1 (TLA = "three letter acronym/abbreviation":-)
3 abbreviations we try to use pervasively in the system
5 As Dan Barlow pointed out long ago on the mailing list, unabbreviated
6 names are easier to deal with than abbreviated names, because you
7 never need to remember what abbreviation to use. That's true, but in a
8 language like Lisp which depends on compound names for important
9 things like structure accessors, that can lead to painful names like
10 MAKE-EXTERNAL-ENTRY-POINT-LAMBDA-EXPRESSION and associated indenting
13 In an effort to have some of the best of both worlds, I've attempted
14 to impose standard abbreviations for some things. Ideally, you don't
15 need to remember whether to abbreviate it, or what abbreviation to
16 use, because it's always the same abbreviation.
18 Some of these already were used pretty consistently in CMU CL.
19 Others not so much, but in sbcl-0.7.0 I put some effort into
20 making them more consistent.
23 GC garbage collect(ion)
24 N new: number, as in e.g. N-PASSES or N-WORD-BITS
25 old: conventional prefix for temporary variables used to
26 implement evaluate-only-once semantics in macros
27 NLX non-local exit (in compiler IR2)
28 SB storage base (in compiler IR2)
29 SC storage class (in compiler IR2)
30 TN temporary name (?) (in compiler IR2)
31 VAR variable (in the lisp entity "noun" sense, not in the
33 XEP external entry point
34 Making them even more consistent (within the limits of ANSI and
35 MOP compatibility) would probably be good.