Class4Lua/Class4Lua.lua at master · CodeLiners/Class4Lua · GitHub

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#!/usr/bin/lua
localargs= {...}
localpath=args[1]

localregistry=setmetatable({ class= {}, instance= {} }, { __mode='k' })
localclasspath= {}

localinstantiate

localbaseClass= {
__index=function(self, key)
ifregistry.class[self].vars[key].privatethen
error(key..' has private access in '..registry.class[self].name..'.', 2)
elseifnotregistry.class[self].vars[key].staticthen
error('Non static '..(type(registry.class[self].vars[key].value) =='function' and'method' or'variable')..]' cannot be referenced from a static context.', 2)
end
returnregistry.class[self].vars[key].value
end,

__newindex=function(self, key, val)
ifregistry.class[self].vars[key].privatethen
error(key..' has private access in '..registry.class[self].name..'.', 2)
elseifregistry.class[self].vars[key].finalthen
error('Cannot assign a value to final variable'..key..'.', 2)
end
registry.class[self].vars[key].value=val
end,

__call=function(self, ...)
returninstantiate(self, ...)
end,

__tostring=function(self)
error('Non static method cannot be referenced from a static context.', 2)
end,

__metatable=false
}

localbaseInstance= {
__index=function(self, key)
ifregistry.instance[self].vars[key].privatethen
error(key..' has private access in '..registry.class[registry.instance[self].superClass].name..'.', 2)
elseifregistry.class[self].vars[key].staticthen
returnregistry.class[registry.instance[self].superClass].vars[key].value
end
returnregistry.class[self].vars[key].value
end,

__newindex=function(self, key, val)
ifregistry.class[self].vars[key].privatethen
error(key..' has private access in '..registry.class[registry.instance[self].superClass].name..'.', 2)
elseifregistry.class[self].vars[key].finalthen
error('Cannot assign a value to final variable'..key..'.', 2)
end
registry.class[self].vars[key].value=val
end,

__tostring=function(self)
ifregistry.class[self].meta.tostringthen
returnregistry.class[self].meta.tostring()
else
returnregistry.class[registry.instance[self].superClass].name..'@'..registry.class[self].system.addr
end
end,

__metatable=false
}

localfunctionassert(condition, msg, lvl)
ifnotconditionthenerror(msg, lvl+1) end
end

fork,vinipairs({'add', 'sub', 'mul', 'div', 'mod', 'pow', 'unm', 'concat', 'eq', 'lt', 'le'}) do
baseClass['__'..v] =function(self, ...)
registry.class[self].meta[v](...)
end
end

localfunctionclass(qualifiedpath, public, final, abstract, static)
localclass= {}
registry.class[class] = {
name=qualifiedpath:match('([^%.]+)$'),
package=qualifiedpath:match('(.-)[^%.]+$'):gsub('.$','')
qualifiedpath=qualifiedpath
system= {
type="Class",
public=publicorfalse,
final=finalorfalse,
abstract=abstractorfalse,
static=staticorfalse,
superClass=false,
subClasses= {},
interfaces= {},
addr=tostring(class)
 },
vars= {},
meta= {}
	}
localcurrpkg=classpath
forseginqualifiedpath:gmatch('[^%.]+') do
ifseg==registry.class[class].namethen
currpkg[seg] =class
break
else
currpkg[seg] = {}
currpkg=currpkg[seg]
end
end
returnsetmetatable(class,baseClass)
end

localfunctioninstantiate(class, ...)
assert(registry.class[self].__system.__abstract, 'Cannot instantiate from abstract class.', 3)
localinstance= {}
registry.instance[instance] = {
system= {
type="Instance",
superClass=class,
addr=tostring(instance)
 },
vars= {
toString= {value=baseInstance.__tostring, public=true}
 },
meta= {}
	}
localinstance=setmetatable(instance, baseInstance)
ifregistry.class[class].constructorthen
registry.class[class].constructor(instance, ...)
end
returninstance
end