selftest: introduce class auto_fix_quotes

This patch moves a workaround for locale differences from a
selftest in pretty-print.c to selftest.h/c to make it reusable; I need
this for a selftest in a followup patch.

gcc/ChangeLog:
	* pretty-print.c (selftest::test_pp_format): Move save and restore
	of quotes to class auto_fix_quotes, and add an instance.
	* selftest.c: Include "intl.h".
	(selftest::auto_fix_quotes::auto_fix_quotes): New ctor.
	(selftest::auto_fix_quotes::~auto_fix_quotes): New dtor.
	* selftest.h (selftest::auto_fix_quotes): New class.

From-SVN: r262317

1 files changed, 20 insertions, 0 deletions

diff --git a/gcc/selftest.h b/gcc/selftest.h
index d66fb93..54fc488 100644
--- a/gcc/selftest.h
+++ b/gcc/selftest.h
@@ -113,6 +113,26 @@ class temp_source_file : public named_temp_file
 		    const char *content);
 };
 
+/* RAII-style class for avoiding introducing locale-specific differences
+   in strings containing localized quote marks, by temporarily overriding
+   the "open_quote" and "close_quote" globals to something hardcoded.
+
+   Specifically, the C locale's values are used:
+   - open_quote becomes "`"
+   - close_quote becomes "'"
+   for the lifetime of the object.  */
+
+class auto_fix_quotes
+{
+ public:
+  auto_fix_quotes ();
+  ~auto_fix_quotes ();
+
+ private:
+  const char *m_saved_open_quote;
+  const char *m_saved_close_quote;
+};
+
 /* Various selftests involving location-handling require constructing a
    line table and one or more line maps within it.