Re: [NTG-context] Colon as non-operator

2016-05-31 Thread Hans Hagen 

On 5/31/2016 5:53 PM, Hans Åberg wrote:



On 31 May 2016, at 17:04, Hans Hagen  wrote:

On 5/31/2016 4:18 PM, Hans Åberg wrote:

It is possible to get the symbol : COLON U+003A to expand to \colon, instead of 
the ratio operator, as it is now?



it's a commented option


What does that mean?


that it has been considered but rejected already


i.e. we decided not to do that because the normal colon would be obscured then 
(just like overloading a period is not realistic)


But can one not have it only in math, the way you suggested before, as in the 
code below?


so what about (1:2) and so? do we really always want that colon symbol?


Anyway, for Unicode fonts that support RATIO U+2236, input : COLON U+003A 
should properly give that RATIO in the output, and \colon should output a 
COLON. :-)


\setupbodyfont[xits,10pt]

\appendtoks
  \catcode`:=\activecatcode
  \letcharcode `: \colon
\to \everymathematics


You love active characters yes? Try to avoid them. More efficient is:

\Umathcode"3A="6"00"002236 % : to \colon

in one of your styles


\starttext

Note: the colon in text should behave normally.
\startformula
  \startalign
\NC f\NC\colon A→B \NR % Outputs ∶ RATIO U+2236
\NC f\NC: A→B \NR  % : COLON U+003A, outputs ∶ RATIO U+2236
\NC f\NC ∶ A→B \NR % ∶ RATIO U+2236
  \stopalign
\stopformula

\stoptext


could be a style (or option) but then more for a set of such symbols, 
not for just one


Hans


-
  Hans Hagen | PRAGMA ADE
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
  tel: 038 477 53 69 | www.pragma-ade.com | www.pragma-pod.nl
-
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Re: [NTG-context] Colon as non-operator

2016-05-31 Thread Hans Åberg 

> On 31 May 2016, at 17:04, Hans Hagen  wrote:
> 
> On 5/31/2016 4:18 PM, Hans Åberg wrote:
>> It is possible to get the symbol : COLON U+003A to expand to \colon, instead 
>> of the ratio operator, as it is now?

> it's a commented option

What does that mean?

> i.e. we decided not to do that because the normal colon would be obscured 
> then (just like overloading a period is not realistic)

But can one not have it only in math, the way you suggested before, as in the 
code below?

Anyway, for Unicode fonts that support RATIO U+2236, input : COLON U+003A 
should properly give that RATIO in the output, and \colon should output a 
COLON. :-)


\setupbodyfont[xits,10pt]

\appendtoks
  \catcode`:=\activecatcode
  \letcharcode `: \colon
\to \everymathematics

\starttext

Note: the colon in text should behave normally.
\startformula
  \startalign
\NC f\NC\colon A→B \NR % Outputs ∶ RATIO U+2236
\NC f\NC: A→B \NR  % : COLON U+003A, outputs ∶ RATIO U+2236
\NC f\NC ∶ A→B \NR % ∶ RATIO U+2236
  \stopalign
\stopformula

\stoptext


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Re: [NTG-context] Colon as non-operator

2016-05-31 Thread Hans Hagen 

On 5/31/2016 4:18 PM, Hans Åberg wrote:

It is possible to get the symbol : COLON U+003A to expand to \colon, instead of 
the ratio operator, as it is now? The latter is rather rare in pure math, and 
in addition, it seems to have been reversed in the implementation with ∶ RATIO 
U+2236, cf. example below.

\setupbodyfont[xits,10pt]

\startformula
  \startalign
\NC f\NC\colon A→B \NR % Produces ∶ RATIO U+2236
\NC f\NC: A→B \NR  % : COLON U+003A
\NC f\NC ∶ A→B \NR % ∶ RATIO U+2236
  \stopalign
\stopformula


it's a commented option i.e. we decided not to do that because the 
normal colon would be obscured then (just like overloading a period is 
not realistic)


Hans

-
  Hans Hagen | PRAGMA ADE
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
  tel: 038 477 53 69 | www.pragma-ade.com | www.pragma-pod.nl
-
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[NTG-context] Colon as non-operator

2016-05-31 Thread Hans Åberg 
It is possible to get the symbol : COLON U+003A to expand to \colon, instead of 
the ratio operator, as it is now? The latter is rather rare in pure math, and 
in addition, it seems to have been reversed in the implementation with ∶ RATIO 
U+2236, cf. example below.

\setupbodyfont[xits,10pt]

\startformula
  \startalign
\NC f\NC\colon A→B \NR % Produces ∶ RATIO U+2236
\NC f\NC: A→B \NR  % : COLON U+003A
\NC f\NC ∶ A→B \NR % ∶ RATIO U+2236
  \stopalign
\stopformula


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