from code review
Co-authored-by: James Lamb <jaylamb20@gmail.com>

* Update sklearn.py
Co-authored-by: James Lamb <jaylamb20@gmail.com>
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* use same default arguments as python

* Update R-package/R/lgb.cv.R

Changed.
Co-authored-by: James Lamb <jaylamb20@gmail.com>

* revert change in docs
Co-authored-by: James Lamb <jaylamb20@gmail.com>

* update the explanation of num_threads in lightgbm.R

* adjusted sentences for linting.

* remove white space for lintr pass

* add note about num_thread param in files

* Return feature importances as visible

Feature importances are returned as invisible. I don't get why would anyone want them invisible. This PR fixes it.

* Update R-package/R/lgb.importance.R

Thanks, didn't realize that, changed now.
Co-authored-by: James Lamb <jaylamb20@gmail.com>
Co-authored-by: James Lamb <jaylamb20@gmail.com>

* Add changes to gcc-tips

* Update docs/gcc-Tips.rst
Co-authored-by: James Lamb <jaylamb20@gmail.com>

* Update docs/gcc-Tips.rst
Co-authored-by: James Lamb <jaylamb20@gmail.com>

* Remove image files for gcc-tips
Co-authored-by: James Lamb <jaylamb20@gmail.com>

* run cpp tests at CI

* Update docs/Installation-Guide.rst
Co-authored-by: James Lamb <jaylamb20@gmail.com>
Co-authored-by: James Lamb <jaylamb20@gmail.com>