c-beginning-of-macroc-beginning-of-macro is a compiled Lisp function in `
cc-engine.el'. (c-beginning-of-macro &optional LIM) :around advice: `ad-Advice-c-beginning-of-macro' Go to the beginning of a preprocessor directive. Leave point at the beginning of the directive and return t if in one, otherwise return nil and leave point unchanged. Note that this function might do hidden buffer changes. See the comment at the start of cc-engine.el for more info.