[NTG-pdftex] [pdftex-Bugs][4314] \ifincsname nesting bug

[pdftex-bugs at sarovar.org]

Bugs item #4314, was opened at 2010-07-27 05:47
Status: Open
Priority: 3
Submitted By: The Thanh Han (hanthethanh)
Assigned to: The Thanh Han (hanthethanh)
Summary: \ifincsname nesting bug 
Category: Primitives
Group: None
Resolution: Accepted


Initial Comment:
from http://tug.org/pipermail/pdftex/2010-July/008439.html

,--------,
| Hi,
| 
| This was reported on the XeTeX mailing list but I'm reposting here since I think it's more appropriate for this list. (Fixes to pdfTeX can then propagate to the other engine(s).)
| 
| Here's a minimal example:
| 
| \def\a{\ifincsname T \else F \fi}
| \expandafter\string\csname
|     1\a
|     \expandafter\string\csname2\a\endcsname
|     3\a
| \endcsname
| 
| #1 and #2 are "true" but #3 is "false". It seems like the first \endcsname has reset the "am i in a csname" switch rather than popped it back to its previous value.
| 
| Cheers,
| -- Will
`--------`


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