Rune lib and __concat for variable libs.

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