Variable: fontification-functions
fontification-functions is a buffer-local variable defined in xdisp.c.
Documentation
List of functions to call to fontify regions of text.
Each function is called with one argument POS. Functions must
fontify a region starting at POS in the current buffer, and give
fontified regions the property fontified.
Probably introduced at or before Emacs version 21.1.
Source Code
// Defined in /usr/src/emacs/src/xdisp.c
DEFVAR_LISP ("fontification-functions", Vfontification_functions,
doc: /* List of functions to call to fontify regions of text.
Each function is called with one argument POS. Functions must
fontify a region starting at POS in the current buffer, and give
fontified regions the property `fontified'. */);