[tex-k] incorrect explanation of <argument>s in Chapter 25 of The METAFONTbook

胡亚捷 (Hu Yajie) 2500418497 at qq.com
Sun Feb 14 05:02:51 CET 2021

Here's a minor glitch in The METAFONTbook, which I assume you can defer
until the next tuneup.

Page C210, line -13 implies that the <argument>s in the syntaxes of
Chapter 25 stand for "expr" arguments, but they actually stand for
arguments of any kind. In my earlier report
I pointed out that future pen arguments are permitted if you say
"def foo secondary p" instead of "def foo expr p", and Knuth added a
<future pen argument> in the 2021 tuneup, so he clearly had arguments
of any kind (primary/secondary/tertiary/expr/to a for loop/etc.) in his mind.


My earlier reports:

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