re PR preprocessor/48740 (Raw C++0x strings and trigraphs mix badly)

PR preprocessor/48740
	* lex.c (lex_raw_string): When raw string ends with
	??) followed by raw prefix and ", ensure it is preprocessed
	with ??) rather than ??].

	* c-c++-common/raw-string-11.c: New test.

From-SVN: r172903

gcc/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2011-04-24  Jakub Jelinek  <jakub@redhat.com>
+
+	PR preprocessor/48740
+	* c-c++-common/raw-string-11.c: New test.
+
 2011-04-23  John David Anglin  <dave.anglin@nrc-cnrc.ca>
 
 	* gcc.dg/pr48616.c (dg-options): Add -fno-common to options on

gcc/testsuite/c-c++-common/raw-string-11.c

@@ -0,0 +1,13 @@
+// PR preprocessor/48740
+// { dg-options "-std=gnu99 -trigraphs -save-temps" { target c } }
+// { dg-options "-std=c++0x -save-temps" { target c++ } }
+// { dg-do run }
+
+int main ()
+{
+  return __builtin_memcmp (R"raw(foo%sbar%sfred%sbob?????)raw",
+			   "foo%sbar%sfred%sbob?""?""?""?""?",
+			   sizeof ("foo%sbar%sfred%sbob?""?""?""?""?"));
+}
+
+// { dg-final { cleanup-saved-temps } }

libcpp/ChangeLog

@@ -1,3 +1,10 @@
+2011-04-24  Jakub Jelinek  <jakub@redhat.com>
+
+	PR preprocessor/48740
+	* lex.c (lex_raw_string): When raw string ends with
+	??) followed by raw prefix and ", ensure it is preprocessed
+	with ??) rather than ??].
+
 2011-04-20  Jim Meyering  <meyering@redhat.com>
 
 	* files.c (destroy_cpp_file): Remove useless if-before-free.

libcpp/lex.c

@@ -1410,7 +1410,9 @@ lex_raw_string (cpp_reader *pfile, cpp_token *token, const uchar *base,
 				       raw_prefix_len) == 0
 			   && cur[raw_prefix_len+1] == '"')
 		    {
-		      cur += raw_prefix_len+2;
+		      BUF_APPEND (")", 1);
+		      base++;
+		      cur += raw_prefix_len + 2;
 		      goto break_outer_loop;
 		    }
 		  else