(A French acronym for Synchronous real-time Lucid). Real-time
dataflow language for synchronous systems, especially
automatic control and signal processing. A Lucid subset,
plus timing operators and user-defined clocks.
Designed for automatic control applications. It is based on
the idea that automatic control engineers use to analyse, and
specify their systems in terms of functions over sequences
(sampled signals). It thus seems both safe and cost effective
to try to compile directly those descriptions into executable
code. A lot of work has been done, so as to get efficient
compilation, and also in formal verification. The language
has been used in nuclear plant control, and will be used in
aircraft control.
["Outline of a Real-Time Data-Flow Language", J.-L. Bergerand
et al, Proc IEE-CS Real Time Systems Symp, San Diego, IEEE Dec
1985, pp. 33-42].
["LUSTRE: A Declarative Language for Programming Synchronous
Systems", P. Caspi et al, Conf Rec 14th Ann ACM Symp on Princ
Prog Langs, 1987].
