Re: table.new in 5.3?
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- Subject: Re: table.new in 5.3?
- From: "Liam Devine" <liamdevine@...>
- Date: 2013年11月21日 21:32:56 -0000
On 20/11/13 17:37, Rena wrote:
I wonder if there's a good reason for Lua 5.3 or a third-party library
to add table.new(narr, nrec) (as seen in LuaJIT) to Lua? It seems like a
useful optimization, and its implementation should only take a couple of
lines (call lua_createtable() and return).
--
Sent from my Game Boy.
When I want it and whilst using vanilla Lua then I use the following
which I feel is horrible. It would be nice to finally have it in the
core but I would not hold my breath.
dmail@dmail00:~$ cat table_new.lua
local t ={nil,nil,nil,nil,nil,nil,[1]=nil,[1]=nil,[1]=nil}
dmail@dmail00:~$ luac-5.2.2 -l -l table_new.lua
main <table_new.lua:0,0> (7 instructions at 0x927db60)
0+ params, 7 slots, 1 upvalue, 1 local, 2 constants, 0 functions
1 [1] NEWTABLE 0 6 3
2 [1] LOADNIL 1 5
3 [1] SETTABLE 0 -1 -2 ; 1 nil
4 [1] SETTABLE 0 -1 -2 ; 1 nil
5 [1] SETTABLE 0 -1 -2 ; 1 nil
6 [1] SETLIST 0 6 1 ; 1
7 [1] RETURN 0 1
constants (2) for 0x927db60:
1 1
2 nil
locals (1) for 0x927db60:
0 t 7 8
upvalues (1) for 0x927db60:
0 _ENV 1 0
--
Liam