[libcxx] r295422 - add implicit deduction guide tests for string_view

[Eric Fiselier via cfe-commits]

Author: ericwf
Date: Fri Feb 17 00:59:11 2017
New Revision: 295422

URL: http://llvm.org/viewvc/llvm-project?rev=295422&view=rev
Log:
add implicit deduction guide tests for string_view

Added:
    libcxx/trunk/test/std/strings/string.view/string.view.cons/implicit_deduction_guides.pass.cpp

Added: libcxx/trunk/test/std/strings/string.view/string.view.cons/implicit_deduction_guides.pass.cpp
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/strings/string.view/string.view.cons/implicit_deduction_guides.pass.cpp?rev=295422&view=auto
==============================================================================
--- libcxx/trunk/test/std/strings/string.view/string.view.cons/implicit_deduction_guides.pass.cpp (added)
+++ libcxx/trunk/test/std/strings/string.view/string.view.cons/implicit_deduction_guides.pass.cpp Fri Feb 17 00:59:11 2017
@@ -0,0 +1,71 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03, c++11, c++14
+// UNSUPPORTED: libcpp-no-deduction-guides
+
+// FIXME(EricWF): As of 16/Feb/2017 Clang hits an assertion when compiling this
+// test with '-g' (as the sanitizers do).
+// XFAIL: ubsan, asan, msan, tsan
+
+// <string_view>
+
+// Test that the constructors offered by std::basic_string_view are formulated
+// so they're compatible with implicit deduction guides.
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "test_allocator.h"
+#include "constexpr_char_traits.hpp"
+
+// Overloads
+// ---------------
+// (1)  basic_string_view() - NOT TESTED
+// (2)  basic_string_view(const basic_string_view&)
+// (3)  basic_string_view(const CharT*, size_type)
+// (4)  basic_string_view(const CharT*)
+int main()
+{
+  using TestSizeT = test_allocator<char>::size_type;
+  { // Testing (1)
+    // Nothing TODO. Cannot deduce without any arguments.
+  }
+  { // Testing (2)
+    const std::string_view sin("abc");
+    std::basic_string_view s(sin);
+    ASSERT_SAME_TYPE(decltype(s), std::string_view);
+    assert(s == "abc");
+
+    using WSV = std::basic_string_view<wchar_t, constexpr_char_traits<wchar_t>>;
+    const WSV win(L"abcdef");
+    std::basic_string_view w(win);
+    ASSERT_SAME_TYPE(decltype(w), WSV);
+    assert(w == L"abcdef");
+  }
+  { // Testing (3)
+    std::basic_string_view s("abc", 2);
+    ASSERT_SAME_TYPE(decltype(s), std::string_view);
+    assert(s == "ab");
+
+    std::basic_string_view w(L"abcdef", 4);
+    ASSERT_SAME_TYPE(decltype(w), std::wstring_view);
+    assert(w == L"abcd");
+  }
+  { // Testing (4)
+    std::basic_string_view s("abc");
+    ASSERT_SAME_TYPE(decltype(s), std::string_view);
+    assert(s == "abc");
+
+    std::basic_string_view w(L"abcdef");
+    ASSERT_SAME_TYPE(decltype(w), std::wstring_view);
+    assert(w == L"abcdef");
+  }
+}