text: #pragma once
  
  ////////////////////////////////////////////////////////////////////////////////
  // The MIT License (MIT)
  //
  // Copyright (c) 2018 Nicholas Frechette & Animation Compression Library contributors
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in all
  // copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  // SOFTWARE.
  ////////////////////////////////////////////////////////////////////////////////
  
  #include <rtm/impl/compiler_utils.h>
  
  #include <type_traits>
  
  #if !defined(__GNUG__) || defined(_LIBCPP_VERSION) || defined(_GLIBCXX_USE_CXX11_ABI)
  	#include <cstdlib>
  #else
  	#include <stdlib.h>
  #endif
  
  //////////////////////////////////////////////////////////////////////////
  // Because this library is made entirely of headers, we have no control over the
  // compilation flags used. However, in some cases, certain options must be forced.
  // To do this, every header is wrapped in two macros to push and pop the necessary
  // pragmas.
  //////////////////////////////////////////////////////////////////////////
  #if defined(RTM_COMPILER_MSVC)
  	#define ACL_IMPL_FILE_PRAGMA_PUSH \
  		/* Disable fast math, it can hurt precision for little to no performance gain due to the high level of hand tuned optimizations. */ \
  		__pragma(float_control(precise, on, push))
  
  	#define ACL_IMPL_FILE_PRAGMA_POP \
  		__pragma(float_control(pop))
  #else
  	#define ACL_IMPL_FILE_PRAGMA_PUSH
  	#define ACL_IMPL_FILE_PRAGMA_POP
  #endif
  
  namespace acl
  {
  	//////////////////////////////////////////////////////////////////////////
  	// The version of the STL shipped with versions of GCC older than 5.1 are missing a number of type traits and functions,
  	// such as std::is_trivially_default_constructible.
  	// In this case, we polyfill the proper standard names using the deprecated std::has_trivial_default_constructor.
  	// This must also be done when the compiler is clang when it makes use of the GCC implementation of the STL,
  	// which is the default behavior on linux. Properly detecting the version of the GCC STL used by clang cannot
  	// be done with the __GNUC__  macro, which are overridden by clang. Instead, we check for the definition
  	// of the macro ``_GLIBCXX_USE_CXX11_ABI`` which is only defined with GCC versions greater than 5.
  	//////////////////////////////////////////////////////////////////////////
  	namespace acl_impl
  	{
  #if !defined(__GNUG__) || defined(_LIBCPP_VERSION) || defined(_GLIBCXX_USE_CXX11_ABI)
  		using std::strtoull;
  
  		template <class Type>
  		using is_trivially_default_constructible = std::is_trivially_default_constructible<Type>;
  #else
  		using ::strtoull;
  
  		template <class Type>
  		using is_trivially_default_constructible = std::has_trivial_default_constructor<Type>;
  #endif
  	}
  }
  
  //////////////////////////////////////////////////////////////////////////
  // Silence compiler warnings within switch cases that fall through
  // Note: C++17 has [[fallthrough]];
  //////////////////////////////////////////////////////////////////////////
  #if defined(RTM_COMPILER_GCC) || defined(RTM_COMPILER_CLANG)
  	#if defined(__has_attribute) && __has_attribute(fallthrough)
  		#define ACL_SWITCH_CASE_FALLTHROUGH_INTENTIONAL __attribute__ ((fallthrough))
  	#else
  		#define ACL_SWITCH_CASE_FALLTHROUGH_INTENTIONAL (void)0
  	#endif
  #else
  	#define ACL_SWITCH_CASE_FALLTHROUGH_INTENTIONAL (void)0
  #endif
  