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Compiler features soon to appear.
- To: INFO-LISPM at MIT-AI
- Subject: Compiler features soon to appear.
- From: RMS at MIT-AI (Richard M. Stallman)
- Date: Wed ,18 Jul 79 02:15:00 EDT
1) &optional (foo 69 foop) will work even if foop is special.
2) SUBSET and SUBSET-NOT will be open coded, like MAP, etc.
3) MAPs over subst-functions (such as defstruct component extractors)
will be open-coded.
4) You can use SUBST instead of LAMBDA explicitly
to cause the lambda-variables to be substituted away at compile time.
It's up to you to make sure that this won't lose due to
a) misordering of side-effects, or
b) a lambda variable with the same name as a random
non-variable symbol inside the body of the lambda.
But, in trivial cases it's often clearly ok.
One useful case is in a map: (MAPCAR '(SUBST (X) (* X X)) ...)
5) Macros can be compiled with COMPILE.
Macro definitions in files being compiled will be
sent over compiled.