Janus (time-reversible computing programming language)

Janus is a time-reversible programming language written at Caltech in 1982. The operational semantics of the language were formally specified, together with a and an invertible self-interpreter, in 2007 by Tetsuo Yokoyama and Robert Glück. A Janus inverter and interpreter is made freely available by the TOPPS research group at DIKU. Another Janus interpreter was implemented in Prolog in 2009. The below summarises the language presented in the 2007 paper.

Janus (time-reversible computing programming language)

Janus is a time-reversible programming language written at Caltech in 1982. The operational semantics of the language were formally specified, together with a and an invertible self-interpreter, in 2007 by Tetsuo Yokoyama and Robert Glück. A Janus inverter and interpreter is made freely available by the TOPPS research group at DIKU. Another Janus interpreter was implemented in Prolog in 2009. The below summarises the language presented in the 2007 paper.