Convert FileSystem::Open() to return Expected<FileUP>

Summary:
This patch converts FileSystem::Open from this prototype:

Status
Open(File &File, const FileSpec &file_spec, ...);

to this one:

llvm::Expected<std::unique_ptr<File>>
Open(const FileSpec &file_spec, ...);

This is beneficial on its own, as llvm::Expected is a more modern
and recommended error type than Status.  It is also a necessary step
towards https://reviews.llvm.org/D67891, and further developments
for lldb_private::File.

Reviewers: JDevlieghere, jasonmolenda, labath

Reviewed By: labath

Subscribers: mgorny, lldb-commits

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D67996

llvm-svn: 373003

1 files changed, 7 insertions, 7 deletions

diff --git a/lldb/source/Interpreter/CommandInterpreter.cpp b/lldb/source/Interpreter/CommandInterpreter.cpp
index a5b2d24aeba..6c97391a68b 100644
--- a/lldb/source/Interpreter/CommandInterpreter.cpp
+++ b/lldb/source/Interpreter/CommandInterpreter.cpp
@@ -70,6 +70,7 @@
 
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/SmallString.h"
+#include "llvm/Support/FormatAdapters.h"
 #include "llvm/Support/Path.h"
 #include "llvm/Support/PrettyStackTrace.h"
 
@@ -2337,18 +2338,17 @@ void CommandInterpreter::HandleCommandsFromFile(
     return;
   }
 
-  StreamFileSP input_file_sp(new StreamFile());
   std::string cmd_file_path = cmd_file.GetPath();
-  Status error = FileSystem::Instance().Open(input_file_sp->GetFile(), cmd_file,
-                                             File::eOpenOptionRead);
 
-  if (error.Fail()) {
-    result.AppendErrorWithFormat(
-        "error: an error occurred read file '%s': %s\n", cmd_file_path.c_str(),
-        error.AsCString());
+  auto file = FileSystem::Instance().Open(cmd_file, File::eOpenOptionRead);
+  if (!file) {
+    result.AppendErrorWithFormatv(
+        "error: an error occurred read file '{0}': {1}\n", cmd_file_path,
+        llvm::fmt_consume(file.takeError()));
     result.SetStatus(eReturnStatusFailed);
     return;
   }
+  auto input_file_sp = std::make_shared<StreamFile>(std::move(file.get()));
 
   Debugger &debugger = GetDebugger();