Re: [XeTeX] Confused (why are ignored characters not "removed from the input" as per Eijkhout's TeX by Topic ?)

2023-04-16 Thread Philip Taylor (Hellenic Institute)
On 16/04/2023 19:30, Zdeněk Wagner wrote: The mouth reads the input and assigns categories, thus it sees ^^I as the character with code 0x09, assigns category 9 to it (ignored character) and sends this token to the stomach. Wel, that's not what Knuth says at Exercise 7.3, Zdeněk  — [Q] Some

Re: [XeTeX] Confused (why are ignored characters not "removed from the input" as per Eijkhout's TeX by Topic ?)

2023-04-16 Thread Zdenek Wagner
ne 16. 4. 2023 v 18:44 odesílatel Philip Taylor (Hellenic Institute) napsal: > > On 16/04/2023 17:37, Jonathan Kew wrote: > > First note: I see the same result with plain TeX. So not a XeTeX issue. > > Agreed, but as I use only XeTeX this seemed the right place to ask. I did > test with PdfTeX (

Re: [XeTeX] Confused (why are ignored characters not "removed from the input" as per Eijkhout's TeX by Topic ?)

2023-04-16 Thread Philip Taylor (Hellenic Institute)
On 16/04/2023 17:37, Jonathan Kew wrote: First note: I see the same result with plain TeX. So not a XeTeX issue. Agreed, but as I use only XeTeX this seemed the right place to ask. I did test with PdfTeX (not having plain TeX in my TeXworks armoury) and PdfTeX did much the same but put a real

Re: [XeTeX] Confused (why are ignored characters not "removed from the input" as per Eijkhout's TeX by Topic ?)

2023-04-16 Thread Jonathan Kew
On 16/04/2023 17:16, Philip Taylor (RHBNC) wrote: Given — \catcode 9 = 9 \let ~ = \undefined ^^I~ \end why does XeTeX report This is XeTeX, Version 3.141592653-2.6-0.93 (TeX Live 2021/W32TeX) (preloaded format=xetex) restricted \write18 enabled. entering extended mode (./untitled

[XeTeX] Confused (why are ignored characters not "removed from the input" as per Eijkhout's TeX by Topic ?)

2023-04-16 Thread Philip Taylor (RHBNC)
Given — \catcode 9 = 9 \let ~ = \undefined ^^I~ \end why does XeTeX report This is XeTeX, Version 3.141592653-2.6-0.93 (TeX Live 2021/W32TeX) (preloaded format=xetex) restricted \write18 enabled. entering extended mode (./untitled-10.tex ! Undefined control sequence. l.3 ^^I~ ? T