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view framework/env/slot/use_temporary.lua @ 29:0b7e87f2dc91
add trace.debug_traceback() function
It inserts a traceback into the trace debug log. Usefull on development of unknown code.
It inserts a traceback into the trace debug log. Usefull on development of unknown code.
| author | Daniel Poelzleithner <poelzi@poelzi.org> |
|---|---|
| date | Mon Sep 20 15:29:23 2010 +0200 (2010-09-20) |
| parents | 9fdfb27f8e67 |
| children |
line source
1 --[[--
2 slot_content =
3 slot.use_temporary(
4 function()
5 ...
6 end
7 )
9 This function creates a temporary slot and executes code in a way that slot.put(...) and other functions will write into the temporary slot. Afterwards the contents of the temporary slot are returned as a single string.
11 --]]--
13 function slot.use_temporary(block)
14 local old_slot = slot._active_slot
15 local temp_slot_reference = {} -- just a unique reference
16 slot._active_slot = temp_slot_reference
17 block()
18 slot._active_slot = old_slot
19 local result = slot.get_content(temp_slot_reference)
20 slot.reset(temp_slot_reference)
21 return result
22 end