This is automatic replacement with
ag '(?<!std::)size_t(?!\w)' --ignore-dir=ThirdParty -l | xargs perl -pi.bak -e  's/(?<!std::)size_t(?!\w)/std::size_t/g'

This is a work in progress commit (tested on Mac OS) which shows how to build some boost libraries. Not all targets are changed accordingly but `make test` should work.

changed dropFileExtension() implementation

Place it in StringTools.

Use extractBaseName() now.

Replace getFileNameFromPath(f, true/false) with corresponding extractBaseName() and extractBaseNameWithoutExtension().

Calling getFileNameFromPath() for now.

moved functions getFileNameFromPath(), getSuffixFromPath(), copyPathToFileName() and extractPath() from files StringTools.{cpp,h} to files FileTools.{cpp,h}

- remove functions to manipulate file names because they exist in StringTools.h
- move implementations into cpp
- fix type, etc.