Finishing touch for the std::error_code transition.

While std::error_code itself seems to work OK in all platforms, there
are few annoying differences with regards to the std::errc enumeration.

This patch adds a simple llvm enumeration, which will hopefully avoid build
breakages in other platforms and surprises as we get more uses of
std::error_code.

llvm-svn: 210920

3 files changed, 10 insertions, 7 deletions

diff --git a/llvm/unittests/Support/ErrorOrTest.cpp b/llvm/unittests/Support/ErrorOrTest.cpp
index 976a95379a1..d76e7d62421 100644
--- a/llvm/unittests/Support/ErrorOrTest.cpp
+++ b/llvm/unittests/Support/ErrorOrTest.cpp
@@ -8,6 +8,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Support/ErrorOr.h"
+#include "llvm/Support/Errc.h"
 #include "gtest/gtest.h"
 #include <memory>
 
@@ -16,7 +17,7 @@ using namespace llvm;
 namespace {
 
 ErrorOr<int> t1() {return 1;}
-ErrorOr<int> t2() { return std::errc::invalid_argument; }
+ErrorOr<int> t2() { return errc::invalid_argument; }
 
 TEST(ErrorOr, SimpleValue) {
   ErrorOr<int> a = t1();
@@ -30,7 +31,7 @@ TEST(ErrorOr, SimpleValue) {
 
   a = t2();
   EXPECT_FALSE(a);
-  EXPECT_EQ(std::errc::invalid_argument, a.getError());
+  EXPECT_EQ(a.getError(), errc::invalid_argument);
 #ifdef EXPECT_DEBUG_DEATH
   EXPECT_DEBUG_DEATH(*a, "Cannot get value when an error exists");
 #endif
diff --git a/llvm/unittests/Support/Path.cpp b/llvm/unittests/Support/Path.cpp
index babeb53a114..da1bd223957 100644
--- a/llvm/unittests/Support/Path.cpp
+++ b/llvm/unittests/Support/Path.cpp
@@ -8,6 +8,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Support/Path.h"
+#include "llvm/Support/Errc.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/MemoryBuffer.h"
@@ -355,10 +356,10 @@ TEST_F(FileSystemTest, TempFiles) {
   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
   ASSERT_EQ(fs::remove(Twine(TempPath2), false),
-            std::errc::no_such_file_or_directory);
+            errc::no_such_file_or_directory);
 
   std::error_code EC = fs::status(TempPath2.c_str(), B);
-  EXPECT_EQ(EC, std::errc::no_such_file_or_directory);
+  EXPECT_EQ(EC, errc::no_such_file_or_directory);
   EXPECT_EQ(B.type(), fs::file_type::file_not_found);
 
   // Make sure Temp2 doesn't exist.
@@ -398,7 +399,7 @@ TEST_F(FileSystemTest, TempFiles) {
     "abcdefghijklmnopqrstuvwxyz3abcdefghijklmnopqrstuvwxyz2"
     "abcdefghijklmnopqrstuvwxyz1abcdefghijklmnopqrstuvwxyz0";
   EXPECT_EQ(fs::createUniqueFile(Twine(Path270), FileDescriptor, TempPath),
-            std::errc::no_such_file_or_directory);
+            errc::no_such_file_or_directory);
 #endif
 }
 
@@ -406,7 +407,7 @@ TEST_F(FileSystemTest, CreateDir) {
   ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "foo"));
   ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "foo"));
   ASSERT_EQ(fs::create_directory(Twine(TestDirectory) + "foo", false),
-            std::errc::file_exists);
+            errc::file_exists);
   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "foo"));
 }
 
diff --git a/llvm/unittests/Transforms/DebugIR/DebugIR.cpp b/llvm/unittests/Transforms/DebugIR/DebugIR.cpp
index c4ebc5cfa4a..41df1472168 100644
--- a/llvm/unittests/Transforms/DebugIR/DebugIR.cpp
+++ b/llvm/unittests/Transforms/DebugIR/DebugIR.cpp
@@ -18,6 +18,7 @@
 #include "llvm/IR/DIBuilder.h"
 #include "llvm/IR/DebugInfo.h"
 #include "llvm/IR/Module.h"
+#include "llvm/Support/Errc.h"
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/Host.h"
 #include "llvm/Support/Path.h"
@@ -58,7 +59,7 @@ bool removeIfExists(StringRef Path) {
   // This is an approximation, on error we don't know in general if the file
   // existed or not.
   std::error_code EC = sys::fs::remove(Path, false);
-  return EC != std::errc::no_such_file_or_directory;
+  return EC != llvm::errc::no_such_file_or_directory;
 }
 
 char * current_dir() {