Remove boost as alternative in ofConstants.h

[NickHardeman]

boost is also referenced in a few make files; like openFrameworksCompiled / project / osx / config.osx.default.mk; since it's an exclusion, it's been left there.
Referenced for v0.12.1 here: #7588

[dimitre]

Nice, maybe we can remove experimental also
I've been using like this:

#include <filesystem>
namespace of {
	namespace filesystem = std::filesystem;
}
#define OF_USING_STD_FS

[NickHardeman]

Since experimental is already in there, maybe we can leave it for now to support older compilers?

[ofTheo]

@NickHardeman might be good to add to the PR removing the VS boost references too?

[NickHardeman]

@ofTheo ah yes, just updated VS Code, then did a test building a vs code project on macOS and it compiled successfully. There are some lingering references to boost via make files, ie.

openFrameworks/libs/openFrameworksCompiled/project/osx/config.osx.default.mk

Line 270 in a94e7e9

PLATFORM_CORE_EXCLUSIONS += $(OF_LIBS_PATH)/boost/%

But seems a little safer to leave the exclusions in those types of files until after the v0.12.1 release.

[ofTheo]

Sorry meant these ones:

openFrameworks/libs/openFrameworksCompiled/project/vs/openFrameworksDebug.props

Line 13 in a94e7e9

<AdditionalIncludeDirectories>$(OF_ROOT)\libs\openFrameworks;$(OF_ROOT)\libs\openFrameworks\graphics;$(OF_ROOT)\libs\openFrameworks\app;$(OF_ROOT)\libs\openFrameworks\sound;$(OF_ROOT)\libs\openFrameworks\utils;$(OF_ROOT)\libs\openFrameworks\communication;$(OF_ROOT)\libs\openFrameworks\video;$(OF_ROOT)\libs\openFrameworks\types;$(OF_ROOT)\libs\openFrameworks\math;$(OF_ROOT)\libs\openFrameworks\3d;$(OF_ROOT)\libs\openFrameworks\gl;$(OF_ROOT)\libs\openFrameworks\events;$(OF_ROOT)\libs\glm\include;$(OF_ROOT)\libs\rtAudio\include;$(OF_ROOT)\libs\quicktime\include;$(OF_ROOT)\libs\freetype\include;$(OF_ROOT)\libs\freetype\include\freetype2;$(OF_ROOT)\libs\FreeImage\include;$(OF_ROOT)\libs\videoInput\include;$(OF_ROOT)\libs\glew\include\;$(OF_ROOT)\libs\glu\include;$(OF_ROOT)\libs\tess2\include;$(OF_ROOT)\libs\cairo\include;$(OF_ROOT)\libs\pixman\include\pixman;$(OF_ROOT)\libs\libpng\include;$(OF_ROOT)\libs\zlib\include;$(OF_ROOT)\libs\glfw\include;$(OF_ROOT)\libs\openssl\include;$(OF_ROOT)\libs\utf8\include;$(OF_ROOT)\libs\boost\include;$(OF_ROOT)\libs\json\include;$(OF_ROOT)\libs\curl\include;$(OF_ROOT)\libs\uriparser\include;$(OF_ROOT)\libs\pugixml\include;$(OF_ROOT)\addons;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>

openFrameworks/libs/openFrameworksCompiled/project/vs/openframeworksLib.vcxproj

Line 78 in a94e7e9

<AdditionalIncludeDirectories>$(OF_ROOT)\libs\openFrameworks;$(OF_ROOT)\libs\openFrameworks\graphics;$(OF_ROOT)\libs\openFrameworks\app;$(OF_ROOT)\libs\openFrameworks\sound;$(OF_ROOT)\libs\openFrameworks\utils;$(OF_ROOT)\libs\openFrameworks\communication;$(OF_ROOT)\libs\openFrameworks\video;$(OF_ROOT)\libs\openFrameworks\types;$(OF_ROOT)\libs\openFrameworks\math;$(OF_ROOT)\libs\openFrameworks\3d;$(OF_ROOT)\libs\openFrameworks\gl;$(OF_ROOT)\libs\openFrameworks\events;$(OF_ROOT)\libs\glut\include;$(OF_ROOT)\libs\glm\include;$(OF_ROOT)\libs\rtAudio\include;$(OF_ROOT)\libs\quicktime\include;$(OF_ROOT)\libs\freetype\include;$(OF_ROOT)\libs\freetype\include\freetype2;$(OF_ROOT)\libs\FreeImage\include;$(OF_ROOT)\libs\videoInput\include;$(OF_ROOT)\libs\glew\include\;$(OF_ROOT)\libs\glu\include;$(OF_ROOT)\libs\tess2\include;$(OF_ROOT)\libs\cairo\include;$(OF_ROOT)\libs\poco\include;$(OF_ROOT)\libs\glfw\include;$(OF_ROOT)\libs\openssl\include;$(OF_ROOT)\libs\utf8\include;$(OF_ROOT)\libs\boost\include;$(OF_ROOT)\libs\json\include;$(OF_ROOT)\libs\curl\include;$(OF_ROOT)\libs\uriparser\include;$(OF_ROOT)\libs\pugixml\include;$(OF_ROOT)\addons;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>

openFrameworks/libs/openFrameworksCompiled/project/vs/openFrameworksRelease.props

