1 files changed, 68 insertions, 0 deletions
diff --git a/compilerplugins/clang/test/stringconcatliterals.cxx b/compilerplugins/clang/test/stringconcatliterals.cxx
new file mode 100644
index 0000000000..0575eb252b
--- /dev/null
+++ b/compilerplugins/clang/test/stringconcatliterals.cxx
@@ -0,0 +1,68 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <sal/config.h>
+
+#include <ostream>
+
+#include <rtl/string.hxx>
+#include <rtl/ustring.hxx>
+
+#pragma clang diagnostic ignored "-Wunknown-warning-option" // for Clang < 13
+#pragma clang diagnostic ignored "-Wunused-but-set-variable"
+
+#define FOO "foo"
+#define FOOu u"foo"
+
+void f(std::ostream& s1)
+{
+    static constexpr char foo[] = "foo";
+    static constexpr char16_t foou[] = u"foo";
+    s1 << "foo"
+       << "foo";
+    // expected-error@-1 {{replace '<<' between string literals with juxtaposition}}
+    s1 << "foo" << FOO;
+    // expected-error@-1 {{replace '<<' between string literals with juxtaposition}}
+    s1 << "foo" << foo;
+    s1 << "foo" << OString("foo");
+    // expected-error@-1 {{replace '<<' between string literals with juxtaposition}}
+    s1 << "foo" << OString(FOO);
+    // expected-error@-1 {{replace '<<' between string literals with juxtaposition}}
+    s1 << "foo" << OString(foo);
+    s1 << "foo" << OUString("foo");
+    // expected-error@-1 {{replace '<<' between string literals with juxtaposition}}
+    s1 << "foo" << OUString(FOO);
+    // expected-error@-1 {{replace '<<' between string literals with juxtaposition}}
+    s1 << "foo" << OUString(foo);
+    s1 << "foo" << __func__;
+    OString s2;
+    s2 = "foo" + OString("foo");
+    // expected-error@-1 {{replace '+' between string literals with juxtaposition}}
+    s2 = "foo" + OString(FOO);
+    // expected-error@-1 {{replace '+' between string literals with juxtaposition}}
+    s2 = "foo" + OString(foo);
+    s2 = "foo" + OStringLiteral("foo");
+    // expected-error@-1 {{replace '+' between string literals with juxtaposition}}
+    s2 = "foo" + OStringLiteral(FOO);
+    // expected-error@-1 {{replace '+' between string literals with juxtaposition}}
+    s2 = "foo" + OStringLiteral(foo);
+    OUString s3;
+    s3 = "foo" + OUString("foo");
+    // expected-error@-1 {{replace '+' between string literals with juxtaposition}}
+    s3 = "foo" + OUString(FOO);
+    // expected-error@-1 {{replace '+' between string literals with juxtaposition}}
+    s3 = "foo" + OUString(foo);
+    s3 = "foo" + OUStringLiteral(u"foo");
+    // expected-error@-1 {{replace '+' between string literals with juxtaposition}}
+    s3 = "foo" + OUStringLiteral(FOOu);
+    // expected-error@-1 {{replace '+' between string literals with juxtaposition}}
+    s3 = "foo" + OUStringLiteral(foou);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */