CommandManager: rework command parser

a new type of strings is supported inspired by the ruby strings.
%<delimiter>content<delimiter>, if opening delimiter is one of
([{<, then closing delimiter is the matching )]}> and balanced
delimiters in the string needs not to be escaped, else the closing
delimiter is the same as the opening one.

shell expansion is available through %sh<delimiter>command<delimiter>
syntax.

Command flags have been removed, as these strings provide proper nesting
support, so now, you can for example do:

def command %{ echo %sh{ ls } }

1 files changed, 0 insertions, 10 deletions

diff --git a/src/command_manager.hh b/src/command_manager.hh
index 134dbd48..a0609c5e 100644
--- a/src/command_manager.hh
+++ b/src/command_manager.hh
@@ -72,13 +72,6 @@ private:
 class CommandManager : public Singleton<CommandManager>
 {
 public:
-    enum Flags
-    {
-        None = 0,
-        IgnoreSemiColons = 1,
-        DeferredShellEval = 2,
-    };
-
     void execute(const String& command_line, const Context& context,
                  const EnvVarMap& env_vars = EnvVarMap());
     void execute(const CommandParameters& params, const Context& context,
@@ -90,19 +83,16 @@ public:
 
     void register_command(const String& command_name,
                           Command command,
-                          unsigned flags = None,
                           const CommandCompleter& completer = CommandCompleter());
 
     void register_commands(const memoryview<String>& command_names,
                            Command command,
-                           unsigned flags = None,
                            const CommandCompleter& completer = CommandCompleter());
 
 private:
     struct CommandDescriptor
     {
         Command command;
-        unsigned flags;
         CommandCompleter completer;
     };
     std::unordered_map<String, CommandDescriptor> m_commands;