c++ stream format flags and manipulators – key words

bitVector — probably there’s a hidden bitArray of boolean flags for each stream instance. http://www.cplusplus.com/reference/iostream/ios_base/flags/

1-to-1 — one flag for one manipulator function

Concrete eg — http://www.cplusplus.com/reference/iostream/manipulators/showpos/

transformer — a typical manipulator is a function accepting a stream by reference, and returning the same stream object by reference

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