64 warnings when building with MSVC (Visual Studio 2022 version 17.14.13)

[ScottHutchinson]

Warning level W4, Platform x64 (Windows). I used cmake -G "Visual Studio 17 2022" .. to generate the OpenXLSX.vcxproj file referenced in my Visual Studio SpreadsheetMaker project. I'm just getting started, but if this library proves to be fast enough at converting a delimited text file to a .xlsx file, then I could submit a PR to fix these warnings, if you like.

Rebuild started at 11:44 AM... 1>------ Rebuild All started: Project: OpenXLSX, Configuration: Release x64 ------ 1>Building Custom Rule C:/Users/scott/source/SpreadsheetMaker/OpenXLSX/OpenXLSX/CMakeLists.txt 1>XLCell.cpp 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLCellValue.hpp(87,53): warning C4244: 'return': conversion from 'int64_t' to 'double', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLCell.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLSharedStrings.hpp(136,65): warning C4267: 'return': conversion from 'size_t' to 'int32_t', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLCell.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLCell.cpp(167,19): warning C4456: declaration of 'attr' hides previous local declaration 1> C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLCell.cpp(160,22): 1> see declaration of 'attr' 1>XLCellIterator.cpp 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLCellValue.hpp(87,53): warning C4244: 'return': conversion from 'int64_t' to 'double', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLCellIterator.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLSharedStrings.hpp(136,65): warning C4267: 'return': conversion from 'size_t' to 'int32_t', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLCellIterator.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLCellIterator.cpp(286,57): warning C4244: '=': conversion from 'unsigned __int64' to 'uint32_t', possible loss of data 1>XLCellRange.cpp 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLCellValue.hpp(87,53): warning C4244: 'return': conversion from 'int64_t' to 'double', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLCellRange.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLSharedStrings.hpp(136,65): warning C4267: 'return': conversion from 'size_t' to 'int32_t', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLCellRange.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLCellRange.cpp(161,25): warning C4244: 'initializing': conversion from 'int' to 'uint16_t', possible loss of data 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLCellRange.cpp(162,25): warning C4244: 'initializing': conversion from 'int' to 'uint16_t', possible loss of data 1>XLCellReference.cpp 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLCellReference.cpp(344,16): warning C4244: 'return': conversion from 'uint32_t' to 'uint16_t', possible loss of data 1>C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.44.35207\include\utility(303,16): warning C4244: 'initializing': conversion from '_Ty' to '_Ty1', possible loss of data 1>C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.44.35207\include\utility(303,16): warning C4244: with 1>C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.44.35207\include\utility(303,16): warning C4244: [ 1>C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.44.35207\include\utility(303,16): warning C4244: _Ty=unsigned __int64 1>C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.44.35207\include\utility(303,16): warning C4244: ] 1>C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.44.35207\include\utility(303,16): warning C4244: and 1>C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.44.35207\include\utility(303,16): warning C4244: [ 1>C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.44.35207\include\utility(303,16): warning C4244: _Ty1=uint32_t 1>C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.44.35207\include\utility(303,16): warning C4244: ] 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLCellReference.cpp') 1> C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.44.35207\include\utility(303,16): 1> the template instantiation context (the oldest one first) is 1> C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLCellReference.cpp(385,13): 1> see reference to function template instantiation 'std::pair<uint32_t,uint16_t>::pair<unsigned __int64,unsigned int,0>(std::pair<unsigned __int64,unsigned int> &&) noexcept' being compiled 1> C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLCellReference.cpp(385,13): 1> see the first reference to 'std::pair<uint32_t,uint16_t>::pair' in 'OpenXLSX::XLCellReference::coordinatesFromAddress' 1>XLCellValue.cpp 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLCellValue.hpp(87,53): warning C4244: 'return': conversion from 'int64_t' to 'double', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLCellValue.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLSharedStrings.hpp(136,65): warning C4267: 'return': conversion from 'size_t' to 'int32_t', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLCellValue.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLCellValue.cpp(497,52): warning C4245: 'argument': conversion from 'int' to 'unsigned __int64', signed/unsigned mismatch 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLCellValue.cpp(497,51): warning C4244: 'return': conversion from 'unsigned __int64' to 'int32_t', possible loss of data 1>XLColor.cpp 1>XLColumn.cpp 1>XLComments.cpp 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLSharedStrings.hpp(136,65): warning C4267: 'return': conversion from 'size_t' to 'int32_t', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLComments.