Re: Suggestion for 5.3: import() for creating a "slew" of locals
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- Subject: Re: Suggestion for 5.3: import() for creating a "slew" of locals
- From: Luiz Henrique de Figueiredo <lhf@...>
- Date: 2013年11月17日 22:28:26 -0200
> import(io, 'read', 'write', 'setvbuf')
If you can assume that such statements happen only within say the first
10 lines of the file you could write a reader function that scans these
lines and does a simple gsub. You can even drop the quotes. Something
like this:
local function import(s)
local o=""
local t=nil
for w in s:gmatch("%w+") do
if t==nil then
t=w
else
o=o.."local "..w.."="..t.."."..w.."\t"
end
end
return o
end
T=[[
require"math"
import(io, 'read', 'write', 'setvbuf')
import(math, sin, cos)
print(sin(1))
]]
T=T:gsub("import%s*%((.-)%)", import)
io.write(T) -- actually return T
A syntax like "from name import name1,name,name3" would be even simpler
to parse and arguably more clear.