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De - Pt| English Dictionary: CLU | by the DICT Development Group |
| 1 result for CLU | |
| From The Free On-line Dictionary of Computing (15Feb98) [foldoc]: | |
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CLU CLUster. An {object-oriented} programming language developed at {MIT} by Liskov et al in 1974-1975. CLU is an {object-oriented} language of the {Pascal} family designed to support data abstraction, similar to {Alphard}. It introduced the {iterator}: a {coroutine} yielding the elements of a data object, to be used as the sequence of values in a 'for' loop. A CLU program consists of separately compilable procedures, {cluster}s and iterators, no nesting. A cluster is a module naming an abstract type and its operations, its internal representation and implementation. Clusters and iterators may be generic. Supplying actual constant values for the parameters instantiates the {module}. There are no {implicit type conversion}s. In a cluster, the explicit type conversions 'up' and 'down' change between the abstract type and the representation. There is a universal type 'any', and a procedure force[] to check that an object is a certain type. Objects may be mutable or {immutable}. {Exception}s are raised using 'signal' and handled with 'except'. {Assignment} is by sharing, similar to the sharing of data objects in {Lisp}. Arguments are passed by {call-by-sharing}, similar to {call-by-value}, except that the arguments are objects and can be changed only if they are mutable. CLU has {own variable}s and multiple assignment. See also {Kamin's interpreters}, {clu2c}. ["CLU Reference Manual", Barbara Liskov et al, LNCS 114, Springer 1981]. E-mail: Paul R. Johnson {Versions for Sun and VAX/VMS (ftp://pion.lcs.mit.edu/pub/clu/)}. {Portable version (ftp://mintaka.lcs.mit.edu/pub/dcurtis/)}. (1994-12-16) | |