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLCellValue.hpp(87,53): warning C4244: 'return': conversion from 'int64_t' to 'double', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLComments.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLComments.cpp(471,38): warning C4101: 'e': unreferenced local variable 1>XLContentTypes.cpp 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLSharedStrings.hpp(136,65): warning C4267: 'return': conversion from 'size_t' to 'int32_t', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLContentTypes.cpp') 1>XLDateTime.cpp 1>XLDocument.cpp 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLSharedStrings.hpp(136,65): warning C4267: 'return': conversion from 'size_t' to 'int32_t', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLDocument.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLCellValue.hpp(87,53): warning C4244: 'return': conversion from 'int64_t' to 'double', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLDocument.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLDocument.cpp(520,20): warning C4456: declaration of 'pos' hides previous local declaration 1> C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLDocument.cpp(498,12): 1> see declaration of 'pos' 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLDocument.cpp(1462,28): warning C4267: 'initializing': conversion from 'size_t' to 'int32_t', possible loss of data 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLDocument.cpp(1468,48): warning C4244: 'argument': conversion from 'unsigned int' to 'uint16_t', possible loss of data 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLDocument.cpp(1570,39): warning C4244: 'return': conversion from 'unsigned int' to 'char', possible loss of data 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLDocument.cpp(1571,30): warning C4244: 'return': conversion from 'unsigned int' to 'char', possible loss of data 1>XLDrawing.cpp 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLSharedStrings.hpp(136,65): warning C4267: 'return': conversion from 'size_t' to 'int32_t', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLDrawing.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLCellValue.hpp(87,53): warning C4244: 'return': conversion from 'int64_t' to 'double', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLDrawing.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLDrawing.cpp(203,105): warning C4244: 'return': conversion from 'unsigned int' to 'uint16_t', possible loss of data 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLDrawing.cpp(281,30): warning C4244: 'return': conversion from '__int64' to 'int16_t', possible loss of data 1>XLFormula.cpp 1>XLMergeCells.cpp 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLCellValue.hpp(87,53): warning C4244: 'return': conversion from 'int64_t' to 'double', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLMergeCells.cpp') 1>XLProperties.cpp 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLSharedStrings.hpp(136,65): warning C4267: 'return': conversion from 'size_t' to 'int32_t', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLProperties.cpp') 1>XLRelationships.cpp 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLSharedStrings.hpp(136,65): warning C4267: 'return': conversion from 'size_t' to 'int32_t', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLRelationships.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLRelationships.cpp(102,21): warning C4244: 'argument': conversion from 'uint64_t' to 'unsigned int', possible loss of data 1>XLRow.cpp 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLCellValue.hpp(87,53): warning C4244: 'return': conversion from 'int64_t' to 'double', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLRow.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLSharedStrings.hpp(136,65): warning C4267: 'return': conversion from 'size_t' to 'int32_t', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLRow.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLRow.cpp(489,61): warning C4244: '=': conversion from 'unsigned __int64' to 'uint32_t', possible loss of data 1>XLRowData.cpp 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLCellValue.hpp(87,53): warning C4244: 'return': conversion from 'int64_t' to 'double', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLRowData.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLSharedStrings.hpp(136,65): warning C4267: 'return': conversion from 'size_t' to 'int32_t', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLRowData.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLRowData.cpp(386,24): warning C4267: 'initializing': conversion from 'size_t' to 'uint16_t', possible loss of data 1>XLSharedStrings.cpp 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLSharedStrings.hpp(136,65): warning C4267: 'return': conversion from 'size_t' to 'int32_t', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLSharedStrings.cpp') 1>XLSheet.cpp 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLCellValue.hpp(87,53): warning C4244: 'return': conversion from 'int64_t' to 'double', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLSheet.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLSharedStrings.hpp(136,65): warning C4267: 'return': conversion from 'size_t' to 'int32_t', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLSheet.