Reference lib.

examples/resources/lib/reference.lua

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+local Reference = {}
+local metatable = {
+	__index = Reference,
+	__tostring = function( r )
+		return tostring( r.t[ r.k ] )
+	end,
+	__add = function( r, v )
+		return r.t[ r.k ] + v
+	end,
+	__sub = function( r, v )
+		return r.t[ r.k ] - v
+	end,
+	__mul = function( r, v )
+		return r.t[ r.k ] * v
+	end,
+	__div = function( r, v )
+		return r.t[ r.k ] / v
+	end,
+	__mod = function( r, v )
+		return math.fmod( r.t[ r.k ], v )
+	end,
+	__pow = function( r, v )
+		return r.t[ r.k ] ^ v
+	end,
+	__unm = function( r )
+		return -r.t[ r.k ]
+	end,
+	__eq = function( r, v )
+		return r.t[ r.k ] == v
+	end,
+	__len = function( r )
+		return #r.t[ r.k ]
+	end,
+	__lt = function( r, v )
+		return r.t[ r.k ] < v
+	end,
+	__le = function( r, v )
+		return r.t[ r.k ] <= v
+	end,
+	__concat = function( a, b )
+		return tostring( a )..tostring( b )
+	end,
+	__call = function( r, ... )
+		return r.t[ r.k ]( ... )
+	end,
+}
+
+-- Table and key. Note that k should be name of the variable so the type must be string.
+function Reference:new( t, k )
+	local object = setmetatable( {}, metatable )
+
+	object.t = t
+	object.k = k
+
+	return object
+end
+
+-- Set new reference. Table and key. Note that k should be name of the variable so the type must be string.
+function Reference:ref( t, k )
+	self.t = t
+	self.k = k
+end
+
+function Reference:set( v )
+	self.t[ self.k ] = v
+end
+
+function Reference:get()
+	return self.t[ self.k ]
+end
+
+function Reference:unpack()
+	return self.t, self.k
+end
+
+function Reference:clone()
+	return Reference:new( self.t, self.k )
+end
+
+function Reference:addEq( v )
+	self.t[ self.k ] = self.t[ self.k ] + v
+end
+
+function Reference:subEq( v )
+	self.t[ self.k ] = self.t[ self.k ] - v
+end
+
+function Reference:mulEq( v )
+	self.t[ self.k ] = self.t[ self.k ] * v
+end
+
+function Reference:divEq( v )
+	self.t[ self.k ] = self.t[ self.k ] / v
+end
+
+return Reference