Use BOOST_OVERRIDE to fix GCC -Wsuggest-override and Clang-tidy moder…

…nize-use-override warnings.

Also fix Clang-tidy readability-container-size-empty and readability-redundant-string-init warnings.

Use BOOST_OVERRIDE to fix GCC -Wsuggest-override and Clang-tidy moder…

…nize-use-override warnings.

Also fix Clang-tidy readability-container-size-empty and readability-redundant-string-init warnings.

Use BOOST_OVERRIDE to fix GCC -Wsuggest-override and Clang-tidy moder…

…nize-use-override warnings.

Also fix Clang-tidy readability-container-size-empty and readability-redundant-string-init warnings.

Do not define BOOST_CONTRACT_SOURCE in CMakeLists.txt

Do not define BOOST_CONTRACT_SOURCE in CMakeLists.txt

Do not define BOOST_CONTRACT_SOURCE in CMakeLists.txt

Do not define BOOST_CONTRACT_SOURCE in CMakeLists.txt

Do not define BOOST_CONTRACT_SOURCE in CMakeLists.txt

Do not define BOOST_CONTRACT_SOURCE in CMakeLists.txt

Do not define BOOST_CONTRACT_SOURCE in CMakeLists.txt