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Diffstat (limited to 'example.lua')
-rw-r--r-- | example.lua | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/example.lua b/example.lua new file mode 100644 index 0000000..47d25c6 --- /dev/null +++ b/example.lua @@ -0,0 +1,32 @@ +local Object = require "Object" + +local Point = Object:extends() -- creating new class by extending basic class +function Point:new (x, y) -- defining function called by constructor for newly created class + self.x = x -- instance created by constructor is `self` + self.y = y +end -- no returns needed + +Point.NUMBER = 10 -- setting some global values for class + +function Point:__tostring () -- metamethod used with `tostring()` + return "Point<" .. self.x .. ", " .. self.y .. ">" +end + +local a = Point(3, 2) -- create new instance by calling class +print(tostring(a)) + +assert(a:is(Point)) -- you can also check if object is instance of class +assert(a:is(Object)) -- use `is()` method for it + +local Foo = Point:extends() -- you can extend whatever class you want +function Foo:new (str, x, y) + self.__super.new(self, x, y) -- call super constructor first + self.str = str -- do whatever else is left to be done +end + +function Foo:__tostring () -- metamethods are not inherited + return "Foo(" .. self.str .. ")<" .. self.x .. ", " .. self.y .. ">" +end + +local b = Foo("lorem", 7, -1) +print(tostring(b)) |