Standard ML of New Jersey

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Standard ML of New Jersey
Paradigm(s) multi-paradigm: functional, imperative
Stable release 110.76 / August 23, 2013; 12 months ago (2013-08-23)
Typing discipline strong, static, inferred
Influenced by Standard ML
Influenced Mythryl
License BSD-like license[1]
Website http://www.smlnj.org/

Standard ML of New Jersey (SML/NJ) is a compiler and programming environment for Standard ML. Aside from its runtime system, which is written in C, SML/NJ is written in Standard ML. It was developed jointly by Bell Laboratories and Princeton University.

Its name is a reference both to the state in which Princeton and Bell Labs are located and to Standard Oil of New Jersey, the famous oil monopoly of the early 20th century.

Features[edit]

SML/NJ extends the SML'97 Basis Library with several additional top-level structures:

  • System info – this module provides information about the runtime system, such as the Operating System kind, type and version and whether or not the machine supports multiprocessing.
  • Weak pointers – a weak pointer is one that is not sufficient to keep an object alive. If a heap value is referenced via ordinary pointers then it will remain alive, but if it is only referenced via weak pointers then it will be garbage collected.
  • Lazy suspensions – this module implements the suspensions necessary for lazy evaluation (as opposed to eager evaluation).
  • Compiler internals – SML/NJ provides access to several of the compiler internals, including methods to instantiate and modify the signal table.
  • Unsafe access – these modules provide unsafe access to data structures and runtime-system functions.
  • Compiler modules – SML/NJ also includes a structure that provides control of the ML compiler, which contains substructures for execution profiling, control of compiler error-message printing and warnings, and customizable pretty printing.

See also[edit]

External links[edit]

Footnotes[edit]

  1. ^ Standard ML of New Jersey License. Smlnj.org. Retrieved on 2013-08-11.