aw/backcompat.md

Last active March 8, 2017 04:40

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PicoLisp backwards compatibility hacks

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This gist is meant to track backwards incompatible changes in PicoLisp, and provide simple hacks to ensure backwards compatibility with older versions.

PicoLisp v17.3.4 - March 2017

(local) syntax changes
(local) is now undefined in 32-bit
(local) [doesn't accept parameters in 64-bit]

HACK:

(and (>= (version T) (17 3 4)) (== 64 64) (from "######"))
(undef 'local)
(de local () (mapc zap (read)))
######

This checks if the running version is 64-bit and newer/equal to v17.3.4 if yes, it defines a new (local) which allows the new syntax to work on older versions of PicoLisp

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