Add type annotations to fix after breaking change

examples/diagnostics.cr

@@ -3,6 +3,7 @@ require "crsfml/window"
 require "crsfml/graphics"
 require "crsfml/audio"
 
+$font : SF::Font
 $font = SF::Font.from_file("resources/font/Ubuntu-R.ttf")
 
 $window = SF::RenderWindow.new(

examples/snakes.cr

@@ -24,7 +24,7 @@ struct Food
   property position
   property color
 
-  def initialize(@position, @color)
+  def initialize(@position : SF::Vector2(Int32), @color : SF::Color)
   end
 
   def draw(target, states)
@@ -36,9 +36,11 @@ struct Food
 end
 
 class Snake
-  getter body
+  @direction : SF::Vector2(Int32)
+
+  getter body : Array(SF::Vector2(Int32))
 
-  def initialize(@field, start, @color)
+  def initialize(@field : Field, start, @color : SF::Color)
     @direction = Up
     @body = [] of SF::Vector2(Int32)
     (0...3).each do |i|
@@ -122,9 +124,9 @@ class Snake
 end
 
 class Field
-  getter size
+  getter size : SF::Vector2(Int32)
 
-  def initialize(@size)
+  def initialize(@size : SF::Vector2(Int32))
     @snakes = [] of Snake
     @foods = [] of Food
   end

examples/transformable.cr

@@ -1,6 +1,7 @@
 require "crsfml"
 
 
+$font : SF::Font
 $font = SF::Font.from_file("resources/font/Ubuntu-R.ttf")
 
 class Logo

src/audio.cr

@@ -70,6 +70,8 @@ module SF
     # :nodoc:
     alias FuncBox = Box({(CSFML::SoundStreamChunk* -> CSFML::Bool), (Time -> Nil)})
 
+    @funcs = Pointer(Void).null
+
     def initialize(channel_count : Int, sample_rate : Int)
       @owned = true
       @funcs = FuncBox.box({
@@ -98,6 +100,8 @@ module SF
     # :nodoc:
     alias FuncBox = Box({(-> CSFML::Bool), ((Int16*, LibC::SizeT) -> CSFML::Bool), (-> Nil)})
 
+    @funcs = Pointer(Void).null
+
     def initialize()
       @owned = true
       @funcs = FuncBox.box({

src/common_obj.cr

@@ -42,23 +42,23 @@ module SF
 
       # Put the pointer into the wrapper object.
       # The pointer will **not** be freed on GC.
-      def self.wrap_ptr(ptr : T)
+      def self.wrap_ptr(ptr : T) : self
         new(ptr, false)
       end
 
       # Put the pointer into the wrapper object.
       # The pointer will **not** be freed on GC.
       #
       # Returns nil instead of `null` pointer.
-      def self.wrap_ptr?(ptr : T)
+      def self.wrap_ptr?(ptr : T) : self?
         ptr ? new(ptr, false) : nil
       end
 
       # Transfer ownership of the pointer to the wrapper object.
       # The pointer will be freed on GC.
       #
       # Raises `NullResult` if the passed pointer is `null`.
-      def self.transfer_ptr(ptr : T)
+      def self.transfer_ptr(ptr : T) : self
         raise NullResult.new unless ptr
         new(ptr, true)
       end

src/system.cr

@@ -166,6 +166,8 @@ module SF
   end
 
   class Thread
+    @func = Pointer(Void).null
+
     def initialize(function : ->)
       @owned = true
       @func = Box.box(function)
@@ -194,6 +196,8 @@ module SF
     # :nodoc:
     alias FuncBox = Box({((Void*, Int64) -> Int64), ((Int64) -> Int64), (-> Int64), (-> Int64)})
 
+    @funcs = Pointer(Void).null
+
     def initialize
       @funcs = FuncBox.box({
         ->(data: Void*, size: Int64) { read((data as Pointer(UInt8)).to_slice(size.to_i)).to_i64 },