Display the command prompt in error face when the command is not found

Fixes #1021

1 files changed, 4 insertions, 3 deletions

diff --git a/src/command_manager.hh b/src/command_manager.hh
index 4a326613..55d62921 100644
--- a/src/command_manager.hh
+++ b/src/command_manager.hh
@@ -8,6 +8,7 @@
 #include "shell_manager.hh"
 #include "parameters_parser.hh"
 #include "string.hh"
+#include "optional.hh"
 #include "utils.hh"
 #include "unordered_map.hh"
 
@@ -38,7 +39,7 @@ enum class CommandFlags
 
 template<> struct WithBitOps<CommandFlags> : std::true_type {};
 
-using CommandInfo = std::pair<String, String>;
+struct CommandInfo { String name, info; };
 
 struct Token
 {
@@ -91,8 +92,8 @@ public:
                          CommandParameters params,
                          size_t token_to_complete, ByteCount pos_in_token);
 
-    CommandInfo command_info(const Context& context,
-                             StringView command_line) const;
+    Optional<CommandInfo> command_info(const Context& context,
+                                       StringView command_line) const;
 
     bool command_defined(const String& command_name) const;