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Disable processing of function.hpp if it is included more than once in the TU and BOOST_FUNCTION_MAX_ARGS does not change.

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Edward Diener
2017-07-06 15:37:18 -04:00
parent 44a68454aa
commit d6cff3991d
4 changed files with 118 additions and 4 deletions
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16
include/boost/function.hpp
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@ -10,15 +10,21 @@
// William Kempf, Jesse Jones and Karl Nelson were all very helpful in the
// design of this library.
#ifndef BOOST_FUNCTION_MAX_ARGS
# define BOOST_FUNCTION_MAX_ARGS 10
#endif // BOOST_FUNCTION_MAX_ARGS
#if !defined(BOOST_FUNCTION_MAX_ARGS_DEFINED) || (BOOST_FUNCTION_MAX_ARGS_DEFINED != BOOST_FUNCTION_MAX_ARGS)
#if !defined(BOOST_FUNCTION_MAX_ARGS_DEFINED)
#define BOOST_FUNCTION_MAX_ARGS_DEFINED 0
#endif
#include <functional> // unary_function, binary_function
#include <boost/preprocessor/iterate.hpp>
#include <boost/detail/workaround.hpp>
#ifndef BOOST_FUNCTION_MAX_ARGS
# define BOOST_FUNCTION_MAX_ARGS 10
#endif // BOOST_FUNCTION_MAX_ARGS
// Include the prologue here so that the use of file-level iteration
// in anything that may be included by function_template.hpp doesn't break
#include <boost/function/detail/prologue.hpp>
@ -64,3 +70,5 @@
# include BOOST_PP_ITERATE()
# undef BOOST_PP_ITERATION_PARAMS_1
#endif
#endif // !defined(BOOST_FUNCTION_MAX_ARGS_DEFINED) || (BOOST_FUNCTION_MAX_ARGS_DEFINED != BOOST_FUNCTION_MAX_ARGS)