Line 13 in a94e7e9

<AdditionalIncludeDirectories>$(OF_ROOT)\libs\openFrameworks;$(OF_ROOT)\libs\openFrameworks\graphics;$(OF_ROOT)\libs\openFrameworks\app;$(OF_ROOT)\libs\openFrameworks\sound;$(OF_ROOT)\libs\openFrameworks\utils;$(OF_ROOT)\libs\openFrameworks\communication;$(OF_ROOT)\libs\openFrameworks\video;$(OF_ROOT)\libs\openFrameworks\types;$(OF_ROOT)\libs\openFrameworks\math;$(OF_ROOT)\libs\openFrameworks\3d;$(OF_ROOT)\libs\openFrameworks\gl;$(OF_ROOT)\libs\openFrameworks\events;$(OF_ROOT)\libs\glm\include;$(OF_ROOT)\libs\rtAudio\include;$(OF_ROOT)\libs\quicktime\include;$(OF_ROOT)\libs\freetype\include;$(OF_ROOT)\libs\freetype\include\freetype2;$(OF_ROOT)\libs\FreeImage\include;$(OF_ROOT)\libs\videoInput\include;$(OF_ROOT)\libs\glew\include\;$(OF_ROOT)\libs\glu\include;$(OF_ROOT)\libs\tess2\include;$(OF_ROOT)\libs\cairo\include;$(OF_ROOT)\libs\pixman\include\pixman;$(OF_ROOT)\libs\libpng\include;$(OF_ROOT)\libs\zlib\include;$(OF_ROOT)\libs\glfw\include;$(OF_ROOT)\libs\openssl\include;$(OF_ROOT)\libs\utf8\include;$(OF_ROOT)\libs\boost\include;$(OF_ROOT)\libs\json\include;$(OF_ROOT)\libs\curl\include;$(OF_ROOT)\libs\uriparser\include;$(OF_ROOT)\libs\pugixml\include;$(OF_ROOT)\addons;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>

openFrameworks/libs/openFrameworksCompiled/project/vs/openFrameworksRelease.props

Line 13 in a94e7e9

<AdditionalIncludeDirectories>$(OF_ROOT)\libs\openFrameworks;$(OF_ROOT)\libs\openFrameworks\graphics;$(OF_ROOT)\libs\openFrameworks\app;$(OF_ROOT)\libs\openFrameworks\sound;$(OF_ROOT)\libs\openFrameworks\utils;$(OF_ROOT)\libs\openFrameworks\communication;$(OF_ROOT)\libs\openFrameworks\video;$(OF_ROOT)\libs\openFrameworks\types;$(OF_ROOT)\libs\openFrameworks\math;$(OF_ROOT)\libs\openFrameworks\3d;$(OF_ROOT)\libs\openFrameworks\gl;$(OF_ROOT)\libs\openFrameworks\events;$(OF_ROOT)\libs\glm\include;$(OF_ROOT)\libs\rtAudio\include;$(OF_ROOT)\libs\quicktime\include;$(OF_ROOT)\libs\freetype\include;$(OF_ROOT)\libs\freetype\include\freetype2;$(OF_ROOT)\libs\FreeImage\include;$(OF_ROOT)\libs\videoInput\include;$(OF_ROOT)\libs\glew\include\;$(OF_ROOT)\libs\glu\include;$(OF_ROOT)\libs\tess2\include;$(OF_ROOT)\libs\cairo\include;$(OF_ROOT)\libs\pixman\include\pixman;$(OF_ROOT)\libs\libpng\include;$(OF_ROOT)\libs\zlib\include;$(OF_ROOT)\libs\glfw\include;$(OF_ROOT)\libs\openssl\include;$(OF_ROOT)\libs\utf8\include;$(OF_ROOT)\libs\boost\include;$(OF_ROOT)\libs\json\include;$(OF_ROOT)\libs\curl\include;$(OF_ROOT)\libs\uriparser\include;$(OF_ROOT)\libs\pugixml\include;$(OF_ROOT)\addons;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>

openFrameworks/libs/openFrameworksCompiled/project/vs2019/openframeworksLib.vcxproj

Line 78 in a94e7e9

<AdditionalIncludeDirectories>$(OF_ROOT)\libs\openFrameworks;$(OF_ROOT)\libs\openFrameworks\graphics;$(OF_ROOT)\libs\openFrameworks\app;$(OF_ROOT)\libs\openFrameworks\sound;$(OF_ROOT)\libs\openFrameworks\utils;$(OF_ROOT)\libs\openFrameworks\communication;$(OF_ROOT)\libs\openFrameworks\video;$(OF_ROOT)\libs\openFrameworks\types;$(OF_ROOT)\libs\openFrameworks\math;$(OF_ROOT)\libs\openFrameworks\3d;$(OF_ROOT)\libs\openFrameworks\gl;$(OF_ROOT)\libs\openFrameworks\events;$(OF_ROOT)\libs\glut\include;$(OF_ROOT)\libs\glm\include;$(OF_ROOT)\libs\rtAudio\include;$(OF_ROOT)\libs\quicktime\include;$(OF_ROOT)\libs\freetype\include;$(OF_ROOT)\libs\freetype\include\freetype2;$(OF_ROOT)\libs\FreeImage\include;$(OF_ROOT)\libs\videoInput\include;$(OF_ROOT)\libs\glew\include\;$(OF_ROOT)\libs\glu\include;$(OF_ROOT)\libs\tess2\include;$(OF_ROOT)\libs\cairo\include;$(OF_ROOT)\libs\poco\include;$(OF_ROOT)\libs\glfw\include;$(OF_ROOT)\libs\openssl\include;$(OF_ROOT)\libs\utf8\include;$(OF_ROOT)\libs\boost\include;$(OF_ROOT)\libs\json\include;$(OF_ROOT)\libs\curl\include;$(OF_ROOT)\libs\uriparser\include;$(OF_ROOT)\libs\pugixml\include;$(OF_ROOT)\addons;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>

Def worth doing a search:
https://github.com/search?q=repo%3Aopenframeworks%2FopenFrameworks+boost&type=code

I'd do these as a separate PR but it would be nice to have it all in one squashed commit.