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Add tests for r286139. 

llvm-svn: 286141
This commit is contained in:
Jordan Rose 2016-11-07 20:40:16 +00:00
parent f95a459d59
commit 5caae908b7
1 changed files with 36 additions and 0 deletions
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36
llvm/unittests/ADT/StringRefTest.cpp
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@ -32,6 +32,34 @@ std::ostream &operator<<(std::ostream &OS,
}
// Check that we can't accidentally assign a temporary std::string to a
// StringRef. (Unfortunately we can't make use of the same thing with
// constructors.)
//
// Disable this check under MSVC; even MSVC 2015 isn't consistent between
// std::is_assignable and actually writing such an assignment.
#if !defined(_MSC_VER)
static_assert(
!std::is_assignable<StringRef, std::string>::value,
"Assigning from prvalue std::string");
static_assert(
!std::is_assignable<StringRef, std::string &&>::value,
"Assigning from xvalue std::string");
static_assert(
std::is_assignable<StringRef, std::string &>::value,
"Assigning from lvalue std::string");
static_assert(
std::is_assignable<StringRef, const char *>::value,
"Assigning from prvalue C string");
static_assert(
std::is_assignable<StringRef, const char * &&>::value,
"Assigning from xvalue C string");
static_assert(
std::is_assignable<StringRef, const char * &>::value,
"Assigning from lvalue C string");
#endif
namespace {
TEST(StringRefTest, Construction) {
EXPECT_EQ("", StringRef());
@ -40,6 +68,14 @@ TEST(StringRefTest, Construction) {
EXPECT_EQ("hello", StringRef(std::string("hello")));
}
TEST(StringRefTest, EmptyInitializerList) {
StringRef S = {};
EXPECT_TRUE(S.empty());
S = {};
EXPECT_TRUE(S.empty());
}
TEST(StringRefTest, Iteration) {
StringRef S("hello");
const char *p = "hello";