[ADT] Add llvm::StringLiteral.

StringLiteral is a wrapper around a string literal useful for
replacing global tables of char arrays with global tables of
StringRefs that can initialized in a constexpr context, avoiding
the invocation of a global constructor.

Differential Revision: https://reviews.llvm.org/D27686

llvm-svn: 289551

1 files changed, 6 insertions, 0 deletions

diff --git a/llvm/unittests/ADT/StringRefTest.cpp b/llvm/unittests/ADT/StringRefTest.cpp
index c1cc558..5b6822e 100644
--- a/llvm/unittests/ADT/StringRefTest.cpp
+++ b/llvm/unittests/ADT/StringRefTest.cpp
@@ -1002,4 +1002,10 @@ TEST(StringRefTest, DropWhileUntil) {
   EXPECT_EQ("", Taken);
 }
 
+TEST(StringRefTest, StringLiteral) {
+  constexpr StringLiteral Strings[] = {"Foo", "Bar"};
+  EXPECT_EQ(StringRef("Foo"), Strings[0]);
+  EXPECT_EQ(StringRef("Bar"), Strings[1]);
+}
+
 } // end anonymous namespace