Implement string_view from the library fundamentals TS (n4023). Also works in C++11 and 03, with reduced functionality (mostly in the area of constexpr)
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@210659 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/experimental/string.view/string.view.ops/copy.pass.cpp b/test/experimental/string.view/string.view.ops/copy.pass.cpp
new file mode 100644
index 0000000..96246d2
--- /dev/null
+++ b/test/experimental/string.view/string.view.ops/copy.pass.cpp
@@ -0,0 +1,92 @@
+//===----------------------------------------------------------------------===//
+//
+// 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.
+//
+//===----------------------------------------------------------------------===//
+
+
+// <string_view>
+
+// size_type copy(charT* s, size_type n, size_type pos = 0) const;
+
+// Throws: out_of_range if pos > size().
+// Remarks: Let rlen be the smaller of n and size() - pos.
+// Requires: [s, s+rlen) is a valid range.
+// Effects: Equivalent to std::copy_n(begin() + pos, rlen, s).
+// Returns: rlen.
+
+
+#include <experimental/string_view>
+#include <cassert>
+
+template<typename CharT>
+void test1 ( std::experimental::basic_string_view<CharT> sv, size_t n, size_t pos ) {
+ const size_t rlen = std::min ( n, sv.size() - pos );
+
+ CharT *dest1 = new CharT [rlen + 1]; dest1[rlen] = 0;
+ CharT *dest2 = new CharT [rlen + 1]; dest2[rlen] = 0;
+
+ try {
+ sv.copy(dest1, n, pos);
+ std::copy_n(sv.begin() + pos, rlen, dest2);
+
+ for ( size_t i = 0; i <= rlen; ++i )
+ assert ( dest1[i] == dest2[i] );
+ }
+ catch ( const std::out_of_range & ) { assert ( pos > sv.size()); }
+ delete [] dest1;
+ delete [] dest2;
+}
+
+
+template<typename CharT>
+void test ( const CharT *s ) {
+ typedef std::experimental::basic_string_view<CharT> string_view_t;
+
+ string_view_t sv1 ( s );
+
+ test1(sv1, 0, 0);
+ test1(sv1, 1, 0);
+ test1(sv1, 20, 0);
+ test1(sv1, sv1.size(), 0);
+ test1(sv1, 20, string_view_t::npos);
+
+ test1(sv1, 0, 3);
+ test1(sv1, 2, 3);
+ test1(sv1, 100, 3);
+ test1(sv1, 100, string_view_t::npos);
+
+ test1(sv1, sv1.size(), string_view_t::npos);
+
+ test1(sv1, sv1.size() + 1, 0);
+ test1(sv1, sv1.size() + 1, 1);
+ test1(sv1, sv1.size() + 1, string_view_t::npos);
+
+}
+
+int main () {
+ test ( "ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
+ test ( "ABCDE");
+ test ( "a" );
+ test ( "" );
+
+ test ( L"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
+ test ( L"ABCDE" );
+ test ( L"a" );
+ test ( L"" );
+
+#if __cplusplus >= 201103L
+ test ( u"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
+ test ( u"ABCDE" );
+ test ( u"a" );
+ test ( u"" );
+
+ test ( U"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
+ test ( U"ABCDE" );
+ test ( U"a" );
+ test ( U"" );
+#endif
+}