[Support] Add formatv support for StringLiteral

Summary:
This is achieved by generalizing the expression selecting the StringRef
format_provider. Now, anything that can be converted to a StringRef will
use it's formatter.

Reviewers: zturner

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D29898

llvm-svn: 295064

1 files changed, 2 insertions, 0 deletions

diff --git a/llvm/unittests/Support/FormatVariadicTest.cpp b/llvm/unittests/Support/FormatVariadicTest.cpp
index 9307c6d8e09..b0c843870af 100644
--- a/llvm/unittests/Support/FormatVariadicTest.cpp
+++ b/llvm/unittests/Support/FormatVariadicTest.cpp
@@ -324,11 +324,13 @@ TEST(FormatVariadicTest, StringFormatting) {
   const char FooArray[] = "FooArray";
   const char *FooPtr = "FooPtr";
   llvm::StringRef FooRef("FooRef");
+  constexpr StringLiteral FooLiteral("FooLiteral");
   std::string FooString("FooString");
   // 1. Test that we can print various types of strings.
   EXPECT_EQ(FooArray, formatv("{0}", FooArray).str());
   EXPECT_EQ(FooPtr, formatv("{0}", FooPtr).str());
   EXPECT_EQ(FooRef, formatv("{0}", FooRef).str());
+  EXPECT_EQ(FooLiteral, formatv("{0}", FooLiteral).str());
   EXPECT_EQ(FooString, formatv("{0}", FooString).str());
 
   // 2. Test that the precision specifier prints the correct number of