[luatex] kerning with delimiters with opentype math fonts

Hans Hagen pragma at wxs.nl
Sun Feb 19 13:24:08 CET 2017

On 2/18/2017 6:25 PM, Ulrike Fischer wrote:
> Am Sat, 18 Feb 2017 16:12:35 +0100 schrieb Hans Hagen:
>> It's a font issue
> Why does one get the faulty spacing only with \left/right? E.g. in
> this context version only the first is wrong:
> \starttext
> $\left|T \right|$ $|T|$
> \stoptext

italic correction is between characters and a \right is a fence and more 
a construct where the inter-whatever spacing + staircase kerns apply so 
it boils a bit down to what a sequence of chars is (for instance a \left 
\right delimiter is an extensible character and as such not really a 

it's a bit of a fuzzy area (i've seen different specs over time) ... of 
course i can think of some more control options in the engine

(the problem is that at one time i had code in context that analyzed 
this and acted upon it correcting the engine but then inconsistent fonts 
show up and one has to make choices)


                                           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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