Edit: /usr/include/boost/hana/config.hpp (7152B)
/*!
@file
Defines configuration macros used throughout the library.
@copyright Louis Dionne 2013-2017
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
*/
#ifndef BOOST_HANA_CONFIG_HPP
#define BOOST_HANA_CONFIG_HPP
#include
//////////////////////////////////////////////////////////////////////////////
// Detect the compiler
//////////////////////////////////////////////////////////////////////////////
#if defined(_MSC_VER) && !defined(__clang__) // MSVC
// This must be checked first, because otherwise it produces a fatal
// error due to unrecognized #warning directives used below.
# if _MSC_VER < 1915
# pragma message("Warning: the native Microsoft compiler is not supported due to lack of proper C++14 support.")
# else
// 1. Active issues
// Multiple copy/move ctors
# define BOOST_HANA_WORKAROUND_MSVC_MULTIPLECTOR_106654
// 2. Issues fixed in the development branch of MSVC
// Forward declaration of class template member function returning decltype(auto)
# define BOOST_HANA_WORKAROUND_MSVC_DECLTYPEAUTO_RETURNTYPE_662735
// 3. Issues fixed conditionally
// Requires __declspec(empty_bases)
// Empty base optimization
# define BOOST_HANA_WORKAROUND_MSVC_EMPTYBASE
// Requires /experimental:preprocessor
// Variadic macro expansion
# if !defined(_MSVC_TRADITIONAL) || _MSVC_TRADITIONAL
# define BOOST_HANA_WORKAROUND_MSVC_PREPROCESSOR_616033
# endif
# endif
#elif defined(__clang__) && defined(_MSC_VER) // Clang-cl (Clang for Windows)
# define BOOST_HANA_CONFIG_CLANG BOOST_HANA_CONFIG_VERSION( \
__clang_major__, __clang_minor__, __clang_patchlevel__)
#elif defined(__clang__) && defined(__apple_build_version__) // Apple's Clang
# if __apple_build_version__ >= 6020049
# define BOOST_HANA_CONFIG_CLANG BOOST_HANA_CONFIG_VERSION(3, 6, 0)
# endif
#elif defined(__clang__) // genuine Clang
# define BOOST_HANA_CONFIG_CLANG BOOST_HANA_CONFIG_VERSION( \
__clang_major__, __clang_minor__, __clang_patchlevel__)
#elif defined(__GNUC__) // GCC
# define BOOST_HANA_CONFIG_GCC BOOST_HANA_CONFIG_VERSION( \
__GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__)
#endif
//////////////////////////////////////////////////////////////////////////////
// Check the compiler for general C++14 capabilities
//////////////////////////////////////////////////////////////////////////////
#if (__cplusplus < 201400)
# if defined(_MSC_VER)
# if _MSC_VER < 1915
# pragma message("Warning: Your compiler doesn't provide C++14 or higher capabilities. Try adding the compiler flag '-std=c++14' or '-std=c++1y'.")
# endif
# else
# warning "Your compiler doesn't provide C++14 or higher capabilities. Try adding the compiler flag '-std=c++14' or '-std=c++1y'."
# endif
#endif
//////////////////////////////////////////////////////////////////////////////
// Caveats and other compiler-dependent options
//////////////////////////////////////////////////////////////////////////////
// `BOOST_HANA_CONFIG_HAS_CONSTEXPR_LAMBDA` enables some constructs requiring
// `constexpr` lambdas, which are in the language starting with C++17.
//
// Always disabled for now because Clang only has partial support for them
// (captureless lambdas only).
#if defined(__cplusplus) && __cplusplus > 201402L
# define BOOST_HANA_CONSTEXPR_STATELESS_LAMBDA constexpr
// # define BOOST_HANA_CONFIG_HAS_CONSTEXPR_LAMBDA
#else
# define BOOST_HANA_CONSTEXPR_STATELESS_LAMBDA /* nothing */
#endif
// `BOOST_HANA_CONSTEXPR_LAMBDA` expands to `constexpr` if constexpr lambdas
// are supported and to nothing otherwise.
#if defined(BOOST_HANA_CONFIG_HAS_CONSTEXPR_LAMBDA)
# define BOOST_HANA_CONSTEXPR_LAMBDA constexpr
#else
# define BOOST_HANA_CONSTEXPR_LAMBDA /* nothing */
#endif
//////////////////////////////////////////////////////////////////////////////
// Namespace macros
//////////////////////////////////////////////////////////////////////////////
#define BOOST_HANA_NAMESPACE_BEGIN namespace boost { namespace hana {
#define BOOST_HANA_NAMESPACE_END }}
//////////////////////////////////////////////////////////////////////////////
// Library features and options that can be tweaked by users
//////////////////////////////////////////////////////////////////////////////
#if defined(BOOST_HANA_DOXYGEN_INVOKED) || \
(defined(NDEBUG) && !defined(BOOST_HANA_CONFIG_DISABLE_ASSERTIONS))
//! @ingroup group-config
//! Disables the `BOOST_HANA_*_ASSERT` macro & friends.
//!
//! When this macro is defined, the `BOOST_HANA_*_ASSERT` macro & friends
//! are disabled, i.e. they expand to nothing.
//!
//! This macro is defined automatically when `NDEBUG` is defined. It can
//! also be defined by users before including this header or defined on
//! the command line.
# define BOOST_HANA_CONFIG_DISABLE_ASSERTIONS
#endif
#if defined(BOOST_HANA_DOXYGEN_INVOKED)
//! @ingroup group-config
//! Disables concept checks in interface methods.
//!
//! When this macro is not defined (the default), tag-dispatched methods
//! will make sure the arguments they are passed are models of the proper
//! concept(s). This can be very helpful in catching programming errors,
//! but it is also slightly less compile-time efficient. You should
//! probably always leave the checks enabled (and hence never define this
//! macro), except perhaps in translation units that are compiled very
//! often but whose code using Hana is modified very rarely.
# define BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS
#endif
#if defined(BOOST_HANA_DOXYGEN_INVOKED)
//! @ingroup group-config
//! Enables usage of the "string literal operator template" GNU extension.
//!
//! That operator is not part of the language yet, but it is supported by
//! both Clang and GCC. This operator allows Hana to provide the nice `_s`
//! user-defined literal for creating compile-time strings.
//!
//! When this macro is not defined, the GNU extension will be not used
//! by Hana. Because this is a non-standard extension, the macro is not
//! defined by default.
# define BOOST_HANA_CONFIG_ENABLE_STRING_UDL
#endif
#if defined(BOOST_HANA_DOXYGEN_INVOKED)
//! @ingroup group-config
//! Enables additional assertions and sanity checks to be done by Hana.
//!
//! When this macro is defined (it is __not defined__ by default),
//! additional sanity checks may be done by Hana. These checks may
//! be costly to perform, either in terms of compilation time or in
//! terms of execution time. These checks may help debugging an
//! application during its initial development, but they should not
//! be enabled as part of the normal configuration.
# define BOOST_HANA_CONFIG_ENABLE_DEBUG_MODE
#endif
#endif // !BOOST_HANA_CONFIG_HPP