The BOOST_PP_CAT macro concatenates its arguments after they have been expanded.
	
	Usage
		
			BOOST_PP_CAT(a, b)
		
	Arguments
		
			- a
- 
				The left operand of the concatenation.
			
- b
- 
				The right operand of the concatenation.
			
Remarks
		
			The preprocessor token-pasting operator (##) prevents arguments from expanding. 
			This macro allows its arguments to expand before concatenation.
		
		
			Concatenation must not result in an invocation of a macro that uses BOOST_PP_CAT. 
			If that happens, BOOST_PP_CAT will not expand the second time.
		
	Requirements
		
	Sample Code