1 files changed, 16 insertions, 5 deletions
diff --git a/abseil-cpp/absl/flags/internal/parse.h b/abseil-cpp/absl/flags/internal/parse.h
index de706c8..10c531b 100644
--- a/abseil-cpp/absl/flags/internal/parse.h
+++ b/abseil-cpp/absl/flags/internal/parse.h
@@ -16,11 +16,14 @@
 #ifndef ABSL_FLAGS_INTERNAL_PARSE_H_
 #define ABSL_FLAGS_INTERNAL_PARSE_H_
 
+#include <iostream>
+#include <ostream>
 #include <string>
 #include <vector>
 
 #include "absl/base/config.h"
 #include "absl/flags/declare.h"
+#include "absl/flags/internal/usage.h"
 #include "absl/strings/string_view.h"
 
 ABSL_DECLARE_FLAG(std::vector<std::string>, flagfile);
@@ -32,7 +35,6 @@ namespace absl {
 ABSL_NAMESPACE_BEGIN
 namespace flags_internal {
 
-enum class ArgvListAction { kRemoveParsedArgs, kKeepParsedArgs };
 enum class UsageFlagsAction { kHandleUsage, kIgnoreUsage };
 enum class OnUndefinedFlag {
   kIgnoreUndefined,
@@ -40,10 +42,15 @@ enum class OnUndefinedFlag {
   kAbortIfUndefined
 };
 
-std::vector<char*> ParseCommandLineImpl(int argc, char* argv[],
-                                        ArgvListAction arg_list_act,
-                                        UsageFlagsAction usage_flag_act,
-                                        OnUndefinedFlag on_undef_flag);
+// This is not a public interface. This interface exists to expose the ability
+// to change help output stream in case of parsing errors. This is used by
+// internal unit tests to validate expected outputs.
+// When this was written, `EXPECT_EXIT` only supported matchers on stderr,
+// but not on stdout.
+std::vector<char*> ParseCommandLineImpl(
+    int argc, char* argv[], UsageFlagsAction usage_flag_action,
+    OnUndefinedFlag undef_flag_action,
+    std::ostream& error_help_output = std::cout);
 
 // --------------------------------------------------------------------
 // Inspect original command line
@@ -52,6 +59,10 @@ std::vector<char*> ParseCommandLineImpl(int argc, char* argv[],
 // command line or specified in flag file present on the original command line.
 bool WasPresentOnCommandLine(absl::string_view flag_name);
 
+// Return existing flags similar to the parameter, in order to help in case of
+// misspellings.
+std::vector<std::string> GetMisspellingHints(absl::string_view flag);
+
 }  // namespace flags_internal
 ABSL_NAMESPACE_END
 }  // namespace absl