Rune lib and __concat for variable libs.

examples/resources/lib/color.lua

@@ -41,6 +41,9 @@ Color.meta = {
 		and math.floor( c1.b ) == math.floor( c2.b )
 		and math.floor( c1.a ) == math.floor( c2.a )
 	end,
+	__concat = function( a, b )
+		return tostring( a )..tostring( b )
+	end,
 }
 
 function Color:new( r, g, b, a )

examples/resources/lib/matrix.lua

@@ -41,7 +41,10 @@ Matrix.meta = {
 	end,
 	__mul = function( m1, m2 )
 		return Matrix:new( RL.MatrixMultiply( m1, m2 ) )
-	end
+	end,
+	__concat = function( a, b )
+		return tostring( a )..tostring( b )
+	end,
 }
 
 function Matrix:new( m )

examples/resources/lib/quaternion.lua

@@ -33,6 +33,9 @@ Quaternion.meta = {
 	__eq = function( q1, q2 )
 		return RL.QuaternionEquals( q1, q2 ) == 1
 	end,
+	__concat = function( a, b )
+		return tostring( a )..tostring( b )
+	end,
 }
 
 function Quaternion:new( x, y, z, w )

examples/resources/lib/rectangle.lua

@@ -38,6 +38,9 @@ Rectangle.meta = {
 	__eq = function( r1, r2 )
 		return RL.Vector2Equals( { r1.x, r1.y }, { r2.x, r2.y } ) and RL.Vector2Equals( { r1.width, r1.height }, { r2.width, r2.height } )
 	end,
+	__concat = function( a, b )
+		return tostring( a )..tostring( b )
+	end,
 }
 
 function Rectangle:new( x, y, width, height )

examples/resources/lib/rune.lua

@@ -0,0 +1,97 @@
+-- For luaJit compatibility.
+if table.unpack == nil then
+	table.unpack = unpack
+end
+
+local Rune = {}
+Rune.meta = {
+	__index = Rune,
+	__tostring = function( r )
+		return r.string
+	end,
+	__len = function( r )
+		return RL.GetCodepointCount( r.string )
+	end,
+	__eq = function( r1, r2 )
+		return r1.string == r2.string
+	end,
+	__concat = function( a, b )
+		return tostring( a )..tostring( b )
+	end,
+}
+
+function Rune:new( string )
+	if type( string ) == "table" then
+		string = RL.LoadUTF8( string )
+	elseif type( string ) == "nil" then
+		string = ""
+	end
+
+	local object = setmetatable( {}, Rune.meta )
+
+	object.string = string
+
+	return object
+end
+
+function Rune:set( string )
+	if type( string ) == "table" then
+		string = RL.LoadUTF8( string )
+	elseif type( string ) == "nil" then
+		string = ""
+	end
+
+	self.string = string
+end
+
+function Rune:clone()
+	return Rune:new( self.string )
+end
+
+function Rune:len()
+	return RL.GetCodepointCount( self.string )
+end
+
+function Rune:getCodepoints()
+	return RL.LoadCodepoints( self.string )
+end
+
+function Rune:getCodepoint( index )
+	local codepoint = RL.GetCodepoint( self:sub( index, index ) )
+	return codepoint
+end
+
+function Rune:getCodepointSize( index )
+	local _, codepointSize = RL.GetCodepoint( self:sub( index, index ) )
+	return codepointSize
+end
+
+function Rune:insert( pos, string )
+	local codepoints = self:getCodepoints()
+
+	for i, codepoint in ipairs( RL.LoadCodepoints( string ) ) do
+		table.insert( codepoints, pos + i - 1, codepoint )
+	end
+	self.string = RL.LoadUTF8( codepoints )
+end
+
+function Rune:sub( i, j )
+	local codepoints = self:getCodepoints()
+	return RL.LoadUTF8( { table.unpack( codepoints, i, j ) } )
+end
+
+function Rune:gsub( pattern, repl )
+	return string.gsub( self.string, pattern, repl )
+end
+
+function Rune:split( delimiter )
+	local splits = {}
+
+	for str in string.gmatch( self.string, "([^"..delimiter.."]+)" ) do
+		table.insert( splits, str )
+	end
+
+	return splits
+end
+
+return Rune

examples/resources/lib/utillib.lua

@@ -83,14 +83,14 @@ function utillib.tableLen( t )
     return count
 end
 
-function utillib.split( str, sep )
+function utillib.split( string, sep )
 	if sep == nil then
 		sep = "%s"
 	end
 
 	local t = {}
 
-	for str in string.gmatch( str, "([^"..sep.."]+)" ) do
+	for str in string.gmatch( string, "([^"..sep.."]+)" ) do
 		table.insert( t, str )
 	end
 

examples/resources/lib/vector2.lua

@@ -36,6 +36,9 @@ Vector2.meta = {
 	__eq = function( v1, v2 )
 		return RL.Vector2Equals( v1, v2 ) == 1
 	end,
+	__concat = function( a, b )
+		return tostring( a )..tostring( b )
+	end,
 }
 
 function Vector2:new( x, y )

examples/resources/lib/vector3.lua

@@ -38,6 +38,9 @@ Vector3.meta = {
 	__eq = function( v1, v2 )
 		return RL.Vector3Equals( v1, v2 ) == 1
 	end,
+	__concat = function( a, b )
+		return tostring( a )..tostring( b )
+	end,
 }
 
 function Vector3:new( x, y, z )