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NIL.lua
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NIL.lua
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--[[
NIL.lua
Copyright (C) Jeroen P. Broks
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
Version 19.09.07
]]
-- Variables
local macros = {["!="]="~="}
local vars = {}
local functions = {}
local classes = {} -- reserved for when classes are implemented!
local luakeywords = {"if","do","for","while","then","repeat","end","until","elseif","else","return", "break", "in", "not","or","and","nil","true","false","goto","group","infinity", "with",
"final","self","switch","case","default","forever","module","class","get","set","readonly","private", "get", "set","module","new","quickmeta"} -- please note that some keywords may still have some "different" behavior! Although 'switch' is not a Lua keyword it's listed here, as it will make my 'scope' translation easier...
local nilkeywords = {"static","delegate","number","int","void","string","var", "function","global","table","implementation","impl","forward","bool","boolean","link"} -- A few words here are actually Lua keywords, BUT NIL handles them differently in a way, and that's why they are listed here!
local operators = {"==","~".."=",">=","<=","+","-","*","//","%","(",")","{","}","[","]",",","/","=","<",">","..",";","^"} -- Period is not included yet, as it's used for both decimal numbers, tables, and in the future (once that feature is implemented) classes.
local idtypes = {"var",["variant"]="var",["int"]="number","number","string","function",["delegate"]="function","void",["bool"]="boolean","boolean"}
local globusedforuse = {}
local scopecounter = 0
local truestatics = {}
NIL_STATIC_VARS = {}
function NIL_NEW_STATIC(scope,varid,vartype,vardefault)
local tag = string.format("%s_%s",scope,varid)
--print(scope,varid,vartype,vardefault)
truestatics[tag] = truestatics[tag] or { vartype=vartype, value=vardefault }
end
setmetatable(NIL_STATIC_VARS,{
__index = function(t,k)
assert(truestatics[k],"NT: Unknown static: "..tostring(k))
--print(NIL.LuaSerialize("statics",truestatics))
return truestatics[k].value
end,
__newindex = function(t,k,v)
assert(type(k)=='string',"Invalid static key")
local vr = truestatics[k]
local vtpe = type(v)
local stpe = vr.vartype
local allowed
assert(v,"NR: Non existent static alled: "..tostring(k))
if stpe=="delegate" then stpe="function" end
if stpe=="bool" then stpe="boolean" end
if stpe=="var" then
allowed = true
elseif stpe=="number" or stpe=="string" or stpe=="boolean" then
allowed = stpe==vtpe
elseif stpe=="function" or stpe=="table" or stpe=="userdata" then
allowed = stpe==vtpe or v==nil
else
allowed = type(v)=='table' and v[".classname"] == stpe
end
assert(allowed,"NR: Invalid value assigned to static!")
truestatics[k].value=v
end
})
NIL__globalstrictness = {
nochange = {NIL__globalstrictness=true},
types = {},
globals = _G,
onoff=false,
setbefore=false,
}
local used = {}
local mNIL = {}
mNIL.globalstrictness = NIL__globalstrictness
-- locals are faster than gloabls
local loadstring = loadstring or load
local io=io
local assert=assert
local load=load
local string=string
local ipairs=ipairs
local pairs=pairs
local table=table
local type=type
local tonumber=tonumber
local print=print
-- A few functions I need to get NIL to work anyway!
local replace = string.gsub
local ASC=string.byte
local sprintf = string.format
mNIL.SayFuncs = {}
local realerror = error
local realassert = assert
local function NILError(err)
if NILERRORDONE then
NILERRORDONE = false
return
end
NILERRORDONE=true
print(err)
print(debug.traceback)
realerror("FAIL: "..err)
end
mNIL.Error = NILError
error = function(myerror)
(mNIL.Error or NILError)(myerror)
end
function full_assert(condition,errmsg)
assert(condition,errmsg.."\n\n"..debug.traceback())
end
-- Technically the the "real" assert does, but now this routine can take it over if needed, as the "real" assert would always use Lua's internal error features.
assert = function(condition,merror)
if not condition then error(merror) end
return condition
end
local globalstrictmeta = {
__index = function(t,k) return NIL__globalstrictness.globals[k] end,
__newindex = function(t,k,v)
--print("Defining!")
