prolog_clause:open

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Predicate open_source/2

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swipl
- library

open_source(+File, -Stream) is semidet[multifile, library(prolog_clause)]

Hook into clause_info/5 that opens the stream holding the source for a specific clause. Thus, the query must succeed. The default implementation calls open/3 on the File property.

clause_property(ClauseRef, file(File)),
prolog_clause:open_source(File, Stream)