define(bump,`define(`$1',incr($1))')dnl define(counter,0)dnl counter bump(`counter')counter bump(`counter')counter
On Thu, Dec 2, 2021 at 11:49 AM Grant Taylor via Discussion list for the GNU M4 <m4-discuss@gnu.org> wrote: > > Hi, > > On 12/2/21 7:11 AM, Paolo Amoroso wrote: > > Is it possible to create an m4 macro expanding to the next integer > > of a global counter each time it's called? > > I don't know. > > I /feel/ like it should be possible. > > But my brain is definitely not in m4 mode this morning. > > > In other words, assuming the counter has an initial value (e.g. 0), > > these calls to such a nextcount macro: > > > > First call: nextcount > > Second call: nextcount > > Third call: nextcount > > > > should generate the following output: > > > > First call: 1 > > Second call: 2 > > Third call: 3 > > > > I'm stumped as I'm not sure updating the global state of a counter > > is even possible with m4. Is there any way? > > It sounds like you have some code that you're working on. Can you share > a (sanitized version of) it so that we know how you're doing things and > how complex / level of nesting the environment you're working on is? > > > > -- > Grant. . . . > unix || die >
