[erlang-questions] Stateful match specifications

Guilherme Andrade g@REDACTED
Sun Mar 12 16:21:11 CET 2017

Hi list,

I've recently wondered whether it would be useful (and feasible) to have
support for 'stateful match specifications'; i.e., something along the
lines of:

   ets:fun2ms(fun (Head, StateAcc) when Guards -> {Body, NewStateAcc} end,

... as well as a corresponding extension to the raw match specifications
format. These could then be optionally and transparently used in ets,
tracing, etc.

What do you think? Perhaps the 'eeps' mailing list is a more appropriate
place for making this proposal?

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