# Generate a string value
	fun string_instance(string: String): RuntimeVariable
	do
		var mtype = mmodule.string_type
		var name = self.get_name("varonce")
		self.add_decl("static {mtype.ctype} {name};")
		var res = self.new_var(mtype)
		self.add("if (likely({name}!=NULL)) \{")
		self.add("{res} = {name};")
		self.add("\} else \{")
		var native_mtype = mmodule.c_string_type
		var nat = self.new_var(native_mtype)
		self.add("{nat} = \"{string.escape_to_c}\";")
		var byte_length = self.int_instance(string.byte_length)
		var unilen = self.int_instance(string.length)
		self.add("{res} = {self.send(self.get_property("to_s_unsafe", native_mtype), [nat, byte_length, unilen, value_instance(false), value_instance(false)]).as(not null)};")
		self.add("{name} = {res};")
		self.add("\}")
		return res
	end