re PR c++/61038 (g++ -E is unusable with UDL strings)

gcc/testsuite/

2014-05-20  Edward Smith-Rowland  <3dw4rd@verizon.net>

	PR C++/61038
	* g++.dg/cpp0x/pr61038.C: New.

libcpp/

2014-05-20  Edward Smith-Rowland  <3dw4rd@verizon.net>

	PR C++/61038
	* macro.c (stringify_arg (cpp_reader *, macro_arg *)):
	Check for user-defined literal strings and user-defined literal chars
	to escape necessary characters.

From-SVN: r210666

gcc/testsuite/ChangeLog

+2014-05-20  Edward Smith-Rowland  <3dw4rd@verizon.net>
+
+	PR C++/61038
+	* g++.dg/cpp0x/pr61038.C: New.
+
 2014-05-20  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/58753

gcc/testsuite/g++.dg/cpp0x/pr61038.C

+// PR c++/61038
+// { dg-do compile { target c++11 } }
+
+#include <cstring>
+#include <cstdlib>
+
+void
+operator "" _s(const char *, unsigned long)
+{ }
+
+void
+operator "" _t(const char)
+{ }
+
+#define QUOTE(s) #s
+#define QQUOTE(s) QUOTE(s)
+
+int
+main()
+{
+  const char *s = QQUOTE(QUOTE("hello"_s));
+  const char *t = QUOTE("\"hello\"_s");
+  if (strcmp(s, t) != 0)
+    abort();
+
+  const char *c = QQUOTE(QUOTE('"'_t));
+  const char *d = QUOTE("'\"'_t");
+  if (strcmp(c, d) != 0)
+    abort();
+
+  const char *e = QQUOTE(QUOTE('\''_t));
+  const char *f = QUOTE("'\\''_t");
+  if (strcmp(e, f) != 0)
+    abort();
+
+  const char *g = QQUOTE(QUOTE('\\'_t));
+  const char *h = QUOTE("'\\\\'_t");
+  if (strcmp(g, h) != 0)
+    abort();
+}

libcpp/ChangeLog

+2014-05-20  Edward Smith-Rowland  <3dw4rd@verizon.net>
+
+	PR C++/61038
+	* macro.c (stringify_arg (cpp_reader *, macro_arg *)):
+	Check for user-defined literal strings and user-defined literal chars
+	to escape necessary characters.
+
 2014-05-20  Richard Biener  <rguenther@suse.de>
 
 	* configure.ac: Copy gcc logic of detecting a 64bit type.

libcpp/macro.c

@@ -494,6 +494,9 @@ stringify_arg (cpp_reader *pfile, macro_arg *arg)
 		   || token->type == CPP_STRING16 || token->type == CPP_CHAR16
 		   || token->type == CPP_UTF8STRING);
 
+      escape_it = escape_it || cpp_userdef_string_p (token->type)
+			    || cpp_userdef_char_p (token->type);
+
       /* Room for each char being written in octal, initial space and
 	 final quote and NUL.  */
       len = cpp_token_len (token);