text: /// @ref gtx_range
  /// @file glm/gtx/range.hpp
  /// @author Joshua Moerman
  ///
  /// @defgroup gtx_range GLM_GTX_range
  /// @ingroup gtx
  ///
  /// Include <glm/gtx/range.hpp> to use the features of this extension.
  ///
  /// Defines begin and end for vectors and matrices. Useful for range-based for loop.
  /// The range is defined over the elements, not over columns or rows (e.g. mat4 has 16 elements).
  
  #pragma once
  
  // external
  #include "../detail/setup.hpp"
  
  #if GLM_MESSAGES == GLM_ENABLE && !defined(GLM_EXT_INCLUDED)
  #	ifndef GLM_ENABLE_EXPERIMENTAL
  #		pragma message("GLM: GLM_GTX_range is an experimental extension and may change in the future. Use #define GLM_ENABLE_EXPERIMENTAL before including it, if you really want to use it.")
  #	else
  #		pragma message("GLM: GLM_GTX_range extension included")
  #	endif
  #endif
  
  #include "../gtc/type_ptr.hpp"
  #include "../gtc/vec1.hpp"
  
  namespace glm
  {
  	/// @addtogroup gtx_range
  	/// @{
  
  #	if GLM_COMPILER & GLM_COMPILER_VC
  #		pragma warning(push)
  #		pragma warning(disable : 4100) // unreferenced formal parameter
  #	endif
  
  	template<typename T, qualifier Q>
  	inline length_t components(vec<1, T, Q> const& v)
  	{
  		return v.length();
  	}
  
  	template<typename T, qualifier Q>
  	inline length_t components(vec<2, T, Q> const& v)
  	{
  		return v.length();
  	}
  
  	template<typename T, qualifier Q>
  	inline length_t components(vec<3, T, Q> const& v)
  	{
  		return v.length();
  	}
  
  	template<typename T, qualifier Q>
  	inline length_t components(vec<4, T, Q> const& v)
  	{
  		return v.length();
  	}
  
  	template<typename genType>
  	inline length_t components(genType const& m)
  	{
  		return m.length() * m[0].length();
  	}
  
  	template<typename genType>
  	inline typename genType::value_type const * begin(genType const& v)
  	{
  		return value_ptr(v);
  	}
  
  	template<typename genType>
  	inline typename genType::value_type const * end(genType const& v)
  	{
  		return begin(v) + components(v);
  	}
  
  	template<typename genType>
  	inline typename genType::value_type * begin(genType& v)
  	{
  		return value_ptr(v);
  	}
  
  	template<typename genType>
  	inline typename genType::value_type * end(genType& v)
  	{
  		return begin(v) + components(v);
  	}
  
  #	if GLM_COMPILER & GLM_COMPILER_VC
  #		pragma warning(pop)
  #	endif
  
  	/// @}
  }//namespace glm
  