The BOOST_PP_ENUM_TRAILING macro generates a comma-separated list with a leading comma.
	
	Usage
		
			BOOST_PP_ENUM_TRAILING(count, macro, data)
		
	Arguments
		
			- count
- 
				The number of repetitious calls to macro. 
				Valid values range from 0 to BOOST_PP_LIMIT_REPEAT.
			
- macro
- 
				A ternary operation of the form macro(z, n, data). 
				This macro is expanded by BOOST_PP_ENUM with the next available repetition depth,
				the current repetition number, and the auxiliary data argument. 
			
- data
- 
				Auxiliary data passed to macro.
			
Remarks
		
			This macro expands to the comma-separated sequence:
			
				, macro(z, 0, data), macro(z, 1, data), ... macro(z, count - 1, data)
			
		
			The z value that is passed to macro represents the next available repetition dimension. 
			Other macros that have _Z suffix variants internally use BOOST_PP_REPEAT--for example, BOOST_PP_ENUM_PARAMS and BOOST_PP_ENUM_PARAMS_Z. 
			Using these _Z versions is not strictly necessary, but passing the z value (that is passed to macro) to these macros allows them to reenter BOOST_PP_REPEAT with maximum efficiency.
		
		
			To directly use this z value, rather than simply passing it to another macro, see BOOST_PP_ENUM_TRAILING_z.
		
	See Also
		
	Requirements
		
	Sample Code