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c2724603c9
Discussed starting at <http://lists.gnu.org/archive/html/bison-patches/2009-08/msg00036.html>. * src/scan-gram.l (SC_ESCAPED_STRING, SC_ESCAPED_CHARACTER): For a \0 and similar escape sequences meaning the null character, report an invalid escape sequence instead of an invalid null character because the latter does not actually appear in the user's input. In all escape sequence complaints, don't escape the initial backslash, and don't quote when the sequence appears at the end of the complaint line unless there's whitespace that quotearg won't escape. Consistently say "invalid" not "unrecognized". Consistently prefer "empty character literal" over "extra characters in character literal" warning for invalid escape sequences; that is, consistently discard those sequences. * tests/input.at (Bad escapes in literals): New.