http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45399
--- Comment #5 from Kay Hayen <kayhayen at gmx dot de> 2010-11-08 17:43:23 UTC --- (In reply to comment #4) > The motivating examples in the original raw strings proposal are for > simplifying regular expressions and HTML markup, there's no mention of binary > blobs. > http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n2053.html I tend to agree that avoiding of backslashes is already something. But raw strings are definitely also useful to store arbitrary data. I use them in Nuitka to store the binary blobs from marshaled constants. Currently I have to have Python code like this to do that: def _encodeString( self, value ): delimiter = self._pickRawDelimiter( value ) start = 'R"' + delimiter + "(" end = ")" + delimiter + '"' result = start + value + end # Replace \n, \r and \0 in the raw strings. The \0 gives a silly warning from # gcc (bug reported) and \n and \r even lead to wrong strings. Somehow the # parser of the C++ doesn't yet play nice with these. def decide( match ): if match.group(0) == "\n": return end + r' "\n" ' + start elif match.group(0) == "\r": return end + r' "\r" ' + start else: return end + r' "\0" ' + start result = re.sub( "\n|\r|" + chr(0), decide, result ) As you can see, I somehow believe that "\n" and "\r" are not interpreted correctly and replace these (should it be necessary, at least at one time it was?) and then added the same for chr(0) later on. I consider the necessity to do each of those a bug. In my mind all it should take would be a delimiter not present in the string. Still I am thankful for raw strings as those are way easier to get right than a readable Python to plain C++ string translation. And the intention of a C++ feature, since when did it ever come to limit its use? I admit that files with "\0" inside are not the sane thing to write. But for me C++ is something I generate as a temporary intermediate step. Please provide a means to disable that warning without disabling everything, or even stop it for raw strings. Yours, Kay PS: If you are interested in what I do with Nuitka, feel free to visit http://kayhayen24x7.homelinux.org/blog/nuitka-a-python-compiler/what-is-nuitka/
