examples/debug.m4 - m4 - Git at Google


            
            define(`countdown', `$1 ifelse(eval($1 > 0), 1, `countdown(decr($1))', `Liftoff')')

            
            debugmode(`aeqc')

            
            traceon(`countdown')

            
            countdown(2)
	define(`countdown', `$1 ifelse(eval($1 > 0), 1, `countdown(decr($1))', `Liftoff')')
	debugmode(`aeqc')
	traceon(`countdown')
	countdown(2)