===============================================================================
Booleans
===============================================================================

func boolean() bool {
	right = true;
	wrong = false;
	right_or_wrong = right || wrong;
	right_and_wrong = right && wrong;
	return true;
}

-------------------------------------------------------------------------------

(source_file
	(function_definition
		(identifier)
		(parameters)
		(primitive_type)
		(block
			(assign_statement
				(identifier)
				(boolean_literal))
			(assign_statement
				(identifier)
				(boolean_literal))
			(assign_statement
				(identifier)
				(binary_expression
					(identifier)
					(identifier)))
			(assign_statement
				(identifier)
				(binary_expression
					(identifier)
					(identifier)))
			(return_statement (boolean_literal)))))

===============
literal 'true'
===============

func a() bool {
	return true;
}

---

(source_file
	(function_definition
		(identifier)
		(parameters)
		(primitive_type)
		(block
			(return_statement
				(boolean_literal)))))

===============================================================================
literal 'false'
===============================================================================

func a() bool {
	return false;
}

-------------------------------------------------------------------------------

(source_file
	(function_definition
		(identifier)
		(parameters)
		(primitive_type)
		(block
			(return_statement
				(boolean_literal)))))