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Docstring prevents constant from being fully byte-compiled


From: Joe Riel
Subject: Docstring prevents constant from being fully byte-compiled
Date: Sun, 10 Mar 2013 23:26:47 -0700

Byte-compile the following (Emacs 23.3.1)

(defconst A "A")
(defconst B "B")
(defconst AB1
  (concat constA constB))
(defconst AB2
  (concat constA constB)
  "docstring")

I get

(byte-code "\303B\304\305!\210\306B\307\310!\210\311B\312 \nP!\207" 
[current-load-list constA constB A (lambda (#1=#:defconst-tmp-var) (defconst A 
#1#)) "A" B (lambda (#2=#:defconst-tmp-var) (defconst B #2#)) "B" AB1 (lambda 
(#3=#:defconst-tmp-var) (defconst AB1 #3#))] 3)
#@11 docstring
(defconst AB2 (concat constA constB) (#$ . 800))

Note that AB2 retains the original (non-byte-compiled) definition, while AB1 
does not.  
Is that actually the case?  Is AB2 byte-compiled, or not?
Why does the presence of the docstring make a difference?


-- 
Joe Riel




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