A quine program is a program that prints out the source codes of itself. To be more fun, the source codes should not be read from the source file, nor should it be stored in some kind of global variable from which to be accessed. An interesting quine program should reconstruct its source codes programatically in some way. A list of quine programs in other languages can be found one RosettaCode .

A simple quine program in Dao can be produced easily by porting the C implementation in C to Dao. But the more interesting way is to write a quine using Dao macros: It works with the development version of Dao available from the mercurial repository of Dao on google code . The idea of this quine program is to use macro to transform the following new syntax: into an io expression with the expression itself being "glued" into a string by quoting the macro variable in the target syntax, This seems to be the simplest quine program that can be written using Dao macro.