... characters into the expression.Two backslashes, ‘\\’, are required before the parentheses and verticalbars: the first backslash quotes the following backslash in Emacs; and thesecond indicates ... Function”, page 241. 164 Chapter 12: Regular Expression SearchesTypeM-x compile RET etags help RETto see a list of the options accepted by etags as well as a list of supportedlanguages.The etags ... supportedlanguages.The etags program handles more than 20 languages, including EmacsLisp, Common Lisp, Scheme, C, C++, Ada, Fortran, Java, LaTeX, Pascal,Perl, Python, Texinfo, makefiles, and...