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define-inlinable* : a define-inlinable with lambda*-behaviour.

From: Linus Björnstam
Subject: define-inlinable* : a define-inlinable with lambda*-behaviour.
Date: Fri, 24 Apr 2020 09:13:22 +0200
User-agent: Cyrus-JMAP/3.3.0-dev0-351-g9981f4f-fmstable-20200421v1

I just found that (ice-9 optargs) has defmacro*, which made me think about a 
question that has popped up on irc about once every 4 months: why isn't there a 

I have a working implementation, and I want to know if there is any interest to 
include it in guile. Either in boot-9.scm, or as a friend of defmacro* in 
(ice-9 opt-args).

A straight forward simple implementation would have a regression over 
define-inlinable: define-inlinable does arg count validation, which is a lot 
less simple when you have keywords and/or optional arguments. Would this be an 
acceptable regression if they are implemented as two distinct macros?

If one does a proper define-inlinable*, it can be used to implement 
define-inlinable (since that would be the simple case for it).

What do the maintainers think?
  Linus Björnstam

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