Revert "raw_ostream: add operator<< overload for std::error_code"

This reverts commit r368849, because it breaks some bots (e.g.
llvm-clang-x86_64-win-fast).

It turns out this is not as NFC as we had hoped, because operator== will
consider two std::error_codes to be distinct even though they both hold
"success" values if they have different categories.

llvm-svn: 368854

1 files changed, 1 insertions, 8 deletions

diff --git a/llvm/unittests/Support/ErrorTest.cpp b/llvm/unittests/Support/ErrorTest.cpp
index ec5c30b5..c4a9f3e 100644
--- a/llvm/unittests/Support/ErrorTest.cpp
+++ b/llvm/unittests/Support/ErrorTest.cpp
@@ -933,7 +933,7 @@ public:
 
 class TestErrorCategory : public std::error_category {
 public:
-  const char *name() const noexcept override { return "test_error"; }
+  const char *name() const noexcept override { return "error"; }
   std::string message(int Condition) const override {
     switch (static_cast<test_error_code>(Condition)) {
     case test_error_code::unspecified:
@@ -975,11 +975,4 @@ TEST(Error, SubtypeStringErrorTest) {
             0);
 }
 
-TEST(Error, error_codeErrorMessageTest) {
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_EQ(make_error_code(test_error_code::unspecified),
-                make_error_code(test_error_code::error_2)),
-      "Which is: An unknown error has occurred. (test_error:1)");
-}
-
 } // namespace