Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
This is an older version of Boost and was released in 2018. The current version is 1.89.0.
Nearly all macros in VMD have equivalent reentrant versions which are meant to be used in a BOOST_PP_WHILE loop. These are versions which have an underscore D suffix, take the next available BOOST_PP_WHILE iteration as their first parameter, and then have the exact same functionality as their unsuffixed equivalents. They can be used in BOOST_PP_WHILE loops to provide slightly quicker preprocessing but, as the documentation for BOOST_PP_WHILE and BOOST_PP_WHILE_##d explain, they do not have to be used.
These macros are:
Arrays
Identifiers
Lists
Sequences
Seqs
Types
Other