local d=ipairs
local y=tonumber
local k=tostring
local h=table.concat
local e=string
local x=e.find
local l=e.format
local c=setmetatable
local b=loadstring
local o=table.remove
local e={}e.__index=e
function e:read()local e,n=self._idx,self._len
if e<n then
e=e+1
self._idx=e
return self._get(e)else
return self._default
end
end
function e:peek()local e,n=self._idx,self._len
if e<n then
e=e+1
return self._get(e)else
return self._default
end
end
function e:pos()return self._idx
end
function e:atend()return self._idx>=self._len
end
local function n(n,l,t)local n={_idx=0;_len=#n;_default=t;_get=function(e)return l(n,e)end;}return c(n,e)end
local function r(n,e)return n:sub(e,e)end
local function t(e,n)if e:peek()==n then
e:read()return true
else
return false
end
end
local function p(e)local e=n(e,r,'')e.expect=t
return e
end
local function t(e,n)return e[n]end
local function f(e)return n(e,t)end
local function s(e,t,n)return{type='expr',token=l('(%s %s %s)',t.token,e.luatext,n.token)}end
local function v(t,n,e)return{type='expr',token=l('math.floor(%s / %s)',n.token,e.token)}end
local function r(e,t,n)return{type='expr',token=l('((%s %s %s) and 1 or 0)',t.token,e.luatext,n.token)}end
local function i(t,e,n)return{type='expr',token=l('(((%s~=0) %s (%s~=0)) and 1 or 0)',e.token,t.luatext,n.token)}end
local function g(t,n,e)return{type='select',token=l("%s or %s",n.token,e.token)}end
local function _(t,n,e)if e.type~='select'then
return nil,"syntax error, ? missing :"end
return{type='expr',token=l("((%s~=0) and %s)",n.token,e.token)}end
local function u(n,e)return{type='expr',token=l('(((%s)==0) and 1 or 0)',e.token)}end
local function m(n)local o={}local a
local function t(e,a,i,l,r,t)o[#o+1]={type=a,token=e,priority=i,method=l,luatext=r or e,assoc=t or'left'}end
n=p(n)while not n:atend()do
local e=n:read()while e and e:match('%s')do
e=n:read()end
if e==''then break end
a=n:pos()if e:match('%d')then
local e={e}while n:peek():match('%d')do
e[#e+1]=n:read()end
t(h(e,''),'number')elseif e=='='then
if n:peek()=='='then
n:read()t('==','binop',5,r)else
return nil,l('syntax error (pos=%d), lone =',a)end
elseif e=='!'then
if n:expect('=')then
t('!=','binop',5,r,'~=')else
t('!','unop',1,u,nil,'right')end
elseif e=='&'then
if n:expect('&')then
t('&&','binop',6,i,'and')else
return nil,l('syntax error (pos=%d), lone &',n:pos())end
elseif e=='|'then
if n:expect('|')then
t('||','binop',7,i,'or')else
return nil,l('sysntax error (pos=%d), lone |',n:pos())end
elseif e=='<'then
if n:expect('=')then
t('<=','binop',4,r)else
t('<','binop',4,r)end
elseif e=='>'then
if n:expect('=')then
t('>=','binop',4,r)else
t('>','binop',4,r)end
elseif e=='n'then
t(e,'var')elseif(e=='*')or(e=='%')then
t(e,'binop',2,s)elseif e=='/'then
t(e,'binop',2,v)elseif(e=='+')or(e=='-')then
t(e,'binop',3,s)elseif e=='?'then
t(e,'binop',8,_,nil,'right')elseif e==':'then
t(e,'binop',8,g,nil,'right')elseif x('()',e,1,true)then
t(e,e)else
return nil,l('syntax error (pos %d), unexpected %s',n:pos(),e)end
end
return o
end
local function s(e)while true do
local t=100
local n=0
local l='none'for o,e in d(e)do
if(e.type=='binop')or(e.type=='unop')then
if e.priority<t then
n=o
t=e.priority
l=e.assoc
elseif(l=='right')and(e.priority==t)then
n=o
end
end
end
if n==0 then
break
end
local t=e[n]if t.type=='unop'then
local l=e[n+1]local t,l=t.method(t,l)if not t then
return nil,l
end
e[n]=t
o(e,n+1)else
local l=e[n-1]local r=e[n+1]local t,l=t.method(t,l,r)if not t then
return nil,l
end
e[n]=t
o(e,n+1)o(e,n-1)end
end
while#e>1 do
local n=0
for t,e in d(e)do
if e.type=='tcond'then
n=t
end
end
if n>1 then
local a=e[n-1]local r=e[n+1]local i=e[n+2]local t=e[n+3]if not(a and r and i and t)then
return nil,"syntax error on ?"end
if i.type~='tselect'then
return nil,"syntax error, missing :"end
e[n]={type='expr',token=l("((%s~=0) and %s or %s)",a.token,r.token,t.token)}o(e,n+3)o(e,n+2)o(e,n+1)o(e,n-1)else
return nil,"syntax error, does not reduce"end
end
return e[1]end
local function o(t)local n={}while true do
local e=t:peek()if e.type=='unop'then
t:read()n[#n+1]=e
e=t:peek()end
if e.type=='var'then
n[#n+1]=e
elseif e.type=='number'then
n[#n+1]=e
elseif e.type=='('then
t:read()local o=o(t)e=t:peek()if e.type~=')'then
return nil,l('syntax error: ) expected, got %s',k(e.type))end
n[#n+1]={type='expr',token=l('(%s)',o.token)}else
return nil,"syntax error"end
t:read()e=t:peek()if e and e.type=='binop'then
t:read()if e.token=='?'then
e.type='tcond'elseif e.token==':'then
e.type='tselect'end
n[#n+1]=e
else
break
end
end
return s(n)end
local function i(e)local e,n=o(f(e))if e then
return e.token
else
return nil,n
end
end
local function o(n)local e={}for t,n in n:gmatch('%s*(%a+)%s*=%s*([^;]*);')do
e[t]=n
end
return e
end
local t={}t.__index=t
t.__call=function(n,e)e=n.plural(e)if(e<0)then
e=0
elseif e>=n.nplurals then
e=n.nplurals-1
end
return e
end
local function r(e)local l={}local n=o(e)local e=n.nplurals
if not e then
return nil,'invalid expression, nplurals missing'end
local e=y(e)if not e then
return nil,'invalid expression, nplurals not a number'end
if math.floor(e)~=e then
return nil,'invalid expression, nplurals not an int'end
l.nplurals=e
local e=n.plural
if not e then
return nil,'invalid expression, plural missing'end
local o,n=m(e)if not o then
return nil,n
end
e,n=i(o)if not e then
return nil,n
end
e,n=b('n=...;return '..e)if not e then
return nil,n
end
l.plural=e
c(l,t)return l
end
local e={compile=r}return e