[libcxx] Improve tests to use the UNSUPPORTED lit directive
Quite a few libcxx tests seem to follow the format:
#if _LIBCPP_STD_VER > X
// Do test.
#else
// Empty test.
#endif
We should instead use the UNSUPPORTED lit directive to exclude the test on
earlier C++ standards. This gives us a more accurate number of test passes
for those standards and avoids unnecessary conflicts with other lit
directives on the same tests.
Reviewers: bcraig, ericwf, mclow.lists
Differential revision: http://reviews.llvm.org/D20730
llvm-svn: 271108
diff --git a/libcxx/test/std/utilities/utility/exchange/exchange.pass.cpp b/libcxx/test/std/utilities/utility/exchange/exchange.pass.cpp
index 620b414..c4952f7 100644
--- a/libcxx/test/std/utilities/utility/exchange/exchange.pass.cpp
+++ b/libcxx/test/std/utilities/utility/exchange/exchange.pass.cpp
@@ -7,6 +7,7 @@
//
//===----------------------------------------------------------------------===//
+// UNSUPPORTED: c++98, c++03, c++11
// utilities
// exchange
@@ -17,7 +18,6 @@
int main()
{
-#if _LIBCPP_STD_VER > 11
{
int v = 12;
assert ( std::exchange ( v, 23 ) == 12 );
@@ -53,6 +53,4 @@
assert ( std::exchange ( s3, "" ) == s2 );
assert ( s3.size () == 0 );
}
-
-#endif
}