@inproceedings{RewritingUnder-Homer2026,
    title = {Live Rewriting Under Concatenative Programming},
    booktitle = {Workshop on Live Programming},
    year = 2026,
    author = {Homer, Michael},
    abstract = {
        This system brings together two uncommon programming paradigms at
        once in a live environment where program structure, visualisation, and
        editing align in interesting ways. It combines concatenative,
        rewriting, and live programming in an interactive programming
        environment, using each of them to compensate for weaknesses of the
        other, while exposing the system state for inspection and for
        modification through both direct manipulation and evaluation of ad hoc
        code.

        The rest of this essay presents a live multi-stack concatenative
        programming system operating over a rewriting substrate, and argues for
        the value of such a hybrid. In this system, functions can be defined in
        conventional concatenative style, or as rewriting operations, or even
        combinations of both, and all application proceeds by rewriting the
        remaining program and state. In doing so, new possibilities for
        run-time intervention are exposed: the program can be paused and both
        state and pending code can be edited, including the equivalent of the
        call stack, but yet more dynamic options are also available, including
        evaluating other programs ad hoc within the main program's state. We
        also identify bindings between program-level stacks and external
        resources that can allow bidirectional direct manipulation of visible
        state.
    }
}