if NIL__globalstrictness.onoff then
if NIL__globalstrictness.nochange[k] then error("NR: Trying to assign a value to a read-only global ("..k..")") return end
if NIL__globalstrictness.types[k] and NIL__globalstrictness.types[k]~="var" and NIL__globalstrictness.types[k]~=type(v) then
if not(type(v)=="table" and v[".classname"] == NIL__globalstrictness.types[k]) then
error("NR: Global variable ("..k..") definition did not get the type expected. Wanted "..NIL__globalstrictness.types[k].."; got "..type(v))
return
end
end
end
NIL__globalstrictness.globals[k] = v
end
}
function mNIL.StrictGlobal(onoff)
--print("Script Global "..tostring(NIL__globalstrictness.onoff).." => "..tostring(onoff)) print("Set before = "..tostring(NIL__globalstrictness.setbefore))
if type(onoff)~="boolean" then error("StrictGlobal only wants a boolean value") end
if onoff==NIL__globalstrictness.onoff then return end -- if nothing changes, let's not spook things up.
if not NIL__globalstrictness.setbefore then
NIL__globalstrictness.globals = {}
for k,v in pairs(_G) do NIL__globalstrictness.globals[k]=v end
print(tostring(globalstrictmeta))
setmetatable(_G,globalstrictmeta)
NIL__globalstrictness.setbefore=true
end
NIL__globalstrictness.onoff=onoff
end
function mNIL.qMod(act,value,modifier)
local tv = type(value)
local tm = type(modifier)
if tv == "number" then
assert(tm=="number",("Action type mismatch %s!=%s"):format(tv,tm))
if act=="+" then
return value + modifier
elseif act=="-" then
return value - modifier
elseif act=="/" then
return value / modifier
elseif act:upper()=="DIV" then
return math.floor((value/modifier)+.5)
elseif act=="%" or act:upper()=="MOD" then
return value % modifier
elseif act=="*" then
return value * modifier
else
error(("Action '%s' not possible with %s"):format(act,tm))
end
elseif tv == "boolean" then
if act=="=" then
return value~=false and value~=nil
elseif act=="!" then
return value==false or value==nil
end
error(("Action '%s' not possible with %s"):format(act,tm))
elseif tv == "userdata" then
error("Userdata not compatible with quick modifiers")
elseif tv == "string" then
if act=="+" then
return value .. tostring(modifier)
elseif act=="*" then
assert(tm=="number","* for strings requires a number for a moderfier and not a"..tm)
local ret = ""
for i=1,modifier do
ret = ret .. tostring(value)
end
return ret
else
error(("Action '%s' not possible with %s"):format(act,tm))
end
elseif tv == "table" then
local wantmethod
if act=="+" then wantmethod="ADD"
elseif act=="-" then wantmethod="SUBTRACT"
elseif act=="/" then wantmethod="DIVIDE"
elseif act=="DIV" then wantmethod="INTDIVIDE"
elseif act=="%" then wantmethod="MODULO"
elseif act=="*" then wantmethod="MULTIPLY"
else error("No reference for action "..act) end
if value[".classname"] then
return value["QUICMODIFY_"..wantmethod](modifier)
else
return value["QUICMODIFY_"..wantmethod](value,modifier)
end
else
error("No quickmodifier for "..tv)
end
end
local function dbg(myvarname,myvar,level)
local ret = ""
for i=1,level or 1 do ret = ret .."\t" end
ret = ret .. sprintf("%s %s: ",type(myvar),myvarname)
-- I really NEED a case routine!
if type(myvar)=="nil" then
ret = ret .. "nil\n"
elseif type(myvar) == "userdata" or type(myvar) == "function" then
ret = ret .. "~\n"
elseif type(myvar) == "string" or type(myvar)=="number" then
ret = ret .. myvar .. "\n"
elseif type(myvar) == "table" then
ret = ret .. "\n"
for k,v in pairs(myvar) do
ret = ret .. dbg(k,v,(level or 1)+1)
end
elseif type(myvar) == "boolean" then
if myvar then ret = ret .. "true\n" else ret = ret .. "false\n" end
else
ret = ret .. "WTF???\n" -- This should never be possible to happen!
end
return ret
end
local function split(inputstr, sep)
if sep == nil then
sep = "%s"
end
local t={} ; local i=1
for str in string.gmatch(inputstr, "([^"..sep.."]+)") do
t[i] = str
i = i + 1
end
return t
end
local function split(inputstr, sep)
if sep == nil then
sep = "%s"
end
local t={} ; local i=1
for str in string.gmatch(inputstr, "([^"..sep.."]+)") do
t[i] = str
i = i + 1
end
return t
end
local substr = string.sub
local function left(s,l)
return substr(s,1,l)
end local Left=left
local function right(s,l)
local ln = l or 1
local st = s or "nostring"
return substr(st,-ln,-1)
end local Right=right
local function mid(s,o,l)
local ln=l or 1
local of=o or 1
local st=s or ""
return substr(st,of,(of+ln)-1)
end local Mid=mid
-- slower, more amateur, but it should fix the whiteline ignore bug!
local function brutesplit(inputstr,sep)
local s = sep or "\n"
local t={}
local i=1
local ti=1
local skip=0
for i=1,#inputstr do
if mid(inputstr,i,#sep)==sep then
ti = ti + 1
skip=#sep-1
elseif skip>0 then
skip = skip - 1
else
t[ti] = t[ti] or ""
t[ti] = t[ti] .. mid(inputstr,i,1)
end
end
-- for i,v in ipairs(t) do print(i,v) end
return t
end
local function trim(s)
return (s:gsub("^%s*(.-)%s*$", "%1"))
end
local function prefixed(str,prefix)
return left(str,#prefix)==prefix
end
local function suffixed(str,suffix)
return right(str,#suffix)==suffix
end
local function itpairs(mytab)
local i = 0
return function()
i = i + 1
if mytab[i] then return i,trim(mytab[i]) end
return nil,nil
end
end
local function tcontains(t,v)
for i,iv in ipairs(t) do
if iv==v then return i end
end
return nil
end
local function spairs(t, order)
-- collect the keys
local keys = {}
local t2 = {}
for k,v in pairs(t) do keys[#keys+1] = k t2[k]=v end
-- if order function given, sort by it by passing the table and keys a, b,
-- otherwise just sort the keys
if order then
table.sort(keys, function(a,b) return order(t, a, b) end)
else
table.sort(keys)
end
-- return the iterator function
local i = 0
return function()
i = i + 1
if keys[i] then
return keys[i], t2[keys[i]]
end
end
end
local function ValidForIdentifier(str)
-- Regular expressions may be faster, but I never mastered that, and this way I can be sure it works!
local ret = true
for i=1,#str do
local c=mid(str:upper(),i,1)
local b=ASC(c)
if (i==1 and b>=48 and b<=57) then return false end -- Identifiers may NOT begin with a number!
ret = ret and (c=="_" or (b>=65 and b<=90) or (b>=48 and b<=57))
end
return ret
end
local function chop(amystring,pure,atrack)
if trim(amystring)=="" then return {} end
local track = atrack or "???"
--[[ primitive method
local i=0
local wstring
local tstring = mystring
repeat
wstring = tstring
tstring = replace(tstring,"\r", " ")
tstring = replace(tstring,"\t", " ")
tstring = replace(tstring," ", " ")
until wstring == tstring
local chopped=split(tstring)
-- ]]
-- --[[ 'pro' method
local chopped = {}
local gword = ""
local instring
local openstring=nil
local wt=""
-- dirty force fix on identifiers not taking well to ) next to them (for reasons beyond me)
-- Due to replace using 'RegEx' I'll have to do this the 'long way'
local mystring=""
do
local o = 0
local s = nil
for i=1,#amystring do
if mid(amystring,i,1)=="\"" or mid(amystring,i,1)=="'" then
if not s then s = mid(amystring,i,1)
elseif mid(amystring,i,1)==s then s=nil end
end
-- print(i,s,amystring,mystring,mid(amystring,i,1))
if s then mystring = mystring .. mid(amystring,i,1) end
if not s then
if o==0 then
for _,op in ipairs(operators) do
if mid(amystring,i,#op)==op then o=#op mystring = mystring .. " "..op.." " break end
end
end
if o>0 then o = o - 1 elseif mid(amystring,i,1)=="\t" or mid(amystring,i,1)=="\r" then mystring = mystring .. " " else mystring = mystring .. mid(amystring,i,1) end
end
end
local changed
repeat
local ns = replace(mystring," "," ")
changed = ns~=mystring
mystring=ns
until not changed
-- print ( mystring )
end
for i=1,#mystring do
local c=mid(mystring,i,1)
local b=ASC(c)
-- print(sprintf("%s: Character pos %4d/%4d; char %2X/%3d/%s; Word: %s; str: %s; wt: %s; << \"%s\"",track,i,#mystring,b,b,c,gword,openstring or "<< nil >>",wt,mystring)) -- debugline
if i<#mystring and mid(mystring,i,2) == "//" and (not openstring) then
if gword~="" then
chopped[#chopped+1]=gword
end
local ci=i+2
gword = "// comment: "..mid(mystring,ci,#mystring-ci)
break
elseif (c=='"' or c=="'") and (not openstring) then
openstring=true
if gword~="" then
chopped[#chopped+1]=gword
gword=c
end
openstring=c
elseif (c=='"' or c=="'") and openstring==c and i>1 and mid(mystring,i-1,1)~="\\" then
if (left(gword,1)~=c) then gword=c..gword end
chopped[#chopped+1]=gword..c
gword=""
openstring=nil
elseif openstring then
gword=gword..c
elseif c=="\t" or c==" " or c=="\r" or c=="\n" then -- (normally \n should be impossible, but 'just in case')
if gword~="" then
chopped[#chopped+1]=gword
gword=""
end
wt=""
elseif c=="$" then
wt = "$"
chopped[#chopped+1]="$"
gword=""
elseif c=="#" then
assert(gword=="","Unexpected # in "..track)
gword="#"
wt="txt"
elseif (i>1 and tcontains(operators,mid(mystring,i-1,2))) or (i<#mystring and tcontains(operators,mid(mystring,i,2))) or tcontains(operators,c) then
if wt=="txt" then
chopped[#chopped+1]=gword
gword=""
end
gword=gword..c
wt="op"
elseif c=="_" or (b>=65 and b<=90) or (b>=48 and b<=57) or (b>=97 and b<=122) or (c==".") or (c==":") then
if wt=="op" then
chopped[#chopped+1]=gword
gword=""
end
gword = gword..c
wt="txt"
else
error("NC: I don't know character: "..c.. "; "..track)
end
end
assert(not openstring,"NC: Unfinished string in "..track)
if gword~="nil" then chopped[#chopped+1] = gword end
--]]
if pure then return chopped end
local ret = {}
for c,e in ipairs(chopped) do
local word = {}
ret[#ret+1]=word
word.word=e
word.type="Unknown"
if tcontains(luakeywords,word.word) then
word.type="LuaKeyword"
elseif left(e,1)=="#" and c==1 then
word.type="NIL_directive"
elseif left(e,1)=="#" then
word.type="ElementCounter"
elseif left(e,2) == "//" then
word.type="Comment"
elseif tcontains(nilkeywords,word.word) or nilkeywords[word.word] then
word.type = "NILKeyword"
elseif tcontains(operators,word.word) then
word.type = "Operator"
elseif tonumber(word.word) then -- If not a number, 'tonumber' returns 'nil' causing the boolean expression to be false.
