Re: Declared UpValues, change to Parser.
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- Subject: Re: Declared UpValues, change to Parser.
- From: Luiz Henrique de Figueiredo <lhf@...>
- Date: Wed, 4 May 2016 08:00:30 -0300
> And it seems a perfect job for ltokenp which I've just announced!
The token filter is attached. It transforms
function f()
end
function g() <>
end
function h() <a>
end
function j() <a,b>
end
to
function f ( )
local _=_ENV end
function g ( ) local _= _ENV
end
function h ( ) local _= a
end
function j ( ) local _= a , b
end
--lhf
-- token filter: allow declaration of upvalues
local function emit(...)
io.write(...)
io.write(" ")
end
local state=0
local lastline=1
function FILTER(line,token,text,value)
local t=text
if t=="<file>" or t=="<eof>" then return end
while lastline~=line do lastline=lastline+1 emit("\n") end
if t=="<string>" then value=string.format("%q",value) end
if state==0 then
emit(value)
if t=="function" then
state=1
end
elseif state==1 then
emit(value)
if t==")" then
state=2
end
elseif state==2 then
if t=="<" then
emit("local _=")
state=3
else
emit("local _=_ENV")
emit(value)
state=0
end
elseif state==3 then
if t==">" then
emit("_ENV")
state=0
else
state=4
emit(value)
end
elseif state==4 then
if t==">" then
state=0
else
emit(value)
end
end
end