From: Alan Mackenzie <acm@muc.de>
Date: Sat, 20 Aug 2011 15:23:04 +0000 (+0000)
Subject: Fontify CPP expressions correctly when starting in the middle of such a
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Fontify CPP expressions correctly when starting in the middle of such a
construct.  Mainly for when jit-lock etc. starts a chunk here.

cc-fonts.el (c-font-lock-context): new buffer local variable.
(c-make-font-lock-search-form): new function, extracted from
c-make-font-lock-search-function.
(c-make-font-lock-search-function): Use the above function.
(c-make-font-lock-context-search-function): New function.
(c-cpp-matchers): Enhance the preprocessor expression case with the above
function
(c-font-lock-complex-decl-prepare):  Test for being in a CPP form which
takes an expression.

cc-langs.el (c-cpp-expr-intro-re): New lang-variable.
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b4a6d72f9d9acf04d959523e57face4721297553