word.type ='number'
elseif (left(word.word,1)=='"' and right(word.word=='"') or (left(word.word,1)=="'" and right(word.word,1)=="'")) then
word.type = "string"
elseif vars[e] then
word.type = "NIL_identifier"
word.NILType = word.vars[e]
elseif _G[e] then
word.type = "Lua_identifier"
word.LuaType = type(_G[e])
end
end
return ret
end
mNIL.LuaLoadString = loadstring or load
-- Simple serializer routine
function mNIL.LuaSerialize(name,variable,level)
local LS=mNIL.LuaSerialize
level = level or 0
local function safe(str)
local ret= ""
for i=1,#str do
local ch = mid(str,i,1)
local bt = string.byte(ch)
if (bt>=97 and bt<=122) or (bt>=48 and bt<=57) or (bt>=65 and bt<=90) or ch==" " or ch=="_" then ret = ret .. ch else ret = ret .. "\\"..right("00"..bt,3) end
end
return ret
end
local ret = name .. " = "
local tabs = ""
for i=1,level do tabs = tabs .. "\t" end
if type(variable) == "table" then
if getmetatable(variable) then
return tabs.."-- "..name.." is set with a meta table can therefore not be serialized. If it's a class, serializes it separately! --"
end
ret = ret .. "{\n"
local comma=false
for k,v in pairs(variable) do
if right(ret,2)=="--" then ret = ret .."\n" else
if comma then ret = ret .. ",\n" end
comma=true
end
if type(k) == 'number' then
ret = ret .. LS('['..k..']',v,level+1)
elseif type(k) == 'boolean' then
local bk = 'false'; if v then bk='true' end
ret = ret .. LS('['..bk..']',v,level+1)
elseif type(k) == 'string' then
ret = ret .. LS('["'..safe(k)..'"]',v,level+1)
else
error('NSL: Table with '..type(k)..' as key cannot be serialized!');
end
end
ret = ret .. "}"
elseif type(variable) == "number" then
ret = ret .. variable
elseif type(variable) == "boolean" then
if variable then ret = ret .. "true" else ret = ret .. "false" end
elseif type(variable) == 'string' then
ret = ret .. '"'..safe(variable)..'"'
elseif variable==nil then
ret = ret .. "nil"
else
return tabs.."-- "..name.." is a "..type(variable).." and can therefore not be serialized in any way. --"
end
return tabs..ret
end
local LuaSerialize=mNIL.LuaSerialize
-- Stuff that NIL will need to make classes possible.
NILClass = {}
local function NewFromClass(classname,class, callconstructor, ...)
assert(class,"NR,NH: Class hack!")
assert(class.classname==classname,"NR,NH: Class naming hack!")
local locked = false
local allowprivate = false
local trueclass = {}
local faketable = {} -- Only used to link the meta table to...
local metatable = {}
trueclass.fields = {}
trueclass.where = {}
trueclass.statics = class.statics
trueclass.methods = class.methods
for k,v in pairs(class.fields) do
local wh = trueclass.fields
trueclass.where[k]="fields"
if v.static then
--print("GOT STATIC")
wh=trueclass.statics
trueclass.where[k]="statics"
end
-- print(callconstructor,classname,k,v.abstract)
if v.static and v.abstract then
error("NR: Static members may not be abstract!")
end
if callconstructor then
assert(not v.abstract,"NR: Cannot create new record when there are abstracts in the class") --"NR,NH: Abstract fields are not allowed at all, and especially not in a new defintion!")
end
--if (v.name~=k) then print("Mismatch >> ",v.name,k) end
--assert(v.name==k,"NR,NH: Field naming mismatch!")
--print("\027[32m"..dbg('trueclass',trueclass).."\027[0m")
v.name=k
if (not wh[v.name]) then
wh[v.name] = {}
wh[v.name].declaredata = v
wh[v.name].value = v.default
if v.idtype=="table" then wh[v.name].value={} end
wh[v.name].idtype=v.idtype
end
end
local function getmethod(func,...)
return function(...)
local oldprivate=allowprivate
allowprivate=true
local ret = func(faketable,...)
allowprivate=oldprivate
return ret
end
end
local function Dump(nostatic)
local wheres = {"statics","fields"}
local ret = "-- Dump out class --\n\n"
if nostatic then wheres={"fields"} end
--print(LuaSerialize("THE BIG SECRET",trueclass))
for _,where in ipairs(wheres) do
for k,field in pairs(trueclass[where]) do
-- print(LuaSerialize('field',field))
if field.declaredata.ikben=="field" then
ret = ret .. LuaSerialize("self."..k,field.value).."\n"
end
end
end
return ret
end
function metatable.__index(tab,key)
assert(type(key)=="string","NR: Invalid field (may not be "..type(key)..":"..tostring(key)..")")
