[Lldb-commits] [PATCH] D129707: [lldb] Print the enum values and their description in the argument value help output

[Jonas Devlieghere via Phabricator via lldb-commits]

JDevlieghere updated this revision to Diff 444511.
JDevlieghere added a comment.

Rebase on D129703 <https://reviews.llvm.org/D129703>


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D129707/new/

https://reviews.llvm.org/D129707

Files:
  lldb/source/Interpreter/CommandObject.cpp
  lldb/test/API/commands/help/TestHelp.py


Index: lldb/test/API/commands/help/TestHelp.py
===================================================================
--- lldb/test/API/commands/help/TestHelp.py
+++ lldb/test/API/commands/help/TestHelp.py
@@ -318,3 +318,16 @@
                     "\(does not apply to binary output\)."])
         self.expect("help memory find", patterns=[
                     "--show-tags\n\s+Include memory tags in output."])
+
+    @no_debug_info_test
+    def test_help_show_enum_values(self):
+        """ Check the help output for a argument type contains the enum values
+        and their descriptions. """
+        self.expect("help <log-handler>", substrs=[
+            'The log handle that will be used to write out log messages.',
+            'default'  , 'Use the default (stream) log handler',
+            'stream'   , 'Write log messages to the debugger output stream',
+            'circular' , 'Write log messages to a fixed size circular buffer',
+            'os'       , 'Write log messages to the operating system log',
+        ])
+
Index: lldb/source/Interpreter/CommandObject.cpp
===================================================================
--- lldb/source/Interpreter/CommandObject.cpp
+++ lldb/source/Interpreter/CommandObject.cpp
@@ -16,6 +16,7 @@
 #include <cstdlib>
 
 #include "lldb/Core/Address.h"
+#include "lldb/Interpreter/CommandOptionArgumentTable.h"
 #include "lldb/Interpreter/Options.h"
 #include "lldb/Utility/ArchSpec.h"
 #include "llvm/ADT/ScopeExit.h"
@@ -398,9 +399,28 @@
       interpreter.OutputHelpText(str, name_str.GetString(), "--", help_text,
                                  name_str.GetSize());
     }
-  } else
+  } else {
     interpreter.OutputFormattedHelpText(str, name_str.GetString(), "--",
                                         entry->help_text, name_str.GetSize());
+
+    // Print enum values and their description if any.
+    OptionEnumValues enum_values = g_argument_table[arg_type].enum_values;
+    if (!enum_values.empty()) {
+      str.EOL();
+      size_t longest = 0;
+      for (const OptionEnumValueElement &element : enum_values)
+        longest =
+            std::max(longest, llvm::StringRef(element.string_value).size());
+      str.IndentMore(5);
+      for (const OptionEnumValueElement &element : enum_values) {
+        str.Indent();
+        interpreter.OutputHelpText(str, element.string_value, ":",
+                                   element.usage, longest);
+      }
+      str.IndentLess(5);
+      str.EOL();
+    }
+  }
 }
 
 const char *CommandObject::GetArgumentName(CommandArgumentType arg_type) {


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