Move selftest::test_diagnostic_context to its own header

It's useful to not rely on global_dc in selftests, so this patch
moves class selftest::test_diagnostic_context from
diagnostic-show-locus.c to a new header and source file.

gcc/ChangeLog:
	* Makefile.in (OBJS-libcommon): Add selftest-diagnostic.o.
	* diagnostic-show-locus.c: Include "selftest-diagnostic.h".
	(class selftest::test_diagnostic_context): Move to...
	* selftest-diagnostic.c: New file.
	* selftest-diagnostic.h: New file.

From-SVN: r254354

1 files changed, 62 insertions, 0 deletions

diff --git a/gcc/selftest-diagnostic.c b/gcc/selftest-diagnostic.c
new file mode 100644
index 0000000..2018062
--- /dev/null
+++ b/gcc/selftest-diagnostic.c
@@ -0,0 +1,62 @@
+/* Selftest support for diagnostics.
+   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "diagnostic.h"
+#include "selftest.h"
+#include "selftest-diagnostic.h"
+
+/* The selftest code should entirely disappear in a production
+   configuration, hence we guard all of it with #if CHECKING_P.  */
+
+#if CHECKING_P
+
+namespace selftest {
+
+/* Implementation of class selftest::test_diagnostic_context.  */
+
+test_diagnostic_context::test_diagnostic_context ()
+{
+  diagnostic_initialize (this, 0);
+  show_caret = true;
+  show_column = true;
+  start_span = start_span_cb;
+}
+
+test_diagnostic_context::~test_diagnostic_context ()
+{
+  diagnostic_finish (this);
+}
+
+/* Implementation of diagnostic_start_span_fn, hiding the
+   real filename (to avoid printing the names of tempfiles).  */
+
+void
+test_diagnostic_context::start_span_cb (diagnostic_context *context,
+					expanded_location exploc)
+{
+  exploc.file = "FILENAME";
+  default_diagnostic_start_span_fn (context, exploc);
+}
+
+} // namespace selftest
+
+#endif /* #if CHECKING_P */