GNU Info

(m4.info)Divnum

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Diversion numbers
=================

   The builtin `divnum':

     divnum

expands to the number of the current diversion.

     Initial divnum
     =>Initial 0
     divert(1)
     Diversion one: divnum
     divert(2)
     Diversion two: divnum
     divert
     =>
     ^D
     =>
     =>Diversion one: 1
     =>
     =>Diversion two: 2

   The last call of `divert' without argument is necessary, since the
undiverted text would otherwise be diverted itself.