[Python-Dev] What is the purpose of NEXT_BLOCK()? (original) (raw)

Serhiy Storchaka storchaka at gmail.com
Wed Mar 21 12:13:03 EDT 2018


21.03.18 17:13, Guido van Rossum пише:

Maybe spelunking in the Python 2 branch will help? It seems it was introduced in 2005 by Jeremy Hylton with this comment:

/* The distinction between NEWBLOCK and NEXTBLOCK is subtle.  (I'd like to find better names.)  NEWBLOCK() creates a new block and sets it as the current block.  NEXTBLOCK() also creates an implicit jump from the current block to the new block. */ That comment (and NEWBLOCK()) are no longer found in the Python 3 source.

It explains what NEXT_BLOCK() does, but not why it was needed to do this.

NEW_BLOCK() was never used at all.



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