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library(scattered)

Allow a source file to contain non-consecutive clauses

Predicates

abort_compile_file(?, ?, ?)
No description available
end_compile_file(?, ?, ?)
No description available
non_consecutive_handler(?, ?, ?)
No description available
scattered(++PredSpec)
This declaration is obsolete, use discontiguous/1 instead.
start_compile_file(?, ?, ?)
No description available

Other Exports

export op(1000, fy, scattered)

Description

The ECLiPSe compiler does not allow the clauses for static predicates being non-consecutive, i.e. interleaved with clauses for other predicates. The event 134 "procedure clauses are not consecutive" is raised in such a case. The correct way to avoid this error is to use the discontiguous/1 declaration (ISO-Prolog compatible).

This library is therefore mostly obsolete!

It can still be useful for very old Prolog programs, which have been written for an interpreted system, and expect non-consecutive predicates to be generally allowed (without declaration). It is enough to load this library before compiling such a source file. It redefines the handler for the event 134 in such a way that the procedures with non-consecutive clauses are recompiled in one chunk after encountering the end of the file.

When not compiling from a file, the non-consecutive clauses have to be declared using the directive scattered/1. This declaration has to precede any clauses of the predicate. 

    :- lib(scattered).
    :- scattered p/3, q/1.
Note that this applies to predicates whose clauses are non-consecutive, but in a single file. Predicates that are spread over multiple files still have to be declared as dynamic.

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Generated from scattered.eci on Sat Aug 7 01:44:25 2004