Preprocessing directives

preprocessing-file:  


group$_{\mathsf{opt}}$ 


group:  


group-part  


group group-part  


group-part:  


pp-tokens$_{\mathsf{opt}}$ new-line  


if-section  


control-line  


if-section:  


if-group elif-groups$_{\mathsf{opt}}$ else-group$_{\mathsf{opt}}$ endif-line  


if-group:  

		# if     constant-expression new-line group$_{\mathsf{opt}}$ 

		# ifdef  identifier new-line group$_{\mathsf{opt}}$ 

		# ifndef identifier new-line group$_{\mathsf{opt}}$ 



elif-groups:  


elif-group  


elif-groups elif-group  


elif-group:  

		# elif   constant-expression new-line group$_{\mathsf{opt}}$ 


else-group:  

		# else   new-line group$_{\mathsf{opt}}$ 


endif-line:  

		# endif  new-line  


control-line:  

		# include pp-tokens new-line  

		# define  identifier replacement-list new-line  

		# define  identifier lparen identifier-list$_{\mathsf{opt}}$ ) replacement-list new-line  

		# undef   identifier new-line  

		# line    pp-tokens new-line  

		# error   pp-tokens$_{\mathsf{opt}}$ new-line  

		# pragma  pp-tokens$_{\mathsf{opt}}$ new-line  

		#         new-line  


lparen:  


the left-parenthesis character without preceding white-space 


replacement-list:  


pp-tokens$_{\mathsf{opt}}$ 


pp-tokens:  


preprocessing-token  


pp-tokens preprocessing-token  


new-line:  


the new-line character