* Math letters in commands
@ 2016-09-11 20:48 Hans Åberg
2016-09-12 18:25 ` Hans Åberg
0 siblings, 1 reply; 8+ messages in thread
From: Hans Åberg @ 2016-09-11 20:48 UTC (permalink / raw)
To: ConTeXt users
Just found that the code below does not work as intended, because \𝐝𝐢𝐦 will be parsed as \𝐝 followed by 𝐢𝐦. Can’t tell if it ought to be changed, though one could think other cases where it might be natural. The command definition of \𝐝 works though.
\setupbodyfont[xits,10pt]
\setupmathematics[lcgreek=normal, default=normal]
\definemathcommand[𝐝𝐢𝐦][nolop]{\mfunction{𝐝𝐢𝐦}}
\definemathcommand[𝐝][nolop]{\mfunction{𝐝𝐢𝐦}}
\starttext
Note that $\𝐝𝐢𝐦 𝑉 = 𝖫$, although $\dim 𝑉 = 4$.
\stoptext
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^ permalink raw reply [flat|nested] 8+ messages in thread* Re: Math letters in commands
2016-09-11 20:48 Math letters in commands Hans Åberg
@ 2016-09-12 18:25 ` Hans Åberg
2016-09-12 19:45 ` Hans Hagen
0 siblings, 1 reply; 8+ messages in thread
From: Hans Åberg @ 2016-09-12 18:25 UTC (permalink / raw)
To: mailing list for ConTeXt users
Found a workaround: The idea is to use \csname …\endcsname with two delimiters not likely to be used in math mode, below chosen to ‘…’.
But then there seems to be a bug in the LuaTex \letcharcode command: There must be a character between “$” and the first occurring \activecatcode letter. Possibly this also causes a bug in \startformula, as discussed before.
\setupbodyfont[xits,10pt]
\setupmathematics[lcgreek=normal, default=normal]
\def\usemathcommand#1’{\csname #1\endcsname}
\appendtoks
\catcode`‘=\activecatcode
\letcharcode `‘ \usemathcommand
\to \everymathematics
\definemathcommand[𝐝𝐢𝐦][nolop]{\mfunction{𝐝𝐢𝐦}}
\starttext
Note that $ ‘𝐝𝐢𝐦’ 𝑉 = 𝖫$, although $\dim 𝑉 = 4$.
And a bug: $‘𝐝𝐢𝐦’ 𝑉$.
\stoptext
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^ permalink raw reply [flat|nested] 8+ messages in thread* Re: Math letters in commands
2016-09-12 18:25 ` Hans Åberg
@ 2016-09-12 19:45 ` Hans Hagen
2016-09-12 20:02 ` Hans Åberg
2016-09-12 20:09 ` Hans Åberg
0 siblings, 2 replies; 8+ messages in thread
From: Hans Hagen @ 2016-09-12 19:45 UTC (permalink / raw)
To: mailing list for ConTeXt users
On 9/12/2016 8:25 PM, Hans Åberg wrote:
> Found a workaround: The idea is to use \csname …\endcsname with two delimiters not likely to be used in math mode, below chosen to ‘…’.
>
> But then there seems to be a bug in the LuaTex \letcharcode command: There must be a character between “$” and the first occurring \activecatcode letter. Possibly this also causes a bug in \startformula, as discussed before.
it's not a bug .. tex looks ahead for a second $ and in the process
expands the next token which happens to be a letter at that point so it
gets injected as letter (it's the way tex works)
\appendtoks
\catcode`𝐝\lettercatcode
\catcode`𝐢\lettercatcode
\catcode`𝐦\lettercatcode
\to \everymathematics
\definemathcommand[𝐝𝐢𝐦][nolop]{\mfunction{𝐦𝐢𝐝}}
\starttext
Note that $ \𝐝𝐢𝐦 𝑉 = 𝖫$, although $\dim 𝑉 = 4$.
And a bug: $\𝐝𝐢𝐦 𝑉$.
\stoptext
fwiw, the current beta makes math characters also letters now
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
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^ permalink raw reply [flat|nested] 8+ messages in thread* Re: Math letters in commands
2016-09-12 19:45 ` Hans Hagen
@ 2016-09-12 20:02 ` Hans Åberg
2016-09-13 5:57 ` Hans Hagen
2016-09-12 20:09 ` Hans Åberg
1 sibling, 1 reply; 8+ messages in thread
From: Hans Åberg @ 2016-09-12 20:02 UTC (permalink / raw)
To: mailing list for ConTeXt users; +Cc: Hans Hagen
> On 12 Sep 2016, at 21:45, Hans Hagen <pragma@wxs.nl> wrote:
>
> On 9/12/2016 8:25 PM, Hans Åberg wrote:
>> But then there seems to be a bug in the LuaTex \letcharcode command: There must be a character between “$” and the first occurring \activecatcode letter. Possibly this also causes a bug in \startformula, as discussed before.
>
> it's not a bug .. tex looks ahead for a second $ and in the process expands the next token which happens to be a letter at that point so it gets injected as letter (it's the way tex works)
I’m not sure what you mean here: I must write $ ‘𝐝𝐢𝐦’ 𝑉$, because $‘𝐝𝐢𝐦’ 𝑉$ will not see the \catcode`‘=\activecatcode. So LuaTeX must see an ordinary letter after $ before it can see an \activecatcode character.
