[/ 
  (C) Copyright Edward Diener 2011-2015
  Distributed under the Boost Software License, Version 1.0.
  (See accompanying file LICENSE_1_0.txt or copy at
  http://www.boost.org/LICENSE_1_0.txt).
]

[section:vmd_naming Naming conventions]

All of the macros in the library begin with the prefix BOOST_VMD_, 
where VMD stands for 'Variadic Macro Data'.

Following the prefix, certain names in the macros refer to data types 
in this library or Boost PP. These names and their data types are:

# TUPLE      = Boost PP tuple data type.
# ARRAY      = Boost PP array data type.
# LIST       = Boost PP list data type.
# SEQ        = Boost PP seq data type.
# IDENTIFIER = A VMD identifier
# NUMBER     = A VMD number, which is a Boost PP number with some enhancements
# TYPE       = A VMD type

I have used most of these names in order to mimic the naming of Boost PP 
as closely as possible. Subsequent use of the words 'array', 'list',
'seq', and 'tuple' refer to these Boost PP data types unless otherwise
noted. See the help for Boost PP for any explanation of these
data types.

The term 'sequence' refers to a sequence of VMD data types and is not the
same as a Boost PP sequence which is always referred to in this documentation
as a 'seq'.

The term 'return' refers to the expansion of a macro. I use the terminology
of a macro "returning some data" rather than the terminology of a macro
"expanding to some data", even if the latter is more accurate, because it
more closely corresponds to the way I believe C++ programmers think about
macro programming.

The term 'emptiness' refers to no preprocessor data being passed to or returned
from a macro. I have avoided the word 'nothing' because it has too vague a meaning.

The term 'data type' refers to the various preprocessor input types
which VMD can parse and which are listed above, also including emptiness.

The term 'v-type' refers to a VMD type, the term 'number' returns to a VMD number
and the term 'identifier' refers to a VMD identifier. All these will be explained
in their proper place.

The term "UB" stands for "undefined behavior" as it is specified in the C++ standard.

[endsect]