# Boost C++ Libraries

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This is the documentation for a snapshot of the develop branch, built from commit e028efd1e7.

### boost/vmd/is_general_identifier.hpp


//  (C) Copyright Edward Diener 2020
//  Use, modification and distribution are subject to the Boost Software License,
//  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at

#if !defined(BOOST_VMD_IS_GENERAL_IDENTIFIER_HPP)
#define BOOST_VMD_IS_GENERAL_IDENTIFIER_HPP

#include <boost/vmd/detail/setup.hpp>

#include <boost/vmd/detail/is_general_identifier.hpp>

/*

The succeeding comments in this file are in doxygen format.

*/

/** \file
*/

/** \def BOOST_VMD_IS_GENERAL_IDENTIFIER(...)

\brief Tests whether a parameter is a general identifier.

The first variadic parameter is required and it is the input to test.

Passing more than one variadic argument is an error.

@code

returns   = 1 if the parameter is any general identifier and only a single variadic argument is given, otherwise 0.

@endcode

The argument to the macro should be a single possible identifier
and not a VMD sequence of preprocessor tokens.

If the input is not a VMD data type this macro could lead to
a preprocessor error. This is because the macro
uses preprocessor concatenation to determine if the input
is an identifier once it is determined that the input is not empty
and does not start with parenthesis. If the data being concatenated would
lead to an invalid preprocessor token the compiler can issue
a preprocessor error.

*/

#define BOOST_VMD_IS_GENERAL_IDENTIFIER(...) \
BOOST_VMD_DETAIL_IS_GENERAL_IDENTIFIER(__VA_ARGS__) \
/**/