[NTG-pdftex] [ pdftex-Patches-466 ] \primitive and \ifprimitive
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Tue Jan 17 22:58:46 CET 2006
Patches item #466, was opened at 2006-01-07 17:22
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Category: Primitives
Group: v1.40.0
Status: Open
>Resolution: Accepted
Priority: 4
Submitted By: Taco Hoekwater (taco)
Assigned to: Martin Schröder (oneiros)
Summary: \primitive and \ifprimitive
Initial Comment:
This patch implements two new primitives:
\primitive \par
This will run the 'primitive' command \par, even if it
has been re- or undefined in the meantime. \primitive
is not expandable, because it may be asked to execute
unexpandable primitives as well as expandable ones.
If you supply a nonexistant primitive, it will be
ignored (no error is raised).
The second primitive is a new type of \if:
\ifprimitive \par ... \else .. \fi
returns true if the current meaning of \par is the
'primitive' command \par.
The patch is against alpha-20051226, i hope that is not
too old (?). I expect to do at least one minor update
during the beta cycle, after the pdftex code is
flattened. It was quite a struggle to make this
change file work ok, and as a result, there are
a few ugly web hacks.
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