Id (programming language)

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Irvine Dataflow (Id) is a general-purpose parallel programming language, started at the University of California at Irvine in 1975[1] by Arvind and K. P. Gostelow.[2] Arvind continued work with Id at MIT into the 1990s.

The major subset of Id is a purely functional programming language with non-strict semantics. Features include: higher-order functions, a Milner-style statically type-checked polymorphic type system with overloading, user defined types and pattern matching, and prefix and infix operators. It led to the development of pH, a parallel dialect of Haskell.

Id programs are fine grained implicitly parallel.

The MVar synchronisation variable abstraction in Haskell is based on Id's M-structures.[3]


   type bool = False | True;
   False? :: bool -> bool
   and :: bool -> bool -> bool


The pHluid system was a research implementation of Id programming language, with future plans for a front-end for pH, a parallel dialect of the Haskell programming language, implemented at Digital's Cambridge Research Laboratory. and non-profit use. It is targeted at standard Unix workstation hardware.


  1. ^ Sharp, J.A. (1992). Data Flow Computing: Theory and Practice. Intellect, Limited. p. 125. ISBN 9780893919214. Retrieved 2014-12-02.
  2. ^ Arvind & K. P. Gostelow, The Id Report: An Asychronous Language and Computing Machine, Technical Report TR-114, Department of Information and Computer Science, University of California, Irvine, September 1978.
  3. ^ "Concurrent Haskell". Peyton-Jones, Gordon and Finne. POPL 1996

External links[edit]

  • ID Language Reference Manual, Rishiyur S. Nikhil, 1991.
  • "An Asynchronous Programming Language for a Large Multiprocessor Machine", Arvind et al., TR114a, Dept ISC, UC Irvine, Dec 1978