Re: DSL in lua
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- Subject: Re: DSL in lua
- From: Luiz Henrique de Figueiredo <lhf@...>
- Date: Fri, 7 Dec 2012 10:37:41 -0200
> What is the best way to create custom DSL in Lua? Google says, that it
> can be possible via base lua or using lpeg.
>
> I need something like this
> direcotry "/etc/" {
> owner "root"
> group "wheel"
> mode "0755"
> action "create"
> }
>
> Can somebody provie minimal lua code for this sample?
I'm late in this thread but here is a simple parser in pure Lua.
There is no error handling, sorry.
DATA=[[
direcotry "/etc/" {
owner "root"
group "wheel"
mode "0755"
action "create"
}
direcotry "/home/lua/" {
group "wheel"
action "remove"
mode "0755"
owner "lua"
}
]]
local config={}
for verb,name,body in DATA:gmatch('(%w+)%s+"(.-)"%s+(%b{})') do
if config[verb]==nil then config[verb]={} end
local t={}
for k,v in body:gmatch('(%w+)%s+"(.-)"') do
t[k]=v
end
config[verb][name]=t
end
-- see what has been built
for K,V in pairs(config) do
print(K,V)
for k,v in pairs(V) do
print(k,v)
for k,v in pairs(v) do
print(k,v)
end
end
end