[lldb] Part 2 of 2 - Refactor `CommandObject::DoExecute(...)` return `void` (not `bool`) (#69991)

[lldb] Part 2 of 2 - Refactor `CommandObject::DoExecute(...)` to return
`void` instead of ~~`bool`~~

Justifications:
- The code doesn't ultimately apply the `true`/`false` return values.
- The methods already pass around a `CommandReturnObject`, typically
with a `result` parameter.
- Each command return object already contains:
	- A more precise status
	- The error code(s) that apply to that status

Part 1 refactors the `CommandObject::Execute(...)` method.
- See
[https://github.com/llvm/llvm-project/pull/69989](https://github.com/llvm/llvm-project/pull/69989)

rdar://117378957

1 files changed, 5 insertions, 9 deletions

diff --git a/lldb/source/Commands/CommandObjectRegister.cpp b/lldb/source/Commands/CommandObjectRegister.cpp
index 6e6071f..a4d53e5 100644
--- a/lldb/source/Commands/CommandObjectRegister.cpp
+++ b/lldb/source/Commands/CommandObjectRegister.cpp
@@ -161,7 +161,7 @@ public:
   }
 
 protected:
-  bool DoExecute(Args &command, CommandReturnObject &result) override {
+  void DoExecute(Args &command, CommandReturnObject &result) override {
     Stream &strm = result.GetOutputStream();
     RegisterContext *reg_ctx = m_exe_ctx.GetRegisterContext();
 
@@ -234,7 +234,6 @@ protected:
         }
       }
     }
-    return result.Succeeded();
   }
 
   class CommandOptions : public OptionGroup {
@@ -348,7 +347,7 @@ public:
   }
 
 protected:
-  bool DoExecute(Args &command, CommandReturnObject &result) override {
+  void DoExecute(Args &command, CommandReturnObject &result) override {
     DataExtractor reg_data;
     RegisterContext *reg_ctx = m_exe_ctx.GetRegisterContext();
 
@@ -378,7 +377,7 @@ protected:
             // has been written.
             m_exe_ctx.GetThreadRef().Flush();
             result.SetStatus(eReturnStatusSuccessFinishNoResult);
-            return true;
+            return;
           }
         }
         if (error.AsCString()) {
@@ -396,7 +395,6 @@ protected:
                                      reg_name.str().c_str());
       }
     }
-    return result.Succeeded();
   }
 };
 
@@ -447,10 +445,10 @@ different for the same register when connected to different debug servers.)");
   }
 
 protected:
-  bool DoExecute(Args &command, CommandReturnObject &result) override {
+  void DoExecute(Args &command, CommandReturnObject &result) override {
     if (command.GetArgumentCount() != 1) {
       result.AppendError("register info takes exactly 1 argument: <reg-name>");
-      return result.Succeeded();
+      return;
     }
 
     llvm::StringRef reg_name = command[0].ref();
@@ -464,8 +462,6 @@ protected:
     } else
       result.AppendErrorWithFormat("No register found with name '%s'.\n",
                                    reg_name.str().c_str());
-
-    return result.Succeeded();
   }
 };