[dev-context] new font trickery

14 Mar 2013

      Hi,

I implemented this:

\setupbodyfont[pagella]

\starttext

\dorecurse{10}{
     \dorecurse{20}{
         \start
             What \recursedepth\recurselevel\space
             \feature{smallcaps}
             What \recursedepth\recurselevel\space
             \feature{oldstyle}
             What \recursedepth\recurselevel\space
         \stop
     }
     \par
}

\stoptext

A reasonable fast cummulative feature switcher (so its different from 
addff cum suis). I'm not aure about the name yet. Also, such features 
have a semi-global nature in the sense that redefining 'oldstyle' has no 
effect, but that's sort of natural. Of course it's somewhat slower than 
defining a font with specific features enabled.

Hans

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