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bug#20144: 25.0.50; Functions using fboundp not known to be defined
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From: |
Stefan Monnier |
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Subject: |
bug#20144: 25.0.50; Functions using fboundp not known to be defined |
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Date: |
Thu, 19 Mar 2015 15:27:45 -0400 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux) |
severity 20144 wishlist
thanks
> (if (fboundp 'car)
> (defalias 'mycar 'car)
> (defun mycar (_l) (error "what")))
(defalias 'mycar
(if (fboundp 'car) 'car (lambda (_l) (error "what"))))
The difference is one of the two versions requires reasoning
(simple/trivial for you, but beyond the reach of the simple
byte-compiler we're using), whereas the other doesn't.
Admittedly, when you need to define two versions of a *set* of
functions, depending on a single test, the above trick of sinking the
testing into the `defalias' ends up being a bit ugly/inconvenient.
Stefan