From 1d8998de22fe419f12dacff28154d1c3d598b84b Mon Sep 17 00:00:00 2001
From: Timur Kelman <tymur.gubayev@gmail.com>
Date: Sun, 23 Feb 2020 16:57:57 +0100
Subject: [PATCH] allow custom filter in `dfhack.printall_recurse`

Objects with links like `job` output way too much. With this change, it's possible to provide an optional filter and exclude the `list_link`.
```
[lua]# j = dfhack.gui.getSelectedJob()
[lua]# printall_recurse(j, {[tostring(j.list_link)]=true, [tostring(j.pos)]=true})
```
---
 library/lua/dfhack.lua | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/library/lua/dfhack.lua b/library/lua/dfhack.lua
index 049297385..73fd651e2 100644
--- a/library/lua/dfhack.lua
+++ b/library/lua/dfhack.lua
@@ -285,8 +285,8 @@ do_print_recurse = function(printfn, value, seen, indent)
     return recurse_type_map[t](printfn, value, seen, indent)
 end
 
-function printall_recurse(value)
-    local seen = {}
+function printall_recurse(value, seen)
+    local seen = seen or {}
     do_print_recurse(dfhack.println, value, seen, 0)
 end