SISAL
"Streams and Iteration in a Single Assignment Language" is a general-purpose single assignment functional programming language with strict semantics, implicit parallelism, and efficient array handling. It was derived from VAL (Value-oriented Algorithmic Language by Jack Dennis), and adds recursion and finite streams.

By: James McGraw
First appeared: 1983
First compiled implementation: 1986
Paradigms: #functional, #dataflow
Syntax: #Pascal -like
Performance: superior to #C and rivals #Fortran

SISAL is more than just a dataflow and fine-grain language; it is a set of tools that convert a textual human readable dataflow language into a graph format (named IF1 - Intermediary Form 1). Part of the SISAL project also involved converting this graph format into runable C code.

In 2010 SISAL saw a brief resurgence when a group of undergraduates at Worcester Polytechnic Institute investigated implementing a fine-grain parallelism backend for the SISAL language.

In 2018 SISAL got modernized with ident-based syntax, first-class functions, lambdas, closures and lazy semantics within project SISAL-IS.

#SISAL