最速の言語Lua ~Python Hack-a-thon #3~

Name:
Isoparametric
Blog:

http://d.hatena.ne.jp/Isoparametric/

2010 1 23

Lua
Lua TeCGraf

Lua
C
Lua VM
MIT License
Lua Lua

Pascal

Lua
Python Ruby Lua
Lua

Lua5.0 GC Lua5.1
GC Python
Ruby GC GC Lua

Lua C++ tolua++ Luabind
MIT License
2010 1 23

Lua
Lua TeCGraf

Lua
C
Lua VM

W
MIT License
Lua
iki Lua
pe
dia
Pascal

Lua
Python Ruby Lua
Lua

Lua5.0 GC Lua5.1
GC Python
Ruby GC GC Lua

Lua C++ tolua++ Luabind
MIT License
2010 1 23

1993
Tecgraf

Tecgraf

Lua

C -> Lua -> C

2010 1 23

Python LL
C
C
LL

ANCI C
C
GC
JavaScript prototype Lua
2010 1 23

Lua

Lua

Lua

Lua

Lua

Lua

Lua MIT license
2010 1 23

Lua

http://www.schulze-mueller.de/download/lua-poster-090207.pdf

2010 1 23

Web

Adobe's Photoshop Lightroom
Ginga middleware
World of Warcraft

2010 1 23

Perl Ruby

Python
Lua

Python

Maya Inkscape
Python Lua

2010 1 23

Py(ry

Py(ry 2.6: and as assert break class continue
def del elif else except exec ﬁnally for from
global if import in is lambda not or pass print
raise return try while with yield

Lua 5.1: and break do else elseif end false
for function if in local nil not or repeat
return then true until while

31 vs 21

2010 1 23

Lua

VM
VM

GC

2010 1 23

JavaVM .NET VM
VM

Perl6

Lua
VM

2010 1 23

Lua

Lua

Lua C

2010 1 23

……
print(“Hello World”)
% lua hello.lua

2010 1 23

--
function fact (n)
if n == 0 then
return 1
else
return n * fact(n-1)
end
end

print("enter a number:")
a = io.read("*number")
print(fact(a))
2010 1 23

--
--[[

]]

2010 1 23

-- --[[
print("Hello!!")
--[[
--]]
↓
]]
----[[
print("Hello!!")
--]]

2010 1 23

-- --[[
print("Hello!!")
--[[
--]]
↓
]]
----[[
print("Hello!!")
--]]
--[=[
...
]=]
[[ ]] =
[[ ]]
2010 1 23

nil
number
boolean
string
table
function
userdata
thread
2010 1 23

nil

nil nil

==nil
GC

nil

2010 1 23

nil false
0 true
2010 1 23

Patch ……
ﬂoat long
2010 1 23

“ ” ‘ ’ --
Lua

0

immutable
2010 1 23

..

a = "1" + "1" 2
b = "a" + "b"
b = “a” .. “b”

2010 1 23

Lua
key value
“x” 9.2
nil

Header value
100
200
1 300
nil

2010 1 23

local do~end
Lua

local

do -- do~end
local a = 1
print(a) --
end
print(a) --
2010 1 23

+ - * /
^ % -

< > <= >= == ~=

and or not
2010 1 23

if while repeat for

2010 1 23

if op == “+” then
r=a+b
if
elseif op == “-” then
r=a-b
elseif op == “*” then
r=a*b
elseif op == “/” then
r=a/b
else
error(“invalid operation”)
end

2010 1 23

while
local i = 1
while t[i] do
print(t[i])
i=i+1
end

2010 1 23

repeat
--
repeat
line = io.read()
untile line ~= “”
print(line)
-- local

local sqr = x/2
repeat
sqr = (sqr + x/sqr)/2
local err = math.abs(sqr^2 - x)
untile err < x/10000 -- err
2010 1 23

-- for
for i=10,1,-1 do -- for
print(i)
end

-- for
for i,v in ipairs(array) do
print(v)
end
-- for
ipairs
2010 1 23

break return

switch

continue

break return

continue Patch

5.2

2010 1 23

(co-routine)

2010 1 23

…… CAPI

coroutine.create
coroutine.resume
coroutine.running
coroutine.status
coroutine.wrap
coroutine.yield
Lua

2010 1 23

coroutine.status

suspended

running

dead

normal

2010 1 23

co = coroutine.create(
function ()
print("start")
coroutine.yield() --
print("resume")
end
)
-- co type thread
coroutine.resume(co) --

--> start
--> resume

2010 1 23

function ()
print("start")
function ()
local c = coroutine.create(
print("start")
function ()
coroutine.yield() --
print("nest coroutine start")
print("resume") coroutine.yield()
end print("nest coroutine resume")
) end
-- co type thread )
coroutine.resume(co) -- coroutine.resume(c)
coroutine.resume(c)
coroutine.yield()
print("resume")
end
--> start )
--> resume coroutine.resume(co) --

2010 1 23

croutine.create

croutine.resume

croutine.yield

2010 1 23

1
1 1

……

2010 1 23

Lua

C Lua
2010 1 23

C Lua

C Lua
2010 1 23

Lua C

C Lua
2010 1 23

Lua

20

C
2010 1 23

malloc/free/realloc

2010 1 23

KByte

C
→

LTR (Lua Tiny RAM) Patch

2010 1 23

tolua++ luabind

tolua++ Lua

C++

2010 1 23

printf

Windows

2010 1 23

C Lua
C Lua

t = lua_newthread(L);

GC

Lua
GC

2010 1 23

GC
GC
GC

GC

2010 1 23

__add, __sub, __mul, __div, __unm
,__mod ,__pow

__eq ,__lt ,__le

tostring __tostring

__index

__newindex

2010 1 23

mt = {}
mt.__add = function (lhs, rhs)
print(lhs, rhs, "mt._add")
return lhs
end
hoge = {}
foo = {}
setmetatable(hoge, mt) --
hoge = hoge + foo --
2010 1 23

Lua

__mode ”k”
”v”

2010 1 23

weak = {}
mt = {__mode="k"} --
setmetatable(weak,mt) --
key = {} --
weak[key] = 1
key = {} --
weak[key] = 2
--
collectgarbage() --
for k, v in pairs(weak) do print(v) end
--> 2

2010 1 23

_G

a = “b” _G[“a”] = “b”

a[“b”] a.b

_G

2010 1 23

t:hoge() t.hoge(t)

2010 1 23

Hoge = {value = 0}
function Hoge:new(c) h:setValue(100)
c = c or {}
setmetatable(c, self)
self.__index = self
h.setValue(h,100)
return c
end

function Hoge:setValue(v)
self.value = v
end

h = Hoge:new()

print(h.value)
h:setValue(100) h
print(h.value)
Hoge
--> 0
--> 100

2010 1 23

Lua
Lua 5.1.4 (2008-8-22)

Lua 5.2 (work2) (2010-1-13)

5.2

Lua!

Patch ……

2010 1 23

最速の言語Lua ~Python Hack-a-thon #3~

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最速の言語Lua ~Python Hack-a-thon #3~