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLSheet.cpp(466,124): warning C4244: 'return': conversion from 'unsigned int' to 'uint16_t', possible loss of data 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLSheet.cpp(475,120): warning C4244: 'return': conversion from 'unsigned int' to 'uint16_t', possible loss of data 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLSheet.cpp(476,121): warning C4244: 'return': conversion from 'int' to 'int16_t', possible loss of data 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLSheet.cpp(963,32): warning C4244: '=': conversion from 'int' to 'uint16_t', possible loss of data 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLSheet.cpp(964,32): warning C4244: '=': conversion from 'int' to 'uint16_t', possible loss of data 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLSheet.cpp(1230,55): warning C4244: '=': conversion from 'int' to 'uint16_t', possible loss of data 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLSheet.cpp(1231,55): warning C4244: '=': conversion from 'int' to 'uint16_t', possible loss of data 1>Compiling... 1>XLStyles.cpp 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLSharedStrings.hpp(136,65): warning C4267: 'return': conversion from 'size_t' to 'int32_t', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLStyles.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLCellValue.hpp(87,53): warning C4244: 'return': conversion from 'int64_t' to 'double', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLStyles.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLStyles.cpp(1748,103): warning C4244: 'return': conversion from 'unsigned int' to 'uint16_t', possible loss of data 1>XLTables.cpp 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLCellValue.hpp(87,53): warning C4244: 'return': conversion from 'int64_t' to 'double', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLTables.cpp') 1>XLWorkbook.cpp 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLSharedStrings.hpp(136,65): warning C4267: 'return': conversion from 'size_t' to 'int32_t', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLWorkbook.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLCellValue.hpp(87,53): warning C4244: 'return': conversion from 'int64_t' to 'double', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLWorkbook.cpp') 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLWorkbook.cpp(269,28): warning C4244: 'return': conversion from 'uint32_t' to 'uint16_t', possible loss of data 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLWorkbook.cpp(372,17): warning C4456: declaration of 'item' hides previous local declaration 1> C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLWorkbook.cpp(333,13): 1> see declaration of 'item' 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLWorkbook.cpp(722,83): warning C4244: 'argument': conversion from 'int' to 'uint16_t', possible loss of data 1>XLXmlData.cpp 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLSharedStrings.hpp(136,65): warning C4267: 'return': conversion from 'size_t' to 'int32_t', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLXmlData.cpp') 1>XLXmlFile.cpp 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLSharedStrings.hpp(136,65): warning C4267: 'return': conversion from 'size_t' to 'int32_t', possible loss of data 1>(compiling source file '../../../../../SpreadsheetMaker/OpenXLSX/OpenXLSX/sources/XLXmlFile.cpp') 1>XLXmlParser.cpp 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLXmlParser.cpp(114,9): warning C4996: 'strcpy': This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. 1>C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\sources\XLXmlParser.cpp(131,9): warning C4996: 'strcpy': This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. 1>XLZipArchive.cpp 1>OpenXLSX.vcxproj -> C:\Users\scott\source\SpreadsheetMaker\OpenXLSX\OpenXLSX\build\Release\OpenXLSX.lib 1>Done building project "OpenXLSX.vcxproj". 2>------ Rebuild All started: Project: SpreadsheetMaker, Configuration: Release x64 ------ 2>SpreadsheetMaker.cpp 2>C:\Users\scott\source\repos\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLCellValue.hpp(87,53): warning C4244: 'return': conversion from 'int64_t' to 'double', possible loss of data 2>(compiling source file 'SpreadsheetMaker.cpp') 2>C:\Users\scott\source\repos\SpreadsheetMaker\OpenXLSX\OpenXLSX\headers\XLSharedStrings.hpp(136,65): warning C4267: 'return': conversion from 'size_t' to 'int32_t', possible loss of data 2>(compiling source file 'SpreadsheetMaker.cpp') 2>C:\Users\scott\source\repos\SpreadsheetMaker\SpreadsheetMaker\SpreadsheetMaker.cpp(33,30): warning C4244: 'argument': conversion from 'const __int64' to 'uint32_t', possible loss of data 2>Generating code 2>Previous IPDB not found, fall back to full compilation. 2>All 3290 functions were compiled because no usable IPDB/IOBJ from previous compilation was found. 2>Finished generating code 2>SpreadsheetMaker.vcxproj -> C:\Users\scott\source\repos\SpreadsheetMaker\x64\Release\SpreadsheetMaker.exe 2>Done building project "SpreadsheetMaker.vcxproj". ========== Rebuild All: 2 succeeded, 0 failed, 0 skipped ========== ========== Rebuild completed at 11:45 AM and took 42.969 seconds ==========

[aral-matrix]

It seems I haven't yet tried to build the library with pedantic warning levels - we're currently trying to pull some CMake settings straight in the development-aral and development-aral-ktb branches, until that is done, I recommend not investing any time in suggesting fixes, although I appreciate the offer.
To be honest, I personally am not a big fan of pull requests (unless very localized in code), as I have to review them line by line anyways (I'm paranoid ;) and it's more work than implementing the fixes myself.
Should I find time eventually, I would try a pedantic warnings build myself and go through warnings to fix them one by one.

As for converting CSV files to XLSX files - for large files and not-so-complex restructuring, performance-wise you might be better off to do the restructuring directly in CSV via a programming language of your choice, and then import the CSV file into Excel (if it needs to be programmatically, e.g. by VBA).