wtlstlnamespace contains all components in the WTLSTL project.
By default, the
wtlstl namespace is actually an alias for the namespace
stlsoft::wtlstl_project, which is where all the WTLSTL components actually reside. This measure allows all components within the main the STLSoft project (which are defined within the
stlsoft namespace) to be visible to all components "within" the
wtlstl namespace. (Otherwise, there would be a whole lot of onerous qualification throughout the code of all sub-projects.)
_WTLSTL_NO_NAMESPACEare defined, all WTLSTL components will be defined in the global namespace. Conversely, if the
_STLSOFT_NO_NAMESPACEsymbol (not to be confused with the
_STLSOFT_NO_NAMESPACESsymbol!) is defined - meaning that all main project components are to be defined in the global namespace, and
_WTLSTL_NO_NAMESPACEis not defined, then all WTLSTL components will be defined within a bona fide
This is a vestige of compatibility with compilers with no (or no sensible) namespace support that is maintained for reasons of backwards compatiblity and because it is, in rare circumstances, a useful facility.