It does not happen with TeX using
\catcode`\‘=\active
\def‘#1’{\csname #1\endcsname}
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^ permalink raw reply [flat|nested] 8+ messages in thread* Re: Math letters in commands
2016-09-12 20:02 ` Hans Åberg
@ 2016-09-13 5:57 ` Hans Hagen
2016-09-13 8:16 ` Hans Åberg
2016-09-13 8:27 ` Hans Åberg
0 siblings, 2 replies; 8+ messages in thread
From: Hans Hagen @ 2016-09-13 5:57 UTC (permalink / raw)
To: Hans Åberg, mailing list for ConTeXt users
On 9/12/2016 10:02 PM, Hans Åberg wrote:
>
>> On 12 Sep 2016, at 21:45, Hans Hagen <pragma@wxs.nl> wrote:
>>
>> On 9/12/2016 8:25 PM, Hans Åberg wrote:
>
>>> But then there seems to be a bug in the LuaTex \letcharcode command: There must be a character between “$” and the first occurring \activecatcode letter. Possibly this also causes a bug in \startformula, as discussed before.
>>
>> it's not a bug .. tex looks ahead for a second $ and in the process expands the next token which happens to be a letter at that point so it gets injected as letter (it's the way tex works)
>
> I’m not sure what you mean here: I must write $ ‘𝐝𝐢𝐦’ 𝑉$, because $‘𝐝𝐢𝐦’ 𝑉$ will not see the \catcode`‘=\activecatcode. So LuaTeX must see an ordinary letter after $ before it can see an \activecatcode character.
>
> It does not happen with TeX using
> \catcode`\‘=\active
> \def‘#1’{\csname #1\endcsname}
sure, but when you do
\appendtoks
\catcode`\‘=\active
\def‘#1’{\csname #1\endcsname}
\to ...
only tokens get added to the register ... so the ‘ after the \def is not
active (yet)
in addition when tex sees a $ it will look for a next token (in case
it's a $ for display mode) and it sees a quote (no everymath doen then)
which it will push back
Hans
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: Math letters in commands
2016-09-13 5:57 ` Hans Hagen
@ 2016-09-13 8:16 ` Hans Åberg
2016-09-13 8:27 ` Hans Åberg
1 sibling, 0 replies; 8+ messages in thread
From: Hans Åberg @ 2016-09-13 8:16 UTC (permalink / raw)
To: Hans Hagen; +Cc: mailing list for ConTeXt users
> On 13 Sep 2016, at 07:57, Hans Hagen <pragma@wxs.nl> wrote:
>
> On 9/12/2016 10:02 PM, Hans Åberg wrote:
>> It does not happen with TeX using
>> \catcode`\‘=\active
>> \def‘#1’{\csname #1\endcsname}
>
> sure, but when you do
>
> \appendtoks
> \catcode`\‘=\active
> \def‘#1’{\csname #1\endcsname}
> \to ...
>
> only tokens get added to the register ... so the ‘ after the \def is not active (yet)
>
> in addition when tex sees a $ it will look for a next token (in case it's a $ for display mode) and it sees a quote (no everymath doen then) which it will push back
OK. TeX does not parse the way I expected.
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^ permalink raw reply [flat|nested] 8+ messages in thread* Re: Math letters in commands
2016-09-13 5:57 ` Hans Hagen
2016-09-13 8:16 ` Hans Åberg
@ 2016-09-13 8:27 ` Hans Åberg
1 sibling, 0 replies; 8+ messages in thread
From: Hans Åberg @ 2016-09-13 8:27 UTC (permalink / raw)
To: Hans Hagen; +Cc: mailing list for ConTeXt users
> On 13 Sep 2016, at 07:57, Hans Hagen <pragma@wxs.nl> wrote:
> sure, but when you do
>
> \appendtoks
> \catcode`\‘=\active
> \def‘#1’{\csname #1\endcsname}
> \to …
FYI, this does not work for me; I must use LuaTeX \letcharcode:
\def\usemathcommand#1’{\csname #1\endcsname}
\appendtoks
\catcode`‘=\activecatcode
\letcharcode `‘ \usemathcommand
\to \everymathematics
Then “$” must be followed by a character other than ‘ for this command to be seen, but it works with “$$”.
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^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: Math letters in commands
2016-09-12 19:45 ` Hans Hagen
2016-09-12 20:02 ` Hans Åberg
@ 2016-09-12 20:09 ` Hans Åberg
1 sibling, 0 replies; 8+ messages in thread
From: Hans Åberg @ 2016-09-12 20:09 UTC (permalink / raw)
To: mailing list for ConTeXt users; +Cc: Hans Hagen
> On 12 Sep 2016, at 21:45, Hans Hagen <pragma@wxs.nl> wrote:
> fwiw, the current beta makes math characters also letters now
I saw it. Fine!
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2016-09-11 20:48 Math letters in commands Hans Åberg
2016-09-12 18:25 ` Hans Åberg
2016-09-12 19:45 ` Hans Hagen
2016-09-12 20:02 ` Hans Åberg
2016-09-13 5:57 ` Hans Hagen
2016-09-13 8:16 ` Hans Åberg
2016-09-13 8:27 ` Hans Åberg
2016-09-12 20:09 ` Hans Åberg
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