I have not touch examples because they are not affecting Spirit usage and testing dependencies, and modernizing them also seems like a waste of time when we encourage to start new projects with X3 instead of Qi.
Commit (almost) automatically generated with the following sed command:
sed -i -ne '1h;1!H;${g;s|\n[[:blank:]]*private:\n\([[:blank:]]*\)// silence MSVC warning C4512: assignment operator could not be generated\n\([[:blank:]]*\)\([^\n]\+\);\n|\n\1// silence MSVC warning C4512: assignment operator could not be generated\n\2BOOST_DELETED_FUNCTION(\3);\n|g;p}' $(git ls-files)
Then all files in the x3 subfolder were reverted to HEAD, and manually
updated to use " = delete" instead of BOOST_DELETED_FUNCTION.
Not intrusive. Significantly speeds up tests on MSVC (for about 3 times).
Finally solves exceeding build time limits on CI with MSVC compilers.
Did not set up PCH for X3, it is fast as-is (tooks only about 2 minutes).
Repository tests reuse PCH from Qi/Karma tests.
