.he 'POP417''Page %'
.fo 'Steven Hardy'- % -'June 1978'
.ce 2
Version 417 of POP11
====================
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This new version of POP11 differs hardly at all from 415.
The two changes are:
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1)#When the system starts compiling a function definition
it discards any existing function of that name.
Thus if the the new version has an syntactic error
a subsequent call of the function will produce an 'undefined function'
error and not, as in previous versions, a call of the already
existing version of the function.
Furthermore, the space occupied by the old defintion of the
function is released at the beginning of recompilation (and not the end).
This can be useful if the function being recompiled is very
large.
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2)#CHARIN immediately echoes 'null' characters to CHAROUT.
This is primarily for the benefit of system hackers who want to communicate
with subsiduary POP11 processes via 'pipes'.
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