From f297ebafdcdf5d5a8c3ef74c9906de67998e5aa7 Mon Sep 17 00:00:00 2001
From: Jonathan Wakely <jwakely@redhat.com>
Date: Thu, 14 Dec 2017 11:47:42 +0000
Subject: [PATCH] Test whitespace handling in std::complex extraction

	* testsuite/26_numerics/complex/inserters_extractors/char/dr2714.cc:
	Add tests using noskipws.

From-SVN: r255632
---
 libstdc++-v3/ChangeLog                        |  3 ++
 .../inserters_extractors/char/dr2714.cc       | 28 +++++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index b20a277a085..e035302bed4 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,5 +1,8 @@
 2017-12-14  Jonathan Wakely  <jwakely@redhat.com>
 
+	* testsuite/26_numerics/complex/inserters_extractors/char/dr2714.cc:
+	Add tests using noskipws.
+
 	* testsuite/26_numerics/complex/dr2714.cc: Move to ...
 	* testsuite/26_numerics/complex/inserters_extractors/char/dr2714.cc:
 	... Here. Remove duplicate header and dg-options. Check first invalid
diff --git a/libstdc++-v3/testsuite/26_numerics/complex/inserters_extractors/char/dr2714.cc b/libstdc++-v3/testsuite/26_numerics/complex/inserters_extractors/char/dr2714.cc
index 17fb8a249d9..952c52f4a2b 100644
--- a/libstdc++-v3/testsuite/26_numerics/complex/inserters_extractors/char/dr2714.cc
+++ b/libstdc++-v3/testsuite/26_numerics/complex/inserters_extractors/char/dr2714.cc
@@ -145,10 +145,38 @@ test03()
   in.clear();
 }
 
+void
+test04()
+{
+  // Test noskipws handling
+  std::istringstream in;
+  const char* bad_inputs[] = {
+    " 1", " (2)", "( 2)", "(2 )", "(2 ,3)", "(2,3 )", 0
+  };
+  const std::complex<double> c0(-1, -1);
+  std::complex<double> c;
+  for (int i = 0; bad_inputs[i]; ++i)
+  {
+    c = c0;
+    in.clear();
+    in.str(bad_inputs[i]);
+    in >> std::noskipws >> c;
+    VERIFY( in.fail() );
+    VERIFY( c == c0 );
+
+    in.clear();
+    in.str(bad_inputs[i]);
+    in >> std::skipws >> c;
+    VERIFY( !in.fail() );
+    VERIFY( c != c0 );
+  }
+}
+
 int
 main()
 {
   test01();
   test02();
   test03();
+  test04();
 }