Allow to ommit the catch part in the try command

README.asciidoc

@@ -654,7 +654,7 @@ Some helper commands can be used to define composite commands:
      specify where the info box should be anchored relative to the main selection.
  * +try <commands> catch <on_error_commands>+: prevent an error in <commands>
      from aborting the whole commands execution, execute <on_error_commands>
-     instead.
+     instead. If nothing is to be done on error, the catch part can be ommitted.
  * +reg <name> <content>+: set register <name> to <content>
 
 Note that these commands are available in interactive command mode, but are

src/commands.cc

@@ -657,10 +657,12 @@ void info(CommandParameters params, Context& context)
 
 void try_catch(CommandParameters params, Context& context)
 {
-    if (params.size() != 3)
+    if (params.size() != 1 and params.size() != 3)
         throw wrong_argument_count();
-    if (params[1] != "catch")
+
-        throw runtime_error("try needs a catch");
+    const bool do_catch = params.size() == 3;
+    if (do_catch and params[1] != "catch")
+        throw runtime_error("usage: try <commands> [catch <on error commands>]");
 
     CommandManager& command_manager = CommandManager::instance();
     try
@@ -669,6 +671,7 @@ void try_catch(CommandParameters params, Context& context)
     }
     catch (Kakoune::runtime_error& e)
     {
+        if (do_catch)
             command_manager.execute(params[2], context);
     }
 }

src/rc/cpp.kak

@@ -18,11 +18,11 @@ hook global WinSetOption filetype=cpp %~
     addhl -group cpp-highlight regex "^\h*?#.*?(?<!\\)$" 0:macro
     addhl -group cpp-highlight regex "(?<!')\".*?(?<!\\)(\\\\)*\"" 0:string
     addhl -group cpp-highlight regex "(//[^\n]*\n)|(/\*.*?(\*/|\'))" 0:comment
-    hook window InsertEnd .* -id cpp-hooks %{ try %{ exec -draft <a-x>s\h+$<ret>d } catch %{} }
+    hook window InsertEnd .* -id cpp-hooks %{ try %{ exec -draft <a-x>s\h+$<ret>d } }
-    hook window InsertKey \n -id cpp-hooks %[ try %{ exec -draft k<a-x>s^\h+<ret>yj<a-h>P } catch %{} ] # preserve previous line indent
+    hook window InsertKey \n -id cpp-hooks %[ try %{ exec -draft k<a-x>s^\h+<ret>yj<a-h>P } ] # preserve previous line indent
-    hook window InsertKey \n -id cpp-hooks %[ try %[ exec -draft k<a-x><a-k>[{(]\h*$<ret>j<a-gt> ] catch %{} ] # indent after lines ending with { or (
+    hook window InsertKey \n -id cpp-hooks %[ try %[ exec -draft k<a-x><a-k>[{(]\h*$<ret>j<a-gt> ] ] # indent after lines ending with { or (
-    hook window InsertKey \} -id cpp-hooks %[ try %[ exec -draft <a-h><a-k>^\h+\}$<ret>< ] catch %{} ] # deindent on insert } alone on a line
+    hook window InsertKey \} -id cpp-hooks %[ try %[ exec -draft <a-h><a-k>^\h+\}$<ret>< ] ] # deindent on insert } alone on a line
-    hook window InsertKey \n -id cpp-hooks %[ try %{ exec -draft k<a-x>s\h+$<ret>d } catch %{} ] # cleanup trailing white space son previous line
+    hook window InsertKey \n -id cpp-hooks %[ try %{ exec -draft k<a-x>s\h+$<ret>d } ] # cleanup trailing white space son previous line
 ~
 
 hook global WinSetOption filetype=(?!cpp).* %{

src/rc/git-tools.kak

@@ -39,7 +39,7 @@ def -shell-params git %{ %sh{
     run_git_blame() {
         (
             echo "eval -client '$kak_client' %{
-                      try %{ addhl flag_lines magenta git_blame_flags } catch %{}
+                      try %{ addhl flag_lines magenta git_blame_flags }
                       set buffer=$kak_bufname git_blame_flags ''
                   }" | socat -u stdin UNIX-CONNECT:/tmp/kak-${kak_session}
             declare -A authors
@@ -92,7 +92,7 @@ def -shell-params git %{ %sh{
        show|log|diff) show_git_cmd_output "$@" ;;
        blame) run_git_blame ;;
        show-diff)
-           echo "try %{ addhl flag_lines black git_diff_flags } catch %{}"
+           echo "try %{ addhl flag_lines black git_diff_flags }"
            update_diff
            ;;
        update-diff) update_diff ;;