Feder: Reference Manual

Modules

Modules separate code by functionality. A module has an own environment and is added as id from moduledecl to the parent environment. A module's id must start with an lowercase, alphabetic character.

Libraries are also just modules.

Example:

module hello
	func world
		null io.println("Hello, World!")
	;
;

func main
	hello.world() // Prints hello world to standard output
;

Variables

Variables in modules can be either global, if the module has only modules and library as parents otherwise the variable is local.

Non-primitive, global variables are initialized when first called (lazy-initialization).

Examples:

module mymod
	class Person (name : String,
		          age : u8)
		func getName(this : This) =
			name;
		func getAge(this : This) =
			age;
	;

	myglobvalue := 100          // primitive global variable
	me := Person("Someone", 16) // me is not initialized !!!
;

func main
	io.println(mymod.myglobvalue)
	io.println(mymod.me.getName()) // Initialized mymod.me
;