Text Formatting ⇒ Double Active Characters in Xe(La)TeX

[Laurentius]

Is it possible to acheive the effect of \addfontfeature{Mapping=tex-text} with (double) active characters?

I need `` to produce a left quotation mark that is detected by the below code snippet in "gloss-french.ldf".

Code: Select all

\XeTeXcharclass `\“ \french@punctguillstart
\XeTeXinterchartoks \french@punctguillstart 255
   = {\nobreak\thinspace\xpg@nospace}% "«  " -> "«~"