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/**************************************************************************
* *
* Regina - A Normal Surface Theory Calculator *
* Computational Engine *
* *
* Copyright (c) 1999-2016, Ben Burton *
* For further details contact Ben Burton (bab@debian.org). *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License as *
* published by the Free Software Foundation; either version 2 of the *
* License, or (at your option) any later version. *
* *
* As an exception, when this program is distributed through (i) the *
* App Store by Apple Inc.; (ii) the Mac App Store by Apple Inc.; or *
* (iii) Google Play by Google Inc., then that store may impose any *
* digital rights management, device limits and/or redistribution *
* restrictions that are required by its terms of service. *
* *
* This program is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* General Public License for more details. *
* *
* You should have received a copy of the GNU General Public *
* License along with this program; if not, write to the Free *
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, *
* MA 02110-1301, USA. *
* *
**************************************************************************/
/*! \file regina-core.h
* \brief Core definitions that must be included in every Regina header file.
*/
#ifndef __REGINA_CORE_H
#ifndef __DOXYGEN
#define __REGINA_CORE_H
#endif
/**
* \weakgroup engine
* @{
*/
namespace regina {
/**
* Indicates whether the given dimension is one of Regina's
* \ref stddim "standard dimensions".
* Standard dimensions offer significantly richer functionality for
* triangulations than generic dimensions.
*
* @param dim the dimension in question.
* @return \c true if and only if \a dim is one of Regina's standard dimensions.
*/
constexpr bool standardDim(int dim) {
return (dim == 2 || dim == 3 || dim == 4);
}
} // namespace regina
/**
* A synonym for \c inline, used in some special cases to avoid
* noisy warnings under Windows.
*
* Typically this macro is used with inline functions of some class or struct
* that are called by \e other inline function(s).
*
* Such a function should:
*
* - be declared as \c REGINA_INLINE_REQUIRED at the point where the function
* is first declared inside the class definition;
*
* - be declared again as \c inline when the function is later defined
* (as Regina does with all its inline functions).
*
* The reason for using REGINA_INLINE_REQUIRED in such situations is to
* avoid noisy warnings about \c dllimport attributes under Windows.
* The reason for using this particular macro instead of just the
* keyword \c inline is to remind the Regina developers not to remove it.
*
* This is not the first, and will surely not be the last, piece of code
* bloat that Windows forces upon us. Sigh.
*/
#define REGINA_INLINE_REQUIRED inline
#ifdef __DOXYGEN
// Fake definitions just for doxygen.
/**
* All non-templated, non-static functions, classes and global variables
* that are part of Regina's public interface \b must be declared with
* REGINA_API. Template classes or functions should not be declared
* with REGINA_API, but any explicit instantiations should.
* Global variables must also be declared with \c extern, as per normal.
*
* This is required for DLL linking under Windows, and also to avoid
* breakage with optimisations such as gcc's <tt>-fvisibility=hidden</tt>.
*
* Note: When building the Regina calculation engine shared library,
* REGINA_DLL_EXPORTS must be defined (this ensures that API symbols are
* marked for export). When importing (using) this library,
* REGINA_DLL_EXPORTS must \e not be defined (this ensures that API symbols
* are marked for import instead).
*/
#define REGINA_API
/**
* Classes and functions that are local to the current compilation unit
* and should not be publicly exported may be declared with REGINA_LOCAL.
* Use of this macro is optional.
*/
#define REGINA_LOCAL
/**
* Any deprecated class, function, typedef or constant in Regina's API must
* be declared with REGINA_DEPRECATED.
*
* If the user passes the compile flag <tt>-DREGINA_STRICT</tt>, then
* this macro attempts to declare the <tt>deprecated</tt> attribute.
* If it cannot work out how to declare such an attribute under the
* current compiler, then this macro expands to nothing instead.
*
* If a function or constant is declared as both REGINA_API and
* REGINA_DEPRECATED, the REGINA_DEPRECATED attribute should be listed first.
*
* Conversely, if a class or struct is declared as both REGINA_API and
* REGINA_DEPRECATED, the REGINA_API attribute should be listed first.
*
* If/when Regina moves to C++14, this macro can be replaced with
* <tt>[[deprecated]]</tt> instead.
*/
#define REGINA_DEPRECATED
/**
* Any deprecated enumeration constant in Regina's API must be
* declared with REGINA_DEPRECATED_ENUM.
*
* This macro plays a similar role to REGINA_DEPRECATED. It is defined
* separately because some compilers support the deprecated attribute on
* classes and functions, but not on enumeration constants.
*
* See the REGINA_DEPRECATED macro for further details.
*/
#define REGINA_DEPRECATED_ENUM
#else
// The real definitions go here.
// The macros below are modified from the instructions at
// http://gcc.gnu.org/wiki/Visibility (retrieved on 22 May 2011).
#if defined _WIN32 || defined __CYGWIN__
#define REGINA_HELPER_DLL_IMPORT __declspec(dllimport)
#define REGINA_HELPER_DLL_EXPORT __declspec(dllexport)
#define REGINA_HELPER_DLL_LOCAL
#else
#if __GNUC__ >= 4
#define REGINA_HELPER_DLL_IMPORT __attribute__ ((visibility("default")))
#define REGINA_HELPER_DLL_EXPORT __attribute__ ((visibility("default")))
#define REGINA_HELPER_DLL_LOCAL __attribute__ ((visibility("hidden")))
#else
#define REGINA_HELPER_DLL_IMPORT
#define REGINA_HELPER_DLL_EXPORT
#define REGINA_HELPER_DLL_LOCAL
#endif
#endif
// Assume that the library is always built as a shared library (not static).
#ifdef REGINA_DLL_EXPORTS
#define REGINA_API REGINA_HELPER_DLL_EXPORT
#else
#define REGINA_API REGINA_HELPER_DLL_IMPORT
#endif
#define REGINA_LOCAL REGINA_HELPER_DLL_LOCAL
#if defined REGINA_STRICT
// Try to find deprecated attributes that the compiler understands.
#if __llvm__
#define REGINA_DEPRECATED [[deprecated]]
#define REGINA_DEPRECATED_ENUM [[deprecated]]
#else
#if __GNUC__
#define REGINA_DEPRECATED __attribute__((deprecated))
#if __GNUC__ >= 6
#define REGINA_DEPRECATED_ENUM __attribute__((deprecated))
#else
#define REGINA_DEPRECATED_ENUM
#endif
#else
// We don't know this compiler.
#define REGINA_DEPRECATED
#define REGINA_DEPRECATED_ENUM
#endif
#endif
#else
// The user doesn't want deprecation warnings.
#define REGINA_DEPRECATED
#define REGINA_DEPRECATED_ENUM
#endif
#endif // doxygen
/*@}*/
#endif
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