--if key=="DUMP" then return Dump() end
if prefixed(key,".") then
if key==".isnilclass" then return true end
if key==".classname" then return class.classname end
if key==".parent" then return class.parent end
if key==".dump" then return Dump(true) end
if key==".fulldump" then return Dump(false) end
if key==".hasmember" then
return function(member)
local w = trueclass.where[member] or trueclass.where["$get."..member]
return w~=nil and w~=false
end
end
error("Invalid metakey")
end
local where = trueclass.where[key] or trueclass.where["$get."..key]
--print(dbg("class",trueclass))
--assert(where,"NR: Class has neither field nor method called "..key)
assert(where,"NR: (IDX) Class \""..class.classname.."\" has neither field nor method called "..key)
if (trueclass.where["$get."..key]) then
local dd = trueclass[where]["$get."..key].declaredata
if dd.static then
local oldprivate = allowprivate
allowprivate=true
local ret= dd.func()
allowprivate=oldprivate
return ret
else
return getmethod(dd.func)()
end
end
local ret = trueclass[where][key]
assert(ret,"NR,NI/NH: Field or method could not be properly retrieved: "..class.classname.."."..key)
assert(allowprivate or (not ret.declaredata.private),"NR: Access to private element ("..class.classname.."."..key..") denied")
if (ret.declaredata.ikben=="method") then
if (where=='fields') then
return getmethod(ret.declaredata.func)
else
return ret.declaredata.func
end
else
return ret.value
end
end
function metatable.__newindex(tab,key,value)
assert(type(key)=="string","NR: Invalid field")
if prefixed(key,".") then
if key==".dump" then
local l = assert((loadstring or load)("self = ... \t"..value,"Parsing Class Dump"))
allowprivate=true
l(faketable)
allowprivate=false
return
end
end
local where = trueclass.where[key] or trueclass.where["$set."..key]
--print(dbg("trueclass",trueclass))
assert(where,"NR: (NewIDX) Class \""..classname.."\" has neither field nor method called "..key)
assert(where=="fields" or where=="statics","NR: You can only redefine field variables, and "..key.." belongs to the "..where)
--print("\027[36m\027[40m"..dbg('trueclass',trueclass).."\027[0m")
if (trueclass.where["$set."..key]) then
local dd = trueclass[where]["$set."..key].declaredata
if dd.static then
return dd.func(value)
else
return getmethod(dd.func)(value)
end
end
local field = trueclass[where][key]
assert(not (field.declaredata.readonly and locked),"NR: Tried to reassign a read-only field")
assert(allowprivate or (not field.declaredata.private),"NR: Access to private ("..key..") element denied")
local idtype=field.declaredata.idtype
if idtype=='string' then
if type(value)=="number" then value=""..value
elseif value==nil then value="nil"
elseif value==true then value='true'
elseif value==false then value='false' end
end
assert(idtype,"NI: idtype==nil "..key)
assert(
(idtype=="var") or
(idtype=="string" and type(value)=="string") or
(idtype=="number" and type(value)=="number") or
(idtype=="boolean" and type(value)=="boolean") or
(idtype=="table" and (type(value)=="table" or value==nil)) or
(idtype=="userdata" and (type(value)=="userdata" or value==nil)) or
(idtype=="function" and (type(value)=="function" or value==nil)) or
(classes[idtype] and NILClass.BelongsToClass(value,idtype)),"NR: Value of type "..idtype.." expected for "..key.." in class "..classname
)
trueclass[where][key].value=value
end
function metatable.__gc(tab)
if (trueclass.fields.DESTRUCTOR) then
assert(trueclass.fields.DESTRUCTOR.declaredata.func and trueclass.fields.DESTRUCTOR.declaredata.idtype=="void" and (not trueclass.statics.DESTRUCTOR),"NR: Destructors may only exist as non-static 'void' functions!")
allowprivate=true
trueclass.fields.DESTRUCTOR.declaredata.func(faketable)
allowprivate=false
end
end
function metatable.__len(tab)
-- if trueclass.fields.LEN and trueclass.fields.DESTRUCTOR.declaredata.func then return trueclass.fields.LEN and trueclass.fields.DESTRUCTOR.declaredata.func(faketable) end
--print ("__len:test")
local ret = faketable.LEN
assert(type(ret)=="number","Invalid LEN return");
return ret
end
--[[
function metatable.__ipairs(tab)
return faketable.IPAIRS(),faketable,0
end
function metatable.__pairs(tab)
return faketable.PAIRS()
end
]]
--if trueclass.where.IPAIRS and trueclass.fields.IPAIRS.declaredata.func then metatable.__ipairs=trueclass.fields.IPAIRS.declaredata.func end
--if trueclass.where.PAIRS and trueclass.fields.PAIRS.declaredata.func then metatable.__pairs=trueclass.fields.PAIRS.declaredata.func end
setmetatable(faketable,metatable)
-- or trueclass.where["$get.]
if (callconstructor and trueclass.fields.CONSTRUCTOR) then
assert(trueclass.fields.CONSTRUCTOR.declaredata.func and trueclass.fields.CONSTRUCTOR.declaredata.idtype=="void" and (not trueclass.statics.CONSTRUCTOR),"NR: Constructors may only exist as non-static 'void' functions!")
allowprivate=true
trueclass.fields.CONSTRUCTOR.declaredata.func(faketable,...)
allowprivate=false
end
locked=true
return faketable
end
local function tablecopy(tab)
local ret = {}
local debug = false
if debug then print(" Copy table",tab) end
for k,v in pairs(tab) do
if type(v)=="table" then
if debug then print(">>",k) end
ret[k] = tablecopy(v)
else
if debug then print(">",k,v) end
ret[k]=v
end
end
if debug then print("/Copy table",tab) end
return ret
end
function NILClass.DeclareClass(name,identifiers,extends)
local reservednames = {"NEW"}
local class = classes[name]; assert(class,"NR,NH: Class name misinformation! Has the translation been altered with?")
local statics = {}; class.statics = statics
local fields = {}; class.fields = fields
local methods = {}; class.methods = methods
class.classname = name
if extends then
class.parentname = extends
class.parent = classes[extends]
-- [[DEBUG]] for k,v in pairs(classes) do print("Got class",k) end
assert(class.parent,string.format("NT:Non-existent class %s cannot be extended!",extends))
-- [[debug]] print(mNIL.LuaSerialize("parent",class.parent))
assert(class.parent.fields,string.format("NI: Internal error! Fieldless parent '%s' while extending into '%s'",extends,name))
for k,v in pairs(class.parent.fields) do
--fields[k] = {}
local cf=tablecopy(v) --class.parent.fields[k])
fields[k]=cf
--for k,v in pairs(fields) do
-- -- [[debug]] print("Copying field: "..k.." from parent "..extends)
-- cf[k]=v
--end
cf.fromparent=true
for fk,fv in pairs(class.parent.fields) do
if (fk=="default" and class.parent.fields.idtype=="table") then cf.default = 'new table' else cf[fk]=fv end
end
end
end
for k,v in pairs(identifiers) do
for _,na in ipairs(reservednames) do assert(k~=na,"NT: Cannot use '"..k.."' as element for a class, as the name has been reserved.") end
local old = fields[k]
if old then -- Check if overriding old stuff is allowed!
-- [[debug]] print("Checking old:"..k)
assert(old.fromparent,"NT: Duplicate field/method: "..k)
assert(not old.final,"NT: Final elements cannot be overridden: "..k)
end
fields[k] = {}
local cf=fields[k]
cf.fromparent=false
cf.name=k
for fk,fv in pairs(identifiers[k]) do
if (fk=="default" and identifiers=="table") then cf.default = NILClass.Emptytable() else cf[fk]=fv end
end
end
local forstatic
local ret = {}
local meta = {
__index = function(t,k)
if k=="NEW" or k=="NEWNOCONSTRUCTOR" then
return function(...)
if k=="NEW" then print("WARNING! The \".NEW()\" method to create new classes has been deprecated as of version 19.07.13, and may be removed in version 21.xx.xx or somewhere later.") end
return NewFromClass(name,class,k=='NEW',...)
end
else
assert(statics[k],"NR: Non-static or non-existent field called from static call (g:"..k..")")
return forstatic[k]
end
end,
__newindex = function(t,k,v)
if k=="NEW" or k=="NEWNOCONSTRUCTOR" or k=="DUMP" then
error("NT: You cannot redefine "..k)
end
assert(statics[k],"NR: Non-static or non-existent field called from static call (s:"..k..")")
forstatic[k]=v
end,
__call = function(t,...)
return NewFromClass(name,class,true,...)
end
}
setmetatable(ret,meta)
forstatic = ret.NEWNOCONSTRUCTOR()
return ret
end
function NILClass.BelongsToClass(v,c) -- Will also check parent variables *if* they exist!
if v==nil then return true end -- Seems odd, but all classes can contain 'nil' so I must keep the possibility in mind
if type(v)~='table' then return false end
local checkclass=v
while checkclass do
if not checkclass[".classname"] then return false end
if checkclass[".classname"] == c then return true end
checkclass = checkclass[".parent"]
end
return false
end
local function ch2string(ch)
--print(ch.type,ch.word)
if ch.type~="string" then return ch.word end
local ret = ch.word
if prefixed(ret,'"') or prefixed(ret,"'") then ret=right(ret,#ret-1) end
if suffixed(ret,'"') or suffixed(ret,"'") then ret= left(ret,#ret-1) end
return ret
end
local function usef2id(usef)
local u = replace(usef,"\\","/")
local s = split(u,"/")
local r = s[#s]
local i = split(r,".")
return i[1]
end
-- Translator itself
function mNIL.Translate(script,chunk)
assert(type(script)=='string',"NT: Translate wants a string for a script and not a "..type(script))
local ret = ""
local lines = split(replace(script,"\n\n","\n// whiteline!\n"),"\n")
local lmacro = {}
local amacro = {lmacro,macros}
local scopes = {[0]={kind="Base Scope",line=0}}
local scopelevel = function() return #scopes end
local scopetype = function() return scopes[#scopes].kind end
local scopestart = nil
local allowrepeatend
local modules = {} -- Just an array in order to return stuff properly.
local forwards = {}
local accepted = {}
local function newscope(kind,ln)
local lwith=scopes[#scopes].with or "_G"
scopes[#scopes+1] = { kind=kind, line=ln, with=lwith, id = string.format("scope%x",scopecounter) }
scopecounter = scopecounter + 1
end
local function buildfunction(id,chopped,tpestart,track,needself)
-- error(chopped[tpestart].word) --check
assert(chopped[tpestart].word=="(","NI: Function builder has been pointed wrong! "..track)
local params = {}
local assertion
local wantass = ""
local gotass = ""
local i = tpestart+1
local function addassert(a,wa,ga)
if wantass~="" then wantass=wantass..", " end wantass=wantass..wa
if gotass~="" then gotass=gotass.."..', '.." end gotass=gotass..ga
if not a then return end
if assertion then
assertion = assertion.." and "..a
else
assertion = a
end
end
if needself==true then params[1]="self" end -- for non-static methods.
assert(chopped[i],"NT: Unfinished function definition in "..track)
while (chopped[i].word~=")") do
while (chopped[i] and chopped[i].word=="") do i=i+1 end
assert(chopped[i] and chopped[i+1],"NT: Unfinished function definition in "..track)
local w = chopped[i].word
local nw = chopped[i+1].word
if w.word=="var" then -- optional, but implemented in case people don't realize it! ^_^
addassert(nil,"var","type("..nw..")")
params[#params+1]=nw
chopped[i+1].type="Function Parameter"
i = i + 2
elseif w=="string" then
params[#params+1]=nw
addassert( "type("..nw..")=='string'","string","type("..nw..")")
chopped[i+1].type="Function Parameter"
i = i + 2
elseif w=="int" or w=="number" then
params[#params+1]=nw
addassert( "type("..nw..")=='number'","number","type("..nw..")")
chopped[i+1].type="Function Parameter"
i = i + 2
elseif w=="bool" or w=="boolean" then
params[#params+1]=nw
addassert("type("..nw..")=='boolean'","boolean","type("..nw..")")
chopped[i+1].type="Function Parameter"
i = i + 2
elseif